Date   
Re: V4 TX problems and new finals #ubitx-help

 

If you have adjusted the bias then GATE cannot be 0V.

Check voltage on R97 and 98 both sides of the resistors and see what you get.

When KEY down the TX has RF in CW mode and readings will go haywire.


At 14/12/2019, you wrote:
opps (sorry, hit enter too soon)

q94

D  15/15/7+-
G  0/0/-.09
S  0/0/0

q95
D  15/15/7->8+-
G  0/0/-.10
S  0/0/0

With key down, the Gates move around a bit.

Thanks so much for all help here!!!!!!

[]  

Re: #ubitx #ubitx-help #v5 #calibration Calibration procedure needed #ubitx #ubitx-help #v5 #calibration

Przemek
 

Anyone?

Re: V4 TX problems and new finals #ubitx-help

Anthony Gomes
 

Did you changed the setting of those "Blue" pots RV2 & RV3 after changing the IRF510. Even if you have no worries you could have reduced the gate voltage (remember turning those pots clockwise reduces the voltage/current  and anti clockwise increases them). since the output of U2 is toggling between 0 & 5V while TX your 5v regulator is still alive.

If you have not changed the setting of those pots RV2 & RV3. Then I would suggest to check the voltage reading at both side of R97 & R98.

I feel you are very close to fix your radio, next task will be to fix the Gate voltage/current for those replaced IRF510. Please note I am referring to Gate "voltage/current" but the accurate way is to set the "Current". I personally feel the voltage reference is easy for quick check because for current check you need to set your multimeter in series with your radio power supply.

73
Anthony
VU3JVX

Re: V4 TX problems and new finals #ubitx-help

Don - KM4UDX
 

opps (sorry, hit enter too soon)

q94

D  15/15/7+-
G  0/0/-.09
S  0/0/0

q95
D  15/15/7->8+-
G  0/0/-.10
S  0/0/0

With key down, the Gates move around a bit. 

Thanks so much for all help here!!!!!!

Re: V4 TX problems and new finals #ubitx-help

Don - KM4UDX
 

Thank you!!!! For a Liberal Arts major, that means a lot!!!!

I tested U2 and it toggles between 0 and +5 on RX to TX. And the bias was set at ~100ma per 510.

I did more tests on the IRFs using +15v for PA+

Resting RX,     TX no mod,     TX mod key down

q:94

D  15/15/7+-

Re: V4 TX problems and new finals #ubitx-help

Anthony Gomes
 

Don, you did a good job. I won't worry about Q90 as you must have seen the document says not to worry about small variation. But I find it unusual that you don't see any Gate voltage for Q94/95 it should be around 4+ volts. Since you are not getting it for both the MOSFET  can you check if there is any voltage at 5v regulator U2 output pin, it should be 5V.

But if I remember correctly you did set the gate voltage to 100mA after changing the IRF510.

73
Anthony
VU3JVX

Re: V4 TX problems and new finals #ubitx-help

Don - KM4UDX
 

Evan, Raj, Jerry, + Co.

I feel like I just finished Lab Class for Electronics 101.  My lab notes are attached for credit. 

All the transistors measured with V+12.01 in TX mode w/no modulation and no PA V+ (lift the brown wire).
Results follow your measurements, except three.
1&2:    Q94/95 Gates = 0 vs your 4.14.  When I apply PA V+ (connect brown to +15v), the Drain = 15, Gate =0, Source=0.
Note: I checked U2, and output toggles 0/5 between RX/TX.
3:        Q90 Emitter is 2.8 vs your 3.4.

Re: bitx v6 is here

Buddy Brannan
 

Hi,

I haven’t found calibration instructions. Assembly, circuit descriptions (which are fantastic by the way), yes…but somehow I’ve missed the calibration instructions.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962

On Dec 13, 2019, at 9:58 PM, Ashhar Farhan <farhanbox@...> wrote:

We have left the old traces, connectors etc in exactly the same place. The software is backwards compatible with the previous versions. If your board has 12 mhz, you have to just edit that one line to change the second IF.
I have also written a new calibration rountine that makes it easy to calibrate without needing any instrumentation in the shack. You set the dial to the frequency of a known station, get into calibration mode, and then keep spinning the tuning knob until you are zero-beat with the known signal.
73, f

On Sat 14 Dec, 2019, 4:43 AM Rick Green, <rtg@...> wrote:
What I think he meant, and what I was wondering, is whether you added any new
thru-holes for easier imstallation of some common mods.
Specifically, the tx/rx LEDs that came with the custom case kit, and the N8DAH
AGC board. Have you designed in thru-holes and solder jumper so that these can
be installed without having to scrape, cut and solder the fine traces?

On Fri, 13 Dec 2019, Ashhar Farhan wrote:

All the cables and connectors of v5 are preserved as it. The only thing you need to do is to swap the 16x2 LCD for a tft display.Unfortunately, we are selling the boxes only as a part of the kit. These
boxes are so heavy that the extra money is mostlt the freight charge.

On Fri 13 Dec, 2019, 10:27 PM Cory King, <cory@...> wrote:

What I'm wondering is, now that all the connectors are soldered into the board, will the v6 board have thru-holes on it to solder in audio cables? That way it is easy to hook up all those
soundcard daughterboards for digital modes and/or hook up some of the Auto Gain Control cards I see floating around? Would be cool to have strategically placed thru-holes on it to hook up some
of the pan-adapters I've seen around as well.

Anyway, this seems like a pretty good evolution of this radio!
--
Rick Green N8BJX

We, the People of the United States of America, reject the U.S. Supreme Court's
Citizens United ruling, and move to amend our Constitution to firmly establish
that money is not speech, and that human beings, not corporations, are persons
entitled to constitutional rights.

http://www.MoveToAmend.org




Re: bitx v6 is here

Dale Hardin
 

Did you have to re-design the Radiuno connector locations to fit the new display?

On Fri, Dec 13, 2019 at 8:58 PM Ashhar Farhan <farhanbox@...> wrote:
We have left the old traces, connectors etc in exactly the same place. The software is backwards compatible with the previous versions. If your board has 12 mhz, you have to just edit that one line to change the second IF.
I have also written a new calibration rountine that makes it easy to calibrate without needing any instrumentation in the shack. You set the dial to the frequency of a known station, get into calibration mode, and then keep spinning the tuning knob until you are zero-beat with the known signal.
73, f

On Sat 14 Dec, 2019, 4:43 AM Rick Green, <rtg@...> wrote:
What I think he meant, and what I was wondering, is whether you added any new
thru-holes for easier imstallation of some common mods.
   Specifically, the tx/rx LEDs that came with the custom case kit, and the N8DAH
AGC board.  Have you designed in thru-holes and solder jumper so that these can
be installed without having to scrape, cut and solder the fine traces?

On Fri, 13 Dec 2019, Ashhar Farhan wrote:

> All the cables and connectors of v5 are preserved as it. The only thing you need to do is to swap the 16x2 LCD for a tft display.Unfortunately, we are selling the boxes only as a part of the kit. These
> boxes are so heavy that the extra money is mostlt the freight charge.
>
> On Fri 13 Dec, 2019, 10:27 PM Cory King, <cory@...> wrote:
>
>       What I'm wondering is, now that all the connectors are soldered into the board, will the v6 board have thru-holes on it to solder in audio cables?  That way it is easy to hook up all those
>       soundcard daughterboards for digital modes and/or hook up some of the Auto Gain Control cards I see floating around?  Would be cool to have strategically placed thru-holes on it to hook up some
>       of the pan-adapters I've seen around as well.
>
>       Anyway, this seems like a pretty good evolution of this radio!
>

--
Rick Green  N8BJX

We, the People of the United States of America, reject the U.S. Supreme Court's
  Citizens United ruling, and move to amend our Constitution to firmly establish
  that money is not speech, and that human beings, not corporations, are persons
                        entitled to constitutional rights.

                        http://www.MoveToAmend.org






--
Dale Hardin
Elberta, AL 

--
Dale Hardin, KS4NS
Elberta, AL

Re: bitx v6 is here

Ashhar Farhan
 

We have left the old traces, connectors etc in exactly the same place. The software is backwards compatible with the previous versions. If your board has 12 mhz, you have to just edit that one line to change the second IF.
I have also written a new calibration rountine that makes it easy to calibrate without needing any instrumentation in the shack. You set the dial to the frequency of a known station, get into calibration mode, and then keep spinning the tuning knob until you are zero-beat with the known signal.
73, f

On Sat 14 Dec, 2019, 4:43 AM Rick Green, <rtg@...> wrote:
What I think he meant, and what I was wondering, is whether you added any new
thru-holes for easier imstallation of some common mods.
   Specifically, the tx/rx LEDs that came with the custom case kit, and the N8DAH
AGC board.  Have you designed in thru-holes and solder jumper so that these can
be installed without having to scrape, cut and solder the fine traces?

On Fri, 13 Dec 2019, Ashhar Farhan wrote:

> All the cables and connectors of v5 are preserved as it. The only thing you need to do is to swap the 16x2 LCD for a tft display.Unfortunately, we are selling the boxes only as a part of the kit. These
> boxes are so heavy that the extra money is mostlt the freight charge.
>
> On Fri 13 Dec, 2019, 10:27 PM Cory King, <cory@...> wrote:
>
>       What I'm wondering is, now that all the connectors are soldered into the board, will the v6 board have thru-holes on it to solder in audio cables?  That way it is easy to hook up all those
>       soundcard daughterboards for digital modes and/or hook up some of the Auto Gain Control cards I see floating around?  Would be cool to have strategically placed thru-holes on it to hook up some
>       of the pan-adapters I've seen around as well.
>
>       Anyway, this seems like a pretty good evolution of this radio!
>

--
Rick Green  N8BJX

We, the People of the United States of America, reject the U.S. Supreme Court's
  Citizens United ruling, and move to amend our Constitution to firmly establish
  that money is not speech, and that human beings, not corporations, are persons
                        entitled to constitutional rights.

                        http://www.MoveToAmend.org




Re: uBitx V5 For sale

flymustangs@...
 

It’s sold.

Re: uBITX CW offset woes

W2CTX
 

I think there is an option in the CEC Memory Manager to
direct which should be displayed Rx or Tx.

On December 13, 2019 at 3:56 PM "Bill Meara via Groups.Io" <n2cqr=yahoo.com@groups.io> wrote:


I'm trying to get my Version 3 uBITX with CEC version 1.071 to work properly in CW mode.  I have the same problem that Vic WA4THR had -- I really prefer just to have the display show the transmit frequency, with the receiver shifting to produce the desired CW tone.  That is not what happens under ver 1.071.   When the dial indicates 7.0407, I am actually transmitting on 7.0399. Is there anyway I can easily correct this without a major software overhaul?  I am still running uBITX v 3 with a 16x2 display. 
Thanks,  Bill N2CQR


Re: uBITX CW offset woes

W2CTX
 

This topic has been discussed xxxx times on this reflector:

https://www.youtube.com/watch?v=CrC7JmNw1eY

On December 13, 2019 at 8:40 PM "Bill Meara via Groups.Io" <n2cqr=yahoo.com@groups.io> wrote:


Interesting topic. I guess I'm just more accustomed to having the rig display the TX freq and shift the RX to make it audible.   But in uBITX CWU and CWL the display is the RX freq with the TX freq shifted.  So tonight I'm in CWL and I hear SKCC stations at 7.0557.  They are really at their normal spot at 7.0550.    I call them.  They hear me because my transmit freq has gone down to theirs.  So it all works but it is just a bit different. Actually I'm a lot more accustomed to setting up SSB rigs -- on all my rigs the display freq is where the carried would have been -- LSB extends down from there, USB up from there.  Easier.   Setting up CW offset with a Direct Conversion receiver is also a bit of a challenge:  If you are tuning to the high side of zero beat you need your TX frequency to drop down by 700 Hz or so.  This is how it works in a Heath HW-8. 
I understand it is possible to change the display in the uBITX so that it shows transmit frequency.  But this may involve some painful (for me) wrestling with the Arduino IDE, Memory Manager and the new CEC software.  So I may leave well-enough alone.  Unless someone can tell me how to do this EASILY. 
Here is a good discussion of the problem we've been talking about: 
https://groups.io/g/BITX20/topic/22981497
And here is an ARRL forum discussion that talks about how different manufacturers handle this.   
Forum » CW operating and technical techniques » CWL and CWU

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Forum » CW operating and technical techniques » CWL and CWU

The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the...
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73  Bill N2CQR






On Friday, December 13, 2019, 07:55:04 PM EST, Gordon Gibby <docvacuumtubes@...> wrote:

I’ll have to look back at the code to see how the MicroBitx  works,   But after dealing with this at last field day, I wrote a document on how my ICOM works.
It may not be quite what you thought!
https://qsl.net/nf4rc/2019/ReceivingCW.pdf
(and I’m pretty sure that’s how my Heathkit SB 102 always worked ) On the ICOM also, when you transmit, you weren’t transmitting zero- beated with your dial frequency.   As I explained earlier, you would not want to be.   It’s all a matter of understanding how your rig works 
I’ll go back and look at the code on the uBitx and see how it works.  


On Dec 13, 2019, at 19:43, Bill Cromwell <wrcromwell@...> wrote:


Hi,

I have always preferred my dial to show my my TX carrier frequency whether or not it is suppressed. There are fiducial marks to show where to set for receive (USB or LSB). WWV is double sideband, full carrier AM (not SSB or CW) and yes it will be zero beated when you are zeroed with it's carrier. SSB and CW require a tiny amount more effort. If you operate near the (sub)band edge pay closer attention.

Transceivers are more often setup for the dial to to show the center of the SSB passband and often considered to 1500 Hz from the (suppressed) carrier.

In the end, you have to know how the radio you are using is configured. Either way (tx or rx reading) will work but if you are not aware which way your radio works you could transmit outside your license assignment. Your entire emitted signal is supposed to remain inside those prescribed band edges.

Merry Christmas and..

73,

Bill  KU8H

On 12/13/19 5:34 PM, Gordon Gibby wrote:

When I get a chance, I'll check one of my icom's and see what I do, but I suspect many rigs work exactly this way, so that it becomes easy to be right on frequency of the other station, and also hear WWV zero beat precisely at 10.000000 MHz.   If they worked some other way, WWV would not zero beat at 10.000000, or alternatively you would not be transmitting on the same frequency as the CW station you had put in the ccenter of your audio filter passband.


On Fri, Dec 13, 2019 at 5:24 PM Gordon Gibby via Groups.Io <docvacuumtubes=gmail.com@groups.io <mailto:gmail.com@groups.io>> wrote:


   well, you might be right, but when you zero beat a heathkit to a 100


   kHz marker, and subsequently tune in a CW signal, you will be


   transmitting on a DIFFERENT frequency from what your dial shows.       So I don't think you are correct for a heathkit SB-102, which I used


   for many many years....and still have


   On Fri, Dec 13, 2019 at 5:11 PM Bill Meara via Groups.Io


   <n2cqr=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:


       Usually the freq readout on the display IS the transmit


       frequency, with the offset taking place in the receiver -- the


       receiver shifts the 700 Hz or so.   But here the transmit


       frequency shifts.  That is kind of weird.   As Vic points out:


       I just finished my V4 uBitX with CEC 1.10 firmware and the V3


       Nextion GUI. I think the method of offsetting the transmit


       frequency is backwards to how CW offset should be done. Although


       this works, it can have bad consequences. If the other station


       is transmitting on 14.100 I will not hear him unless I tune the


       uBitX to 14.099300 if I am particular about hearing a 700Hz tone


       and I am using CWU, so that means I actually will be


       transmitting on 14.100 when I send back and he will hear me.


       Similarly, if I have selected CWL I won’t hear him until I set


       the receiver to 14.100700 and I will be transmitting back on his


       frequency. However, we should be indicating the actual transmit


       frequency, not where I have offset to hear the other station. If


       I was close to the lower band edge, and I wanted to call CQ on


       14.000500, I would actually be transmitting 200Hz below the band


       limit if I have selected CWL mode. Other rigs I have used, even


       Allard’s sketch for the BitX40, offset the receiver by the


       amount of the desired tone (offset), either up or down based on


       if CWU or CWL is selected, so the transmitter always is sending


       on the dial frequency.


       On Friday, December 13, 2019, 04:38:21 PM EST, Gordon Gibby


       <docvacuumtubes@... <mailto:docvacuumtubes@...>> wrote:


       So, when you do CW, you don't zero beat your RECEIVER to the


       other station, do you?


       No.


       You dial your receiver just the right amount off from the other


       station's zero beat so that either (a) you are set so that your


       transmitter will be on the other station's frequency and you can


       hear a nice tone from the other station or


       (b) if you have a very narrow filter, you do (a) as well, but


       you adjust so that the other station is PEAKED in your passband.


       Either way.....you are NOT transmitting precisely where your


       dial says....because typically you are offset by about 800 Hz.


       Precisely what you observed.


       Maybe that makes more sense?


       My heathkit works the same way.


       Gordon


       On Fri, Dec 13, 2019 at 3:57 PM Bill Meara via Groups.Io


       <n2cqr=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:


           I'm trying to get my Version 3 uBITX with CEC version 1.071


           to work properly in CW mode.  I have the same problem that


           Vic WA4THR had -- I really prefer just to have the display


           show the transmit frequency, with the receiver shifting to


           produce the desired CW tone.  That is not what happens under


           ver 1.071.   When the dial indicates 7.0407, I am actually


           transmitting on 7.0399.


           Is there anyway I can easily correct this without a major


           software overhaul?  I am still running uBITX v 3 with a 16x2


           display.


           Thanks,  Bill N2CQR


--
bark less - wag more







Re: uBITX CW offset woes

Gordon Gibby
 

Thanks!   


On Dec 13, 2019, at 20:40, Bill Meara via Groups.Io <n2cqr@...> wrote:

Interesting topic. I guess I'm just more accustomed to having the rig display the TX freq and shift the RX to make it audible.   But in uBITX CWU and CWL the display is the RX freq with the TX freq shifted.  So tonight I'm in CWL and I hear SKCC stations at 7.0557.  They are really at their normal spot at 7.0550.    I call them.  They hear me because my transmit freq has gone down to theirs.  So it all works but it is just a bit different. Actually I'm a lot more accustomed to setting up SSB rigs -- on all my rigs the display freq is where the carried would have been -- LSB extends down from there, USB up from there.  Easier.   Setting up CW offset with a Direct Conversion receiver is also a bit of a challenge:  If you are tuning to the high side of zero beat you need your TX frequency to drop down by 700 Hz or so.  This is how it works in a Heath HW-8. 

I understand it is possible to change the display in the uBITX so that it shows transmit frequency.  But this may involve some painful (for me) wrestling with the Arduino IDE, Memory Manager and the new CEC software.  So I may leave well-enough alone.  Unless someone can tell me how to do this EASILY. 

Here is a good discussion of the problem we've been talking about: 


And here is an ARRL forum discussion that talks about how different manufacturers handle this.   


On Friday, December 13, 2019, 07:55:04 PM EST, Gordon Gibby <docvacuumtubes@...> wrote:


I’ll have to look back at the code to see how the MicroBitx  works,   But after dealing with this at last field day, I wrote a document on how my ICOM works.

It may not be quite what you thought!


(and I’m pretty sure that’s how my Heathkit SB 102 always worked ) On the ICOM also, when you transmit, you weren’t transmitting zero- beated with your dial frequency.   As I explained earlier, you would not want to be.   It’s all a matter of understanding how your rig works 

I’ll go back and look at the code on the uBitx and see how it works.  


On Dec 13, 2019, at 19:43, Bill Cromwell <wrcromwell@...> wrote:

Hi,

I have always preferred my dial to show my my TX carrier frequency whether or not it is suppressed. There are fiducial marks to show where to set for receive (USB or LSB). WWV is double sideband, full carrier AM (not SSB or CW) and yes it will be zero beated when you are zeroed with it's carrier. SSB and CW require a tiny amount more effort. If you operate near the (sub)band edge pay closer attention.

Transceivers are more often setup for the dial to to show the center of the SSB passband and often considered to 1500 Hz from the (suppressed) carrier.

In the end, you have to know how the radio you are using is configured. Either way (tx or rx reading) will work but if you are not aware which way your radio works you could transmit outside your license assignment. Your entire emitted signal is supposed to remain inside those prescribed band edges.

Merry Christmas and..

73,

Bill  KU8H

On 12/13/19 5:34 PM, Gordon Gibby wrote:
When I get a chance, I'll check one of my icom's and see what I do, but I suspect many rigs work exactly this way, so that it becomes easy to be right on frequency of the other station, and also hear WWV zero beat precisely at 10.000000 MHz.   If they worked some other way, WWV would not zero beat at 10.000000, or alternatively you would not be transmitting on the same frequency as the CW station you had put in the ccenter of your audio filter passband.
On Fri, Dec 13, 2019 at 5:24 PM Gordon Gibby via Groups.Io <docvacuumtubes@... <mailto:gmail.com@groups.io>> wrote:
   well, you might be right, but when you zero beat a heathkit to a 100
   kHz marker, and subsequently tune in a CW signal, you will be
   transmitting on a DIFFERENT frequency from what your dial shows.       So I don't think you are correct for a heathkit SB-102, which I used
   for many many years....and still have
   On Fri, Dec 13, 2019 at 5:11 PM Bill Meara via Groups.Io
   <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
       Usually the freq readout on the display IS the transmit
       frequency, with the offset taking place in the receiver -- the
       receiver shifts the 700 Hz or so.   But here the transmit
       frequency shifts.  That is kind of weird.   As Vic points out:
       I just finished my V4 uBitX with CEC 1.10 firmware and the V3
       Nextion GUI. I think the method of offsetting the transmit
       frequency is backwards to how CW offset should be done. Although
       this works, it can have bad consequences. If the other station
       is transmitting on 14.100 I will not hear him unless I tune the
       uBitX to 14.099300 if I am particular about hearing a 700Hz tone
       and I am using CWU, so that means I actually will be
       transmitting on 14.100 when I send back and he will hear me.
       Similarly, if I have selected CWL I won’t hear him until I set
       the receiver to 14.100700 and I will be transmitting back on his
       frequency. However, we should be indicating the actual transmit
       frequency, not where I have offset to hear the other station. If
       I was close to the lower band edge, and I wanted to call CQ on
       14.000500, I would actually be transmitting 200Hz below the band
       limit if I have selected CWL mode. Other rigs I have used, even
       Allard’s sketch for the BitX40, offset the receiver by the
       amount of the desired tone (offset), either up or down based on
       if CWU or CWL is selected, so the transmitter always is sending
       on the dial frequency.
       On Friday, December 13, 2019, 04:38:21 PM EST, Gordon Gibby
       <docvacuumtubes@... <mailto:docvacuumtubes@...>> wrote:
       So, when you do CW, you don't zero beat your RECEIVER to the
       other station, do you?
       No.
       You dial your receiver just the right amount off from the other
       station's zero beat so that either (a) you are set so that your
       transmitter will be on the other station's frequency and you can
       hear a nice tone from the other station or
       (b) if you have a very narrow filter, you do (a) as well, but
       you adjust so that the other station is PEAKED in your passband.
       Either way.....you are NOT transmitting precisely where your
       dial says....because typically you are offset by about 800 Hz.
       Precisely what you observed.
       Maybe that makes more sense?
       My heathkit works the same way.
       Gordon
       On Fri, Dec 13, 2019 at 3:57 PM Bill Meara via Groups.Io
       <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
           I'm trying to get my Version 3 uBITX with CEC version 1.071
           to work properly in CW mode.  I have the same problem that
           Vic WA4THR had -- I really prefer just to have the display
           show the transmit frequency, with the receiver shifting to
           produce the desired CW tone.  That is not what happens under
           ver 1.071.   When the dial indicates 7.0407, I am actually
           transmitting on 7.0399.
           Is there anyway I can easily correct this without a major
           software overhaul?  I am still running uBITX v 3 with a 16x2
           display.
           Thanks,  Bill N2CQR

--
bark less - wag more



Re: uBITX CW offset woes

Bill Meara
 

Interesting topic. I guess I'm just more accustomed to having the rig display the TX freq and shift the RX to make it audible.   But in uBITX CWU and CWL the display is the RX freq with the TX freq shifted.  So tonight I'm in CWL and I hear SKCC stations at 7.0557.  They are really at their normal spot at 7.0550.    I call them.  They hear me because my transmit freq has gone down to theirs.  So it all works but it is just a bit different. Actually I'm a lot more accustomed to setting up SSB rigs -- on all my rigs the display freq is where the carried would have been -- LSB extends down from there, USB up from there.  Easier.   Setting up CW offset with a Direct Conversion receiver is also a bit of a challenge:  If you are tuning to the high side of zero beat you need your TX frequency to drop down by 700 Hz or so.  This is how it works in a Heath HW-8. 

I understand it is possible to change the display in the uBITX so that it shows transmit frequency.  But this may involve some painful (for me) wrestling with the Arduino IDE, Memory Manager and the new CEC software.  So I may leave well-enough alone.  Unless someone can tell me how to do this EASILY. 

Here is a good discussion of the problem we've been talking about: 


And here is an ARRL forum discussion that talks about how different manufacturers handle this.   


On Friday, December 13, 2019, 07:55:04 PM EST, Gordon Gibby <docvacuumtubes@...> wrote:


I’ll have to look back at the code to see how the MicroBitx  works,   But after dealing with this at last field day, I wrote a document on how my ICOM works.

It may not be quite what you thought!


(and I’m pretty sure that’s how my Heathkit SB 102 always worked ) On the ICOM also, when you transmit, you weren’t transmitting zero- beated with your dial frequency.   As I explained earlier, you would not want to be.   It’s all a matter of understanding how your rig works 

I’ll go back and look at the code on the uBitx and see how it works.  


On Dec 13, 2019, at 19:43, Bill Cromwell <wrcromwell@...> wrote:

Hi,

I have always preferred my dial to show my my TX carrier frequency whether or not it is suppressed. There are fiducial marks to show where to set for receive (USB or LSB). WWV is double sideband, full carrier AM (not SSB or CW) and yes it will be zero beated when you are zeroed with it's carrier. SSB and CW require a tiny amount more effort. If you operate near the (sub)band edge pay closer attention.

Transceivers are more often setup for the dial to to show the center of the SSB passband and often considered to 1500 Hz from the (suppressed) carrier.

In the end, you have to know how the radio you are using is configured. Either way (tx or rx reading) will work but if you are not aware which way your radio works you could transmit outside your license assignment. Your entire emitted signal is supposed to remain inside those prescribed band edges.

Merry Christmas and..

73,

Bill  KU8H

On 12/13/19 5:34 PM, Gordon Gibby wrote:
When I get a chance, I'll check one of my icom's and see what I do, but I suspect many rigs work exactly this way, so that it becomes easy to be right on frequency of the other station, and also hear WWV zero beat precisely at 10.000000 MHz.   If they worked some other way, WWV would not zero beat at 10.000000, or alternatively you would not be transmitting on the same frequency as the CW station you had put in the ccenter of your audio filter passband.
On Fri, Dec 13, 2019 at 5:24 PM Gordon Gibby via Groups.Io <docvacuumtubes@... <mailto:gmail.com@groups.io>> wrote:
   well, you might be right, but when you zero beat a heathkit to a 100
   kHz marker, and subsequently tune in a CW signal, you will be
   transmitting on a DIFFERENT frequency from what your dial shows.       So I don't think you are correct for a heathkit SB-102, which I used
   for many many years....and still have
   On Fri, Dec 13, 2019 at 5:11 PM Bill Meara via Groups.Io
   <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
       Usually the freq readout on the display IS the transmit
       frequency, with the offset taking place in the receiver -- the
       receiver shifts the 700 Hz or so.   But here the transmit
       frequency shifts.  That is kind of weird.   As Vic points out:
       I just finished my V4 uBitX with CEC 1.10 firmware and the V3
       Nextion GUI. I think the method of offsetting the transmit
       frequency is backwards to how CW offset should be done. Although
       this works, it can have bad consequences. If the other station
       is transmitting on 14.100 I will not hear him unless I tune the
       uBitX to 14.099300 if I am particular about hearing a 700Hz tone
       and I am using CWU, so that means I actually will be
       transmitting on 14.100 when I send back and he will hear me.
       Similarly, if I have selected CWL I won’t hear him until I set
       the receiver to 14.100700 and I will be transmitting back on his
       frequency. However, we should be indicating the actual transmit
       frequency, not where I have offset to hear the other station. If
       I was close to the lower band edge, and I wanted to call CQ on
       14.000500, I would actually be transmitting 200Hz below the band
       limit if I have selected CWL mode. Other rigs I have used, even
       Allard’s sketch for the BitX40, offset the receiver by the
       amount of the desired tone (offset), either up or down based on
       if CWU or CWL is selected, so the transmitter always is sending
       on the dial frequency.
       On Friday, December 13, 2019, 04:38:21 PM EST, Gordon Gibby
       <docvacuumtubes@... <mailto:docvacuumtubes@...>> wrote:
       So, when you do CW, you don't zero beat your RECEIVER to the
       other station, do you?
       No.
       You dial your receiver just the right amount off from the other
       station's zero beat so that either (a) you are set so that your
       transmitter will be on the other station's frequency and you can
       hear a nice tone from the other station or
       (b) if you have a very narrow filter, you do (a) as well, but
       you adjust so that the other station is PEAKED in your passband.
       Either way.....you are NOT transmitting precisely where your
       dial says....because typically you are offset by about 800 Hz.
       Precisely what you observed.
       Maybe that makes more sense?
       My heathkit works the same way.
       Gordon
       On Fri, Dec 13, 2019 at 3:57 PM Bill Meara via Groups.Io
       <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
           I'm trying to get my Version 3 uBITX with CEC version 1.071
           to work properly in CW mode.  I have the same problem that
           Vic WA4THR had -- I really prefer just to have the display
           show the transmit frequency, with the receiver shifting to
           produce the desired CW tone.  That is not what happens under
           ver 1.071.   When the dial indicates 7.0407, I am actually
           transmitting on 7.0399.
           Is there anyway I can easily correct this without a major
           software overhaul?  I am still running uBITX v 3 with a 16x2
           display.
           Thanks,  Bill N2CQR

--
bark less - wag more



Re: uBITX CW offset woes

Gordon Gibby
 

Aargh.  I may be wrong here!   If I am, my apologies, it makes my head spin a bit.   I’ll have to go fiddle with the radio and try it out.  


On Dec 13, 2019, at 19:54, Gordon Gibby via Groups.Io <docvacuumtubes@...> wrote:

I’ll have to look back at the code to see how the MicroBitx  works,   But after dealing with this at last field day, I wrote a document on how my ICOM works.

It may not be quite what you thought!


(and I’m pretty sure that’s how my Heathkit SB 102 always worked ) On the ICOM also, when you transmit, you weren’t transmitting zero- beated with your dial frequency.   As I explained earlier, you would not want to be.   It’s all a matter of understanding how your rig works 

I’ll go back and look at the code on the uBitx and see how it works.  


On Dec 13, 2019, at 19:43, Bill Cromwell <wrcromwell@...> wrote:

Hi,

I have always preferred my dial to show my my TX carrier frequency whether or not it is suppressed. There are fiducial marks to show where to set for receive (USB or LSB). WWV is double sideband, full carrier AM (not SSB or CW) and yes it will be zero beated when you are zeroed with it's carrier. SSB and CW require a tiny amount more effort. If you operate near the (sub)band edge pay closer attention.

Transceivers are more often setup for the dial to to show the center of the SSB passband and often considered to 1500 Hz from the (suppressed) carrier.

In the end, you have to know how the radio you are using is configured. Either way (tx or rx reading) will work but if you are not aware which way your radio works you could transmit outside your license assignment. Your entire emitted signal is supposed to remain inside those prescribed band edges.

Merry Christmas and..

73,

Bill  KU8H

On 12/13/19 5:34 PM, Gordon Gibby wrote:
When I get a chance, I'll check one of my icom's and see what I do, but I suspect many rigs work exactly this way, so that it becomes easy to be right on frequency of the other station, and also hear WWV zero beat precisely at 10.000000 MHz.   If they worked some other way, WWV would not zero beat at 10.000000, or alternatively you would not be transmitting on the same frequency as the CW station you had put in the ccenter of your audio filter passband.
On Fri, Dec 13, 2019 at 5:24 PM Gordon Gibby via Groups.Io <docvacuumtubes@... <mailto:gmail.com@groups.io>> wrote:
   well, you might be right, but when you zero beat a heathkit to a 100
   kHz marker, and subsequently tune in a CW signal, you will be
   transmitting on a DIFFERENT frequency from what your dial shows.       So I don't think you are correct for a heathkit SB-102, which I used
   for many many years....and still have
   On Fri, Dec 13, 2019 at 5:11 PM Bill Meara via Groups.Io
   <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
       Usually the freq readout on the display IS the transmit
       frequency, with the offset taking place in the receiver -- the
       receiver shifts the 700 Hz or so.   But here the transmit
       frequency shifts.  That is kind of weird.   As Vic points out:
       I just finished my V4 uBitX with CEC 1.10 firmware and the V3
       Nextion GUI. I think the method of offsetting the transmit
       frequency is backwards to how CW offset should be done. Although
       this works, it can have bad consequences. If the other station
       is transmitting on 14.100 I will not hear him unless I tune the
       uBitX to 14.099300 if I am particular about hearing a 700Hz tone
       and I am using CWU, so that means I actually will be
       transmitting on 14.100 when I send back and he will hear me.
       Similarly, if I have selected CWL I won’t hear him until I set
       the receiver to 14.100700 and I will be transmitting back on his
       frequency. However, we should be indicating the actual transmit
       frequency, not where I have offset to hear the other station. If
       I was close to the lower band edge, and I wanted to call CQ on
       14.000500, I would actually be transmitting 200Hz below the band
       limit if I have selected CWL mode. Other rigs I have used, even
       Allard’s sketch for the BitX40, offset the receiver by the
       amount of the desired tone (offset), either up or down based on
       if CWU or CWL is selected, so the transmitter always is sending
       on the dial frequency.
       On Friday, December 13, 2019, 04:38:21 PM EST, Gordon Gibby
       <docvacuumtubes@... <mailto:docvacuumtubes@...>> wrote:
       So, when you do CW, you don't zero beat your RECEIVER to the
       other station, do you?
       No.
       You dial your receiver just the right amount off from the other
       station's zero beat so that either (a) you are set so that your
       transmitter will be on the other station's frequency and you can
       hear a nice tone from the other station or
       (b) if you have a very narrow filter, you do (a) as well, but
       you adjust so that the other station is PEAKED in your passband.
       Either way.....you are NOT transmitting precisely where your
       dial says....because typically you are offset by about 800 Hz.
       Precisely what you observed.
       Maybe that makes more sense?
       My heathkit works the same way.
       Gordon
       On Fri, Dec 13, 2019 at 3:57 PM Bill Meara via Groups.Io
       <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
           I'm trying to get my Version 3 uBITX with CEC version 1.071
           to work properly in CW mode.  I have the same problem that
           Vic WA4THR had -- I really prefer just to have the display
           show the transmit frequency, with the receiver shifting to
           produce the desired CW tone.  That is not what happens under
           ver 1.071.   When the dial indicates 7.0407, I am actually
           transmitting on 7.0399.
           Is there anyway I can easily correct this without a major
           software overhaul?  I am still running uBITX v 3 with a 16x2
           display.
           Thanks,  Bill N2CQR

--
bark less - wag more



Re: uBITX CW offset woes

Gordon Gibby
 

I’ll have to look back at the code to see how the MicroBitx  works,   But after dealing with this at last field day, I wrote a document on how my ICOM works.

It may not be quite what you thought!


(and I’m pretty sure that’s how my Heathkit SB 102 always worked ) On the ICOM also, when you transmit, you weren’t transmitting zero- beated with your dial frequency.   As I explained earlier, you would not want to be.   It’s all a matter of understanding how your rig works 

I’ll go back and look at the code on the uBitx and see how it works.  


On Dec 13, 2019, at 19:43, Bill Cromwell <wrcromwell@...> wrote:

Hi,

I have always preferred my dial to show my my TX carrier frequency whether or not it is suppressed. There are fiducial marks to show where to set for receive (USB or LSB). WWV is double sideband, full carrier AM (not SSB or CW) and yes it will be zero beated when you are zeroed with it's carrier. SSB and CW require a tiny amount more effort. If you operate near the (sub)band edge pay closer attention.

Transceivers are more often setup for the dial to to show the center of the SSB passband and often considered to 1500 Hz from the (suppressed) carrier.

In the end, you have to know how the radio you are using is configured. Either way (tx or rx reading) will work but if you are not aware which way your radio works you could transmit outside your license assignment. Your entire emitted signal is supposed to remain inside those prescribed band edges.

Merry Christmas and..

73,

Bill  KU8H

On 12/13/19 5:34 PM, Gordon Gibby wrote:
When I get a chance, I'll check one of my icom's and see what I do, but I suspect many rigs work exactly this way, so that it becomes easy to be right on frequency of the other station, and also hear WWV zero beat precisely at 10.000000 MHz.   If they worked some other way, WWV would not zero beat at 10.000000, or alternatively you would not be transmitting on the same frequency as the CW station you had put in the ccenter of your audio filter passband.
On Fri, Dec 13, 2019 at 5:24 PM Gordon Gibby via Groups.Io <docvacuumtubes@... <mailto:gmail.com@groups.io>> wrote:
   well, you might be right, but when you zero beat a heathkit to a 100
   kHz marker, and subsequently tune in a CW signal, you will be
   transmitting on a DIFFERENT frequency from what your dial shows.       So I don't think you are correct for a heathkit SB-102, which I used
   for many many years....and still have
   On Fri, Dec 13, 2019 at 5:11 PM Bill Meara via Groups.Io
   <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
       Usually the freq readout on the display IS the transmit
       frequency, with the offset taking place in the receiver -- the
       receiver shifts the 700 Hz or so.   But here the transmit
       frequency shifts.  That is kind of weird.   As Vic points out:
       I just finished my V4 uBitX with CEC 1.10 firmware and the V3
       Nextion GUI. I think the method of offsetting the transmit
       frequency is backwards to how CW offset should be done. Although
       this works, it can have bad consequences. If the other station
       is transmitting on 14.100 I will not hear him unless I tune the
       uBitX to 14.099300 if I am particular about hearing a 700Hz tone
       and I am using CWU, so that means I actually will be
       transmitting on 14.100 when I send back and he will hear me.
       Similarly, if I have selected CWL I won’t hear him until I set
       the receiver to 14.100700 and I will be transmitting back on his
       frequency. However, we should be indicating the actual transmit
       frequency, not where I have offset to hear the other station. If
       I was close to the lower band edge, and I wanted to call CQ on
       14.000500, I would actually be transmitting 200Hz below the band
       limit if I have selected CWL mode. Other rigs I have used, even
       Allard’s sketch for the BitX40, offset the receiver by the
       amount of the desired tone (offset), either up or down based on
       if CWU or CWL is selected, so the transmitter always is sending
       on the dial frequency.
       On Friday, December 13, 2019, 04:38:21 PM EST, Gordon Gibby
       <docvacuumtubes@... <mailto:docvacuumtubes@...>> wrote:
       So, when you do CW, you don't zero beat your RECEIVER to the
       other station, do you?
       No.
       You dial your receiver just the right amount off from the other
       station's zero beat so that either (a) you are set so that your
       transmitter will be on the other station's frequency and you can
       hear a nice tone from the other station or
       (b) if you have a very narrow filter, you do (a) as well, but
       you adjust so that the other station is PEAKED in your passband.
       Either way.....you are NOT transmitting precisely where your
       dial says....because typically you are offset by about 800 Hz.
       Precisely what you observed.
       Maybe that makes more sense?
       My heathkit works the same way.
       Gordon
       On Fri, Dec 13, 2019 at 3:57 PM Bill Meara via Groups.Io
       <n2cqr@... <mailto:yahoo.com@groups.io>> wrote:
           I'm trying to get my Version 3 uBITX with CEC version 1.071
           to work properly in CW mode.  I have the same problem that
           Vic WA4THR had -- I really prefer just to have the display
           show the transmit frequency, with the receiver shifting to
           produce the desired CW tone.  That is not what happens under
           ver 1.071.   When the dial indicates 7.0407, I am actually
           transmitting on 7.0399.
           Is there anyway I can easily correct this without a major
           software overhaul?  I am still running uBITX v 3 with a 16x2
           display.
           Thanks,  Bill N2CQR

--
bark less - wag more



Re: uBITX CW offset woes

Bill Cromwell
 

Hi,

I have always preferred my dial to show my my TX carrier frequency whether or not it is suppressed. There are fiducial marks to show where to set for receive (USB or LSB). WWV is double sideband, full carrier AM (not SSB or CW) and yes it will be zero beated when you are zeroed with it's carrier. SSB and CW require a tiny amount more effort. If you operate near the (sub)band edge pay closer attention.

Transceivers are more often setup for the dial to to show the center of the SSB passband and often considered to 1500 Hz from the (suppressed) carrier.

In the end, you have to know how the radio you are using is configured. Either way (tx or rx reading) will work but if you are not aware which way your radio works you could transmit outside your license assignment. Your entire emitted signal is supposed to remain inside those prescribed band edges.

Merry Christmas and..

73,

Bill KU8H

On 12/13/19 5:34 PM, Gordon Gibby wrote:
When I get a chance, I'll check one of my icom's and see what I do, but I suspect many rigs work exactly this way, so that it becomes easy to be right on frequency of the other station, and also hear WWV zero beat precisely at 10.000000 MHz.   If they worked some other way, WWV would not zero beat at 10.000000, or alternatively you would not be transmitting on the same frequency as the CW station you had put in the ccenter of your audio filter passband.
On Fri, Dec 13, 2019 at 5:24 PM Gordon Gibby via Groups.Io <docvacuumtubes=gmail.com@groups.io <mailto:gmail.com@groups.io>> wrote:
well, you might be right, but when you zero beat a heathkit to a 100
kHz marker, and subsequently tune in a CW signal, you will be
transmitting on a DIFFERENT frequency from what your dial shows. So I don't think you are correct for a heathkit SB-102, which I used
for many many years....and still have
On Fri, Dec 13, 2019 at 5:11 PM Bill Meara via Groups.Io
<n2cqr=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:
Usually the freq readout on the display IS the transmit
frequency, with the offset taking place in the receiver -- the
receiver shifts the 700 Hz or so.   But here the transmit
frequency shifts.  That is kind of weird.   As Vic points out:
I just finished my V4 uBitX with CEC 1.10 firmware and the V3
Nextion GUI. I think the method of offsetting the transmit
frequency is backwards to how CW offset should be done. Although
this works, it can have bad consequences. If the other station
is transmitting on 14.100 I will not hear him unless I tune the
uBitX to 14.099300 if I am particular about hearing a 700Hz tone
and I am using CWU, so that means I actually will be
transmitting on 14.100 when I send back and he will hear me.
Similarly, if I have selected CWL I won’t hear him until I set
the receiver to 14.100700 and I will be transmitting back on his
frequency. However, we should be indicating the actual transmit
frequency, not where I have offset to hear the other station. If
I was close to the lower band edge, and I wanted to call CQ on
14.000500, I would actually be transmitting 200Hz below the band
limit if I have selected CWL mode. Other rigs I have used, even
Allard’s sketch for the BitX40, offset the receiver by the
amount of the desired tone (offset), either up or down based on
if CWU or CWL is selected, so the transmitter always is sending
on the dial frequency.
On Friday, December 13, 2019, 04:38:21 PM EST, Gordon Gibby
<docvacuumtubes@... <mailto:docvacuumtubes@...>> wrote:
So, when you do CW, you don't zero beat your RECEIVER to the
other station, do you?
No.
You dial your receiver just the right amount off from the other
station's zero beat so that either (a) you are set so that your
transmitter will be on the other station's frequency and you can
hear a nice tone from the other station or
(b) if you have a very narrow filter, you do (a) as well, but
you adjust so that the other station is PEAKED in your passband.
Either way.....you are NOT transmitting precisely where your
dial says....because typically you are offset by about 800 Hz.
Precisely what you observed.
Maybe that makes more sense?
My heathkit works the same way.
Gordon
On Fri, Dec 13, 2019 at 3:57 PM Bill Meara via Groups.Io
<n2cqr=yahoo.com@groups.io <mailto:yahoo.com@groups.io>> wrote:
I'm trying to get my Version 3 uBITX with CEC version 1.071
to work properly in CW mode.  I have the same problem that
Vic WA4THR had -- I really prefer just to have the display
show the transmit frequency, with the receiver shifting to
produce the desired CW tone.  That is not what happens under
ver 1.071.   When the dial indicates 7.0407, I am actually
transmitting on 7.0399.
Is there anyway I can easily correct this without a major
software overhaul?  I am still running uBITX v 3 with a 16x2
display.
Thanks,  Bill N2CQR
--
bark less - wag more

For Sale - unbuilt Bitx40, uBitx Kits

Ken Hansen
 

Hello all,

I've got two unbuilt/unattempted kits for sale. Both kits are as packed by HFSIGNALS.

First up, an unbuilt Bitx40 from Dec. 2016, 2x speakers and an undrilled case from Amazon (blue & white) sold as kit, looking for $75 shipped ConUS.

Second, I have an unbuilt uBitx from Feb. 2019, asking $125 shipped ConUS.

Both kits have original invoice from HFSIGNALS.

PayPal accepted, email me direct with any questions.

Thanks,

Ken Hansen, N2VIP

Re: bitx v6 is here

Rick Green
 

What I think he meant, and what I was wondering, is whether you added any new thru-holes for easier imstallation of some common mods.
Specifically, the tx/rx LEDs that came with the custom case kit, and the N8DAH AGC board. Have you designed in thru-holes and solder jumper so that these can be installed without having to scrape, cut and solder the fine traces?

On Fri, 13 Dec 2019, Ashhar Farhan wrote:

All the cables and connectors of v5 are preserved as it. The only thing you need to do is to swap the 16x2 LCD for a tft display.Unfortunately, we are selling the boxes only as a part of the kit. These
boxes are so heavy that the extra money is mostlt the freight charge.
On Fri 13 Dec, 2019, 10:27 PM Cory King, <cory@...> wrote:

What I'm wondering is, now that all the connectors are soldered into the board, will the v6 board have thru-holes on it to solder in audio cables?  That way it is easy to hook up all those
soundcard daughterboards for digital modes and/or hook up some of the Auto Gain Control cards I see floating around?  Would be cool to have strategically placed thru-holes on it to hook up some
of the pan-adapters I've seen around as well.

Anyway, this seems like a pretty good evolution of this radio!
--
Rick Green N8BJX

We, the People of the United States of America, reject the U.S. Supreme Court's
Citizens United ruling, and move to amend our Constitution to firmly establish
that money is not speech, and that human beings, not corporations, are persons
entitled to constitutional rights.

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