Date   

Re: #bitx40help - Unit stuck in transmit #bitx40help

Allard PE1NWL
 


Re: Ubitx average SSB output

Mike aka KC2WVB <rb5363@...>
 

Quick question. I think that what your doing is the following: Presumably the audio from the mic's audio line that carries the ac with a dc offset is first passed through a capacitor to block the dc and then used as input into a small preamp, perhaps an op-amp before anything else occurs. If so, then I imagine by changing the value of the named resistor you are increasing the gain associated with the op-amps behavior and consequently the audio's amplification above that of what otherwise occurs.

If my conjecture is near valid I am wondering if there is another way to do this such as by using a little stand alone pre-amp immediately after the microphone and prior to the assumed dc blocking filter. I only wonder because one could then control the gain and I do not have the right stuff for SMD removal or replacement.

On Fri, May 25, 2018, 8:30 AM iz oos <and2oosiz2@...> wrote:

I have changed just R63 so now it is 24 ohm (I added 2 ordinary 100ohms resistors in parallel) as suggested. I confirm it increases the average power to the right level given the stock mic element. Could it be further decreased, let's say 10 ohms?


Il 27/apr/2018 16:26, "Howard Fidel" <sonic1@...> ha scritto:
1K. Change one or the other, not both.


On 4/27/2018 10:14 AM, iz oos wrote:

If R63=24ohm what value should R65 be?


Il 27/apr/2018 16:03, "Skip Davis via Groups.Io" <skipnc9o=yahoo.com@groups.io> ha scritto:
Howard did you also change out R65 that was posted here too.
By the way the parts showed up here yesterday, thanks a lot. Now to find time to install them.

Skip Davis, NC9O 

On Apr 27, 2018, at 09:57, Howard Fidel <sonic1@...> wrote:

Yes. Change R63 to 24 ohms. The earlier rev boards had 100 ohms there, and V3 has 47. I put another 47 ohm resistor in parallel with the one on the board. Now I don't need to yell into the mic.

Howard WB2VXW


On 4/27/2018 3:22 AM, iz oos wrote:

I have checked SSB output for the Ubitx using a Softrock sdr receiver. The carrier is well aligned and the filter gives a very good shape. Whistling is gives full output with the stock mic element. The output seems clean but the average power during normal speech seems to me a bit low. Is there an easy way to increase it? 73, Franco





Re: Power of rf #ubitx #ubitx-help

Daniel Conklin <danconklin2@...>
 

That is normal.  There are partial solutions available. Read the link I posted in my previous response for some options  


Re: Drop power 20m ! #ubitx #ubitx-help

Daniel Conklin <danconklin2@...>
 

Read the link to the thread I gave you in your previous post and you will learn the reason for this. 


Re: uBITX Firmware CEC Version 1.08 S meter, etc

Jerry Gaffke
 

BFO should be something like 11.9965


On Fri, May 25, 2018 at 02:32 pm, allen west wrote:
My mistake, when in setup/adjust BFO the default is 11.665, my error with the 12.nnn.
 
Al


Re: CW Transmit Frequency VS Sidetone setting #radiuno #ubitx #ubitxcw #firmware

Daniel Conklin <danconklin2@...>
 

When I matched the CW BFO calibration with the USB BFO calibration, then the displayed CW received frequency was the same as the transmit frequency. It was not possible to use a negative number for the side tone, however I did match the side tone to the offset when I moved the CW BFO back. 


Re: #bitx40help - Unit stuck in transmit #bitx40help

Allard PE1NWL
 

Hi Keith,

I believe your Raduino is still OK.
But you probably reversed the collector and emitter of the 2N3904. Please verify that you installed the tranistor correctly.

73 Allard PE1NWL


Re: uBITX Firmware CEC Version 1.08 S meter, etc

allen west
 

My mistake, when in setup/adjust BFO the default is 11.665, my error with the 12.nnn.

Al


On May 25, 2018, at 4:54 PM, Ralph Mowery <rmowery42@...> wrote:

Right off hand I would say the BFO is way off, probably on the wrong sideband so to speak.

It is usually around 11.996.700, some  where around around 11.996 something instead of 12.something.


It may pay you to load in the original software from the ubitx web page.  That should get you close to calibration.

de ku4pt


On Fri, May 25, 2018 at 4:45 PM, allen west <kb4ra67@...> wrote:
Got uBitx set up a couple of weeks ago.  Audio quit, yes, I have the WX chip.  Getting audio from volume control via an external amp.  Made a couple of contacts but got terrible audio reports back.  I have calibration set correctly and get WWV on 10 and 15 MHz. Fine.  I cannot get BFO set.  Every time I think it is set, the station shows 1000 to 1200 cycles below the frequency of the actual station using a K3 as reference.  If I find a station on 7246 and set the dial on uBitx to 7246 and then set the BFO, I will find my station at 7244.8 or close.  I am following the procedure except the radio doesn’t respond tp PTT when in set up mode.  When I press function switch in set BFO, the display reads 12,665 and when I set it where I want it the PTT does nothing so I press function again.  Is that the problem?  Any ideas?

Thanks, Al

KB4RA


_


Re: uBITX Firmware CEC Version 1.08 S meter, etc

Ralph Mowery
 

Right off hand I would say the BFO is way off, probably on the wrong sideband so to speak.

It is usually around 11.996.700, some  where around around 11.996 something instead of 12.something.


It may pay you to load in the original software from the ubitx web page.  That should get you close to calibration.

de ku4pt


On Fri, May 25, 2018 at 4:45 PM, allen west <kb4ra67@...> wrote:
Got uBitx set up a couple of weeks ago.  Audio quit, yes, I have the WX chip.  Getting audio from volume control via an external amp.  Made a couple of contacts but got terrible audio reports back.  I have calibration set correctly and get WWV on 10 and 15 MHz. Fine.  I cannot get BFO set.  Every time I think it is set, the station shows 1000 to 1200 cycles below the frequency of the actual station using a K3 as reference.  If I find a station on 7246 and set the dial on uBitx to 7246 and then set the BFO, I will find my station at 7244.8 or close.  I am following the procedure except the radio doesn’t respond tp PTT when in set up mode.  When I press function switch in set BFO, the display reads 12,665 and when I set it where I want it the PTT does nothing so I press function again.  Is that the problem?  Any ideas?

Thanks, Al

KB4RA


_
_._,_._,_



Re: uBITX Firmware CEC Version 1.08 S meter, etc

allen west
 

Got uBitx set up a couple of weeks ago.  Audio quit, yes, I have the WX chip.  Getting audio from volume control via an external amp.  Made a couple of contacts but got terrible audio reports back.  I have calibration set correctly and get WWV on 10 and 15 MHz. Fine.  I cannot get BFO set.  Every time I think it is set, the station shows 1000 to 1200 cycles below the frequency of the actual station using a K3 as reference.  If I find a station on 7246 and set the dial on uBitx to 7246 and then set the BFO, I will find my station at 7244.8 or close.  I am following the procedure except the radio doesn’t respond tp PTT when in set up mode.  When I press function switch in set BFO, the display reads 12,665 and when I set it where I want it the PTT does nothing so I press function again.  Is that the problem?  Any ideas?

Thanks, Al

KB4RA


On May 25, 2018, at 4:16 PM, Ralph Mowery <rmowery42@...> wrote:

The smeter works fine with the 2 line display.  You will have to go to the memory manager and enable it,and set up the values for each s-unit . Then have some kind of hardware going to the 'new' s-meter pin of the ubitx board.

The first line 100 hz is the step size for each partial turn of the tuning dial.  It will change if you change the step size.  The ST shows that you have the software set for a straight key for cw.  That will change with the enabling of the s-meter as that is about where the s-meter will show up.

de ku4pt


On Fri, May 25, 2018 at 2:48 PM, Rod Davis <km6sn@...> wrote:

Ivo,

if you go to

https://ubitx.net/manual-kd8cec-firmware/

and download the manual for firmware 1.072, all of that is explained.

I believe you must use a 4 line display to get the S meter; see

http://www.hamskey.com/2018/04/various-lcd-support-in-ubitx-with.html

Best Regards,

Rod KM6SN



On 05/25/2018 11:40 AM, aronax37@... wrote:
I just made a firmware upgrade to version 1.08 but I can not see S-meter. What is "100Hz" and "ST" on the first line? Thank you for the explanation.
Ivo



Re: uBITX Firmware CEC Version 1.08 S meter, etc

Ralph Mowery
 

The smeter works fine with the 2 line display.  You will have to go to the memory manager and enable it,and set up the values for each s-unit . Then have some kind of hardware going to the 'new' s-meter pin of the ubitx board.

The first line 100 hz is the step size for each partial turn of the tuning dial.  It will change if you change the step size.  The ST shows that you have the software set for a straight key for cw.  That will change with the enabling of the s-meter as that is about where the s-meter will show up.

de ku4pt


On Fri, May 25, 2018 at 2:48 PM, Rod Davis <km6sn@...> wrote:

Ivo,

if you go to

https://ubitx.net/manual-kd8cec-firmware/

and download the manual for firmware 1.072, all of that is explained.

I believe you must use a 4 line display to get the S meter; see

http://www.hamskey.com/2018/04/various-lcd-support-in-ubitx-with.html

Best Regards,

Rod KM6SN



On 05/25/2018 11:40 AM, aronax37@... wrote:
I just made a firmware upgrade to version 1.08 but I can not see S-meter. What is "100Hz" and "ST" on the first line? Thank you for the explanation.
Ivo



Re: #bitx40 #bitx40

Mike aka KC2WVB <rb5363@...>
 

I would carefully check that the volume potentiometer is wired correctly but I suspect it is the wiring to the headphone jack/receptor that is at issue. 

The ground for the headphone jack/receptor, can't remember its color but think it's black, is soldered to the pin out closest to the surface that the jack/receptor is mounted to. The audio line that carries presumably the ac audio without dc offset connects to both the ring and tip connections on the jack/receptor. I believe the audio wire is brown.

If you look at a typical stereo jack/plug the tip is the furthest section from the wire/cable, the ring is the middle section and the shaft is closest to the wire/cable. This jack/plug itself is a bit confusing unless you insert a TRS plug aka 1/8 stereo jack/plug into the jack/receptor and use a continuity test to see which of the remaining pins are the one's needed.

I am guessing but it sounds to me like you either grounded the audio line or have the wrong pin out associated with the jack/receptor.

I don't think I'd try the microphone until you get the receive audio straightened out. Can't really see the harm in it but why tempt chance.

Best wishes

On Fri, May 25, 2018, 11:24 AM <qonita.salimah@...> wrote:

Hello everyone, I'd already assembly my bitx40, but my receive system didn't show any sound at all. 

I've already make a measurements on the transistor voltage.. The only sound I've heard is a quirk sound, like bird sound when the PTT is pressed. And "zzzz" sound in the speaker. What could go wrong?

Please need your help

Thank you so much


Re: 2 meter bitx possible?

Jerry Gaffke
 

No hits for BGA591, can you give a link?

In some other forum, I recall a conversation between Ashhar and Allison regarding low noise mmic's for a VHF receiver front end.
Can't find it anymore.  Allison had a favorite, quite cheap, extremely low noise figure.
What was that part?

Jerry


On Fri, May 25, 2018 at 11:36 am, Ashhar Farhan wrote:
As an architecture, the ubitx is quite suitable upto 432 MHz. The changes needed would be as follows:
 
1. The front-end mixer would have to be an ADE-1 or and SBL-1. The current tranformers and BAT54s would cut it.
2. We will need a good band pass filter. Above 146 Mhz, stripline/coax filters are more likely candidates.
3. The LNA and power chain will need MMICs. they are cheap and easily ordered from mouser.com. A pair of BGA591 can easily provide the obligatory 5 watts.
 
- f


Re: Need help understanding a line of code in ubitx_si5351.cpp (msxp2 = ...) #radiuno

Jerry Gaffke
 

When I wrote the si5351bx code I had the Bitx40 in mind, and was testing for a high side vfo of 19mhz.
As I recall, that code was accurate to within something a bit worse than 0.1hz for arbitrary frequencies at 19mhz.

On the uBitx, our VFO can be as high as 30+45 mhz. 
We lose accuracy as the frequency goes up, but the uBitx should still tune correctly to within 1 hz or so.
If accuracy is an issue, you probably want to put that 25mhz reference in an oven before worrying about the calculations.

Easy enough to set these calculations up on a full blown computer somewhere, do a comparison
between the fractional math of the si5351bx_setfreq() routine and something more straightforward
in double precision floating point.
As I recall, the si5351bx code held it's own, accuracy got a little bit better with floating point but not by much.
There's only so much precision the si5351 can give us with those 20 bit registers for b and c.
 
Another factor is phase noise, as we go up in frequency that becomes more of an issue.
I have no way to measure it, and no idea at what point it's a problem for the various transmission modes. 
There might be minor improvements to be had with regard to si5351 phase noise.  Going to an integer mode
pll msynth divide might help a little bit but I doubt it would be anything like a factor of two.  Some weird stuff
going on with SiLab's ClockBuilderPro, it doesn't seem to bother with integer mode but does an exhaustive
hunt for low b values in the (a+b/c) selection.  I assume that is done to minimize phase noise.

There's some loose talk here about extending the uBitx to 2m and beyond.
If that takes off we may want to consider a Raduino using the si5338.
Better phase noise figures, better precision, reduced crosstalk, can hit much higher frequencies.

If you want to go crazy, there's the si5340/si5341.  
Goes even higher in freq, lower in phase noise, has an spi bus option for much faster load times.
Primary downside is that it burns a watt or so of 1.8v.

Jerry, KE7ER




On Fri, May 25, 2018 at 10:23 am, David Feldman wrote:
(picking this up from a few weeks ago...)

One follow-up question regarding overflow avoidance method in the SI5351 divider calculation: What is the minimum frequency step size obtained with the ubitx si5351 driver (that is, can you tune a ubitx with 1 Hz steps, or more, or less granular?

Does the pre-shifting code in the driver impact frequency resolution (does it throw away some bits of the desired target frequencies?)

Thanks,


Re: uBITX Firmware CEC Version 1.08 Release #ubitx

Jack, W8TEE
 

You can do that yourself. If you don't know how to change the firmwear, there are a bazillion links online to show you how. May as well learn, as there may be other things you'd like to change down the road. Near line 1200 in setup(), you will find code similar to:

  if (userCallsignLength > 0 && ((userCallsignLength & 0x80) == 0x80)) {
    userCallsignLength = userCallsignLength & 0x7F;
    printLineFromEEPRom(0, 0, 0, userCallsignLength -1, 0); //eeprom to lcd use offset (USER_CALLSIGN_DAT)
    delay(2000UL);        // Increase from 500
  }
  else {
    printLineF(0, F("uBITX v0.20"));
    delay(2000UL);        // Increase from 500
    clearLine2();
  }
 

The line in YELLOW will increase the delay time from a half second to two seconds.

Jack, W8TEE

On Friday, May 25, 2018, 3:01:37 PM EDT, atouk <atouk@...> wrote:


One tiny quibble.

Can you make the version display delay on startup a bit longer.  It flies by too fast to read.


On 5/23/2018 11:40 AM, Ian Lee wrote:
uBITX Firmware CEC Version 1.08 Release

Version 1.08 is the first major release since 1.061
Version 1.08 includes all additions or improvements from 1.07 to 1.07, 1.071, 1.073, 1.075 since 1.061, Version 1.08 has minor fixes in 1.075 (Beta)

Changed name to Version 1.08 in Version 1.075 Beta with minor fixed.

 
1.Receive performance is improved compared to the original firmware or version 1.061
2.ATT function has been added to reduce RF gain (Shift 45Mhz IF)
3.Added the ability to connect SDR. (Low cost RTL-SDR available)
4.Added a protocol to ADC Monitoring in CAT communications
5.Various LCD support, 16x02 Parallel LCD - It is the LCD equipped with uBITX, 16x02 I2C LCD, 20x04 Parallel LCD, 20x04 I2C LCD, 16x02 I2C Dual LCD
6.Added Extended Switch Support
7.Support S Meter - Any S-meter is compatible.
8.Added S-Meter setting assistant to uBITX Manager
9.Add recovery mode (such as Factory Reset)


There have been many other improvements and fixes. More information is available on the blog. 
Please see the link below for details.
 
You can download HEX file and uBITX Manager from the link above. You can also download the source code at https://github.com/phdlee/ubitx and see all the changes I've made so far. If there is a non-critical bug in the public version, I will link to the new firmware in the above blog.
 
--
Ian KD8CEC
kd8cec@...
http://www.hamskey.com 


Drop power 20m ! #ubitx #ubitx-help

حمد المزين <hamad.kalid@...>
 

Hello everyone i have problem with power specialty on the 20m  i try to change the RV1 and i get maximum value 2-2.5watt so i would to know what is the cause of problem !? 


Re: uBITX Firmware CEC Version 1.08 Release #ubitx

atouk
 

One tiny quibble.

Can you make the version display delay on startup a bit longer.  It flies by too fast to read.


On 5/23/2018 11:40 AM, Ian Lee wrote:
uBITX Firmware CEC Version 1.08 Release

Version 1.08 is the first major release since 1.061
Version 1.08 includes all additions or improvements from 1.07 to 1.07, 1.071, 1.073, 1.075 since 1.061, Version 1.08 has minor fixes in 1.075 (Beta)

Changed name to Version 1.08 in Version 1.075 Beta with minor fixed.

 
1.Receive performance is improved compared to the original firmware or version 1.061
2.ATT function has been added to reduce RF gain (Shift 45Mhz IF)
3.Added the ability to connect SDR. (Low cost RTL-SDR available)
4.Added a protocol to ADC Monitoring in CAT communications
5.Various LCD support, 16x02 Parallel LCD - It is the LCD equipped with uBITX, 16x02 I2C LCD, 20x04 Parallel LCD, 20x04 I2C LCD, 16x02 I2C Dual LCD
6.Added Extended Switch Support
7.Support S Meter - Any S-meter is compatible.
8.Added S-Meter setting assistant to uBITX Manager
9.Add recovery mode (such as Factory Reset)


There have been many other improvements and fixes. More information is available on the blog. 
Please see the link below for details.
 
You can download HEX file and uBITX Manager from the link above. You can also download the source code at https://github.com/phdlee/ubitx and see all the changes I've made so far. If there is a non-critical bug in the public version, I will link to the new firmware in the above blog.
 
--
Ian KD8CEC
kd8cec@...
http://www.hamskey.com 


Re: uBITX Firmware CEC Version 1.08 S meter, etc

aronax37@...
 

Thank you Rod.
Ivo, OK2SHI


Re: uBITX Firmware CEC Version 1.08 S meter, etc

Rod Davis
 

Ivo,

if you go to

https://ubitx.net/manual-kd8cec-firmware/

and download the manual for firmware 1.072, all of that is explained.

I believe you must use a 4 line display to get the S meter; see

http://www.hamskey.com/2018/04/various-lcd-support-in-ubitx-with.html

Best Regards,

Rod KM6SN



On 05/25/2018 11:40 AM, aronax37@... wrote:
I just made a firmware upgrade to version 1.08 but I can not see S-meter. What is "100Hz" and "ST" on the first line? Thank you for the explanation.
Ivo


Re: uBITX Firmware CEC Version 1.08 Release #ubitx

aronax37@...
 

I just made a firmware upgrade to version 1.08 but I can not see S-meter. What is "100Hz" and "ST" on the first line? Thank you for the explanation.
Ivo