Date   
Re: Received modulation is good only if IFS is 1400-1810

andrea@...
 

I confirm also the hardware configuration. I run the nextion display and the CEC firmware.

Re: Miswired USB, need help fixing display #ubitx #radiuno

Arv Evans
 

Andrew

It is easy to test a particular digital pin on the Arduino.  Add a resistor and LED to the
suspect pin and modify the "blink.ino" program to do a slow blink on that pin.  If it blinks
the output mode is probably good.  Then set the pin in software for INPUT_PULLUP
and add a switch to ground.  With software reading state of that pin you can see the
state change when you pull it to ground. 

Arv
_._


On Sun, Oct 7, 2018 at 1:40 PM Arv Evans <arvid.evans@...> wrote:
Andrew

Yes, sounds like a new Arduino Nano is in order. 

But if you want to play a bit, why not connect D7 on the LCD to a different digital output on the
Nano and then make the same change in software.  That could prove, or disprove that the
Arduino port is good or bad.  Never give up until all possibilities have been beaten into the
ground!  8-)

Arv
_._


On Sat, Oct 6, 2018 at 9:42 PM Andrew Kasurak <va2qch@...> wrote:
Ok, I've got the raduino in the ubitx with the lcd removed, hooked up to the computer via usb and watching the frequency on wsjtx. I've got probes on RS, E, and D6.  When I spin the frequency knob I capture state changes on those pins. RW is properly low at all times. RS is normal high, E is normal low and has regular pulses to high, D6 is normal low and has long irregular shifts high-low (looks like a data stream).

On another set of captures (I can only probe 4 at a time), I see transitions like data on all data pins EXCEPT d7, which is just at a constant 1v. So I'm guessing that's a problem :)

So I guess I cooked my arduino D8 pin, it's not what I would have expected. I'm going to see if I can get A7 to cover the load, or if I have other pins dead.

Thank you both very much for the help

Re: Miswired USB, need help fixing display #ubitx #radiuno

Arv Evans
 

Andrew

Yes, sounds like a new Arduino Nano is in order. 

But if you want to play a bit, why not connect D7 on the LCD to a different digital output on the
Nano and then make the same change in software.  That could prove, or disprove that the
Arduino port is good or bad.  Never give up until all possibilities have been beaten into the
ground!  8-)

Arv
_._


On Sat, Oct 6, 2018 at 9:42 PM Andrew Kasurak <va2qch@...> wrote:
Ok, I've got the raduino in the ubitx with the lcd removed, hooked up to the computer via usb and watching the frequency on wsjtx. I've got probes on RS, E, and D6.  When I spin the frequency knob I capture state changes on those pins. RW is properly low at all times. RS is normal high, E is normal low and has regular pulses to high, D6 is normal low and has long irregular shifts high-low (looks like a data stream).

On another set of captures (I can only probe 4 at a time), I see transitions like data on all data pins EXCEPT d7, which is just at a constant 1v. So I'm guessing that's a problem :)

So I guess I cooked my arduino D8 pin, it's not what I would have expected. I'm going to see if I can get A7 to cover the load, or if I have other pins dead.

Thank you both very much for the help

Re: uBitx Software Update

Jens / DH1AKY
 

Hi Jens,

not a problem at all: please look here: http://ubitx.net/
Also you find many youtube videos concerning the KD8CEC firmware.
Ian also describes how to install on his blog http://www.hamskey.com/2018/09/ubitx-firmware-cec-version-11-release.html#more
There he provides precompiled hexfiles for easy upload. You don't need the bitx Manager tool at this point.
See http://www.hamskey.com/2018/01/how-to-upgrade-ubitx-firmware.html for installing the firmware.

73 Jens/DH1AKY

Re: IF OUT uBitx sensitivity loss

iz oos
 

I have just measured the sensitivity loss with an AD8307. Q32 instead of amplifying 7-8db it attenuates by the same amount, so total loss is about 15db as I estimated with just the S3 signal generator.


Il 07/ott/2018 15:41, "iz oos" <and2oosiz2@...> ha scritto:

Ah I said C31 but it was between R37 and C32. R37 is between R36 and C32 so what I have done is very close to your suggestion (R36). The strange thing is that I restored without the IF-OUT and I think there is around 15-20db loss. I tested with a small signal generator and the S3 signal I heard well before is now around noise floor.


Il 07/ott/2018 15:10, "Mvs Sarma" <mvssarma@...> ha scritto:
Sorry, I would have said R36. NOT R35



On Sun, Oct 7, 2018 at 5:59 PM iz oos <and2oosiz2@...> wrote:

Using a cheap tester, diode test, between the base and the emitter of Q30, Q31, Q32, Q70 I get around 850. Testing the other way round from the emitter to the base I get 1300 for Q30 and Q31 and nil at Q32 and Q70. Is that normal or is it an indication of a component failure?
Il 07/ott/2018 07:56, "Mvs Sarma" <mvssarma@gmail.com> ha scritto:
>
> You may better use a 0.01uF (10nF) from emitter resistor R35. The output could be taken through a screened cable and used. Only issue would be , if the load side of your add on equipment feeds any singal while in Tx mode, it would interfere the working of Tx.
> All the best
> sarma
>  vu3zmv
>
>  
>
> On Sat, Oct 6, 2018 at 10:56 PM iz oos <and2oosiz2@gmail.com> wrote:
>>
>> I tapped the IF before the 12Mhz IF between R37 and C31. The braid of the short coax was taken at R36. I used a block cap (3000pf) between the R37 and the buffer amp. The buffer amp was between the uBitx, attenuators and the softrock ensemble receiver. The estimated sensitivity loss is around 15-20db. I replaced the TDA2222 without any change. What might have been happened? TX output is fine.
>

Re: Received modulation is good only if IFS is 1400-1810

Dr. Flywheel
 

In my case (ubitx V4 with CEC software) I need to set the IF SHIFT value to 2500 in order to get a very nice audio sound. My VFO and BFO are properly calibrated; therefore it is likely that filter component behavior is responsible for the oscillator frequencies hitting to the side of the 45 MHz and 12 MHz filters. There is a way to compensate for this behavior by adjusting the IF_SHIFTVALUE stored in the EEPROM. At this point, I chose to ignore the problem and just set the IF SHIFT manually, since I do not have time to work on my uBitx software right now.

I wonder if people on this list can tell us what is the EEPROM value stored at the IF_SHIFTVALUE location, for their specific uBitx (if they are using the CEC software).

Thanks,

--Ron    N7FTZ


On Sun, Oct 7, 2018 at 10:41 AM Jens Uhlig <uhlig@...> wrote:
Hi Andrea, 

that is exactly my problem too!
I have to switch on IFS and shift it to the right edge. (On my Nexion Display)

Did not found a solution so far.
Setting up the BFO did not cure the Prob.

73 de DL7JU 
Jens 

*** mobil ***

Am 07.10.2018 um 19:25 schrieb "andrea@..." <andrea@...>:

Hi,
is it normal that I can listen correctly only if the IFS value is around 1400-1810 as value?

Re: Received modulation is good only if IFS is 1400-1810

Jens Uhlig
 

Hi Andrea, 

that is exactly my problem too!
I have to switch on IFS and shift it to the right edge. (On my Nexion Display)

Did not found a solution so far.
Setting up the BFO did not cure the Prob.

73 de DL7JU 
Jens 

*** mobil ***

Am 07.10.2018 um 19:25 schrieb "andrea@..." <andrea@...>:

Hi,
is it normal that I can listen correctly only if the IFS value is around 1400-1810 as value?

Received modulation is good only if IFS is 1400-1810

andrea@...
 

Hi,
is it normal that I can listen correctly only if the IFS value is around 1400-1810 as value?

Re: Miswired USB, need help fixing display #ubitx #radiuno

Skip Davis
 

How about a picture or two showing where you soldered the wires?

Skip Davis, NC9O 

On Oct 7, 2018, at 12:52, Jon Titus, KZ1G <tituskz1g@...> wrote:

Andrew, you wrote, "Ok, so I tried to wire an extra USB port for easy access and managed to hook up USB +5/GND to the usb data lines."  What did you try to connect the added USB port to?  Do you mean in parallel with the Arduino board's USB connector?  Or on the FT232 USB interface chip?  Or to other pins elsewhere (which ones and on what?)?  More info about what you connected +5V and ground to, and pin numbers, could help us find the problem.
--
Jon Titus, KZ1G
Herriman, UT USA

Re: Miswired USB, need help fixing display #ubitx #radiuno

Jon Titus, KZ1G <tituskz1g@...>
 

Andrew, you wrote, "Ok, so I tried to wire an extra USB port for easy access and managed to hook up USB +5/GND to the usb data lines."  What did you try to connect the added USB port to?  Do you mean in parallel with the Arduino board's USB connector?  Or on the FT232 USB interface chip?  Or to other pins elsewhere (which ones and on what?)?  More info about what you connected +5V and ground to, and pin numbers, could help us find the problem.
--
Jon Titus, KZ1G
Herriman, UT USA

Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels #ubitx #ubitx-help

capo358@...
 


Hello Raj

BFO does no affect this "whistling" in my case. I did calibration to 11.996500 after firmware update. I need only  do basic calibration routine (10Hmz) within small home made crystal oscillator .. bud I don't thing that it helps.
@ I'm sorry I don't know that you mean with  "leave only the relevant bits"

Martin, OK5MCA

Re: Miswired USB, need help fixing display #ubitx #radiuno

K5ESS
 

Nano pins A6 and A7 are analog only.  Won’t work as digital output.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Andrew Kasurak
Sent: Saturday, October 6, 2018 10:43 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Miswired USB, need help fixing display #ubitx #radiuno

 

Ok, I've got the raduino in the ubitx with the lcd removed, hooked up to the computer via usb and watching the frequency on wsjtx. I've got probes on RS, E, and D6.  When I spin the frequency knob I capture state changes on those pins. RW is properly low at all times. RS is normal high, E is normal low and has regular pulses to high, D6 is normal low and has long irregular shifts high-low (looks like a data stream).

On another set of captures (I can only probe 4 at a time), I see transitions like data on all data pins EXCEPT d7, which is just at a constant 1v. So I'm guessing that's a problem :)

So I guess I cooked my arduino D8 pin, it's not what I would have expected. I'm going to see if I can get A7 to cover the load, or if I have other pins dead.

Thank you both very much for the help

Re: IF OUT uBitx sensitivity loss

iz oos
 

Ah I said C31 but it was between R37 and C32. R37 is between R36 and C32 so what I have done is very close to your suggestion (R36). The strange thing is that I restored without the IF-OUT and I think there is around 15-20db loss. I tested with a small signal generator and the S3 signal I heard well before is now around noise floor.


Il 07/ott/2018 15:10, "Mvs Sarma" <mvssarma@...> ha scritto:
Sorry, I would have said R36. NOT R35



On Sun, Oct 7, 2018 at 5:59 PM iz oos <and2oosiz2@...> wrote:

Using a cheap tester, diode test, between the base and the emitter of Q30, Q31, Q32, Q70 I get around 850. Testing the other way round from the emitter to the base I get 1300 for Q30 and Q31 and nil at Q32 and Q70. Is that normal or is it an indication of a component failure?
Il 07/ott/2018 07:56, "Mvs Sarma" <mvssarma@gmail.com> ha scritto:
>
> You may better use a 0.01uF (10nF) from emitter resistor R35. The output could be taken through a screened cable and used. Only issue would be , if the load side of your add on equipment feeds any singal while in Tx mode, it would interfere the working of Tx.
> All the best
> sarma
>  vu3zmv
>
>  
>
> On Sat, Oct 6, 2018 at 10:56 PM iz oos <and2oosiz2@gmail.com> wrote:
>>
>> I tapped the IF before the 12Mhz IF between R37 and C31. The braid of the short coax was taken at R36. I used a block cap (3000pf) between the R37 and the buffer amp. The buffer amp was between the uBitx, attenuators and the softrock ensemble receiver. The estimated sensitivity loss is around 15-20db. I replaced the TDA2222 without any change. What might have been happened? TX output is fine.
>

Re: IF OUT uBitx sensitivity loss

MVS Sarma
 

Sorry, I would have said R36. NOT R35



On Sun, Oct 7, 2018 at 5:59 PM iz oos <and2oosiz2@...> wrote:

Using a cheap tester, diode test, between the base and the emitter of Q30, Q31, Q32, Q70 I get around 850. Testing the other way round from the emitter to the base I get 1300 for Q30 and Q31 and nil at Q32 and Q70. Is that normal or is it an indication of a component failure?
Il 07/ott/2018 07:56, "Mvs Sarma" <mvssarma@gmail.com> ha scritto:
>
> You may better use a 0.01uF (10nF) from emitter resistor R35. The output could be taken through a screened cable and used. Only issue would be , if the load side of your add on equipment feeds any singal while in Tx mode, it would interfere the working of Tx.
> All the best
> sarma
>  vu3zmv
>
>  
>
> On Sat, Oct 6, 2018 at 10:56 PM iz oos <and2oosiz2@gmail.com> wrote:
>>
>> I tapped the IF before the 12Mhz IF between R37 and C31. The braid of the short coax was taken at R36. I used a block cap (3000pf) between the R37 and the buffer amp. The buffer amp was between the uBitx, attenuators and the softrock ensemble receiver. The estimated sensitivity loss is around 15-20db. I replaced the TDA2222 without any change. What might have been happened? TX output is fine.
>

Re: µBITX v3 : TX OK but no audio on RX

iz oos
 

I have a similar issue and I posted it yesterday, topic IF-OUT sensitivity loss, I asked whether with the diode test of a ordinary tester is it possible to detect the faulty 2n3904 checking the values of the diode test among the base and the emitter.


Il 06/ott/2018 14:33, "F5PCX" <JeDecr@...> ha scritto:
Hi everyone,
Here is the problem :
- No audio is coming out, no side tone can be heard when keying the transceiver. (headphones or speaker)
- If I press the PTT, whistling strongly in the mike, the power out is OK (10 W on 40 m)
- The same on CW : 10 W out but no side tone.
I would add that we receive here is very strong RTTY station on 10.100 MHz.. I can sometimes hear it in my headphones, but the signal is very very weak, it can hardly been heard.

I suspected U1 (a NJM 2073) and I replaced it by another one and even later by an original TDA 2822... It was exactly the same situation.
When I pull the PTT or key the TX, I can hear the relays clicking.
I'm a very bad technician...  Can someone give me an advice ?

Sorry for my english...
73 - Jean, F5PCX. 

Re: IF OUT uBitx sensitivity loss

iz oos
 

Using a cheap tester, diode test, between the base and the emitter of Q30, Q31, Q32, Q70 I get around 850. Testing the other way round from the emitter to the base I get 1300 for Q30 and Q31 and nil at Q32 and Q70. Is that normal or is it an indication of a component failure?

Il 07/ott/2018 07:56, "Mvs Sarma" <mvssarma@gmail.com> ha scritto:
>
> You may better use a 0.01uF (10nF) from emitter resistor R35. The output could be taken through a screened cable and used. Only issue would be , if the load side of your add on equipment feeds any singal while in Tx mode, it would interfere the working of Tx.
> All the best
> sarma
>  vu3zmv
>
>  
>
> On Sat, Oct 6, 2018 at 10:56 PM iz oos <and2oosiz2@gmail.com> wrote:
>>
>> I tapped the IF before the 12Mhz IF between R37 and C31. The braid of the short coax was taken at R36. I used a block cap (3000pf) between the R37 and the buffer amp. The buffer amp was between the uBitx, attenuators and the softrock ensemble receiver. The estimated sensitivity loss is around 15-20db. I replaced the TDA2222 without any change. What might have been happened? TX output is fine.
>

Re: µBITX v3 : TX OK but no audio on RX

 

Jean,

I suspect the volume control is wired wrongly OR defective.

Raj

At 07-10-18, you wrote:
I suspect Q70 being fried. Has someone an opinion about that ?
73 - Jean.

Re: uBitx Software Update

Mike Woods
 

Bo

There's no magic here ... if you want to have a single USB connection, add a USB hub and an internal sound card in your uBITx, and plug the raduino into the hub.  Works a charm.

Mike ZL1AXG

On 7/10/18 5:00 AM, Bo Barry wrote:
The USB cable on the ubitx only control the frequency and transmit PTT.  The two crisscrossed audio cables do the communication.

On modern rigs like my Icom7300  the USB cable does it all.
Enjoy the digital modes while our sun refuses to give us many spots.  I'm hoping to live until the next peak

Bo W4GHV since '54


--
Mike Woods
mhwoods@...

Re: µBITX v3 : TX OK but no audio on RX

Mike Woods
 

Jean

No CW sidetone suggests something is wrong in the audio stage.  Q70 is used only on RX but not for the sidetone, and I don't think we have had previous reports of issues with this stage.   Have you checked your volume control connections at the pot and in the connection to the board?  Maybe something has come loose?  Connectors not seated correctly?

Mike ZL1AXG

On 7/10/18 9:01 PM, F5PCX wrote:
I suspect Q70 being fried. Has someone an opinion about that ?
73 - Jean.


--
Mike Woods
mhwoods@...

Re: µBITX v3 : TX OK but no audio on RX

F5PCX
 

I suspect Q70 being fried. Has someone an opinion about that ?
73 - Jean.