The sound input options for WSJT-X are under File>Settings, on the audio tab:  The radio tab has the CAT setup. See the manual linked over on this thread if you're running my software version: /g/BITX20/message/80615 Reed
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Hi Scott,
There are a lot of spots you could be running into issues, but I'll try and highlight the overall approach. Let me know if there are specific parts of this that don't make sense, or need clarification.
Receiving should be pretty straight forward: connect an audio cable from the uBiTX audio output jack to your pink audio input. Once connected, you should be able to receive the audio into a program of your choosing. Just make sure you select the right audio input device!
For transmitting, the wiring is still pretty easy. Take a second stereo 3.5mm jumper cable, and disconnect the ring conductor with a little cable surgery. This disconnects the PTT on the radio side, while leaving the audio input on the tip, and ground on the sleeve. Plug this cable in between your USB green audio output and the radio's microphone/PTT input. Additionally, connect your radio to your computer with? USB, so that you can activate the TX with CAT control. You'll need to configure whatever software you're using to use CAT control for TX, and to send audio to the correct audio device.
Reed
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Re: Killed TX this time...
Peter,
First off, I will assume that it was working at one time.? Since the issue started have you tried CW?? Also, I noted that you have power on 40 meters.? Is it above 7 watts?
If you truly have power on 40 meters and not on any other band then I would look at the LPF relays to verify that they are working.
Just some suggestions and questions.
73
Evan
AC9TU
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Re: Killed TX this time...
Hi,
What was the current draw before re-adjustment?? That would indicate how far off the bias was (but not how balanced they were).
What is an "MJE"?
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Re: Killed TX this time...
I adjusted the bias as per instructions, 470ma baselines and 670ma on key, if I roar into the mic it goes up to 710ma. They did not seem to be massively misaligned.
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Hello everyone.? I'm trying to get my uBITX V6 set up for some digital modes and I'm used to using a SignaLink but with the uBITX I'm trying to use the Sabrent USB Sound Adapter  Unfortunately, I am unable to figure out the settings for it to work. I have not been able to get it to receive or transmit. I'm not sure if it is from the software (WSJTX), the computer or the soundcard settings. Does anyone have any ideas? '72
Aaron Scott
QRPARCI# 16443
GQRP# 16389
4SQRP # 1080
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Re: Killed TX this time...
Hi,
Why should there be voltage across R97?? Unless the gate on the final is blown, there should be no substantial current flowing through R97.
If you didn't turn the bias voltages down to zero before powering up, you may have blown one or both of the new finals already.? The bias voltage is unique to each transistor because the gate cannot be made exactly the same on every single one.? If the bias was set higher that was needed for a transistor, very high current would be allowed from source to drain and this can cause the channel to burn out.
73,
Mark
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Reed,?
Thank you for the excellent code and documentation!?
Take care and 73,
Sean - KM4SFF
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Re: Killed TX this time...
U2 is putting out 5v though on TX.
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Re: Killed TX this time...
Thinking about that but surely I should see something on the meter without doing that ?
Doesn't appear to be voltage across R97 which has me worried.
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Re: Killed TX this time...
They seem to be, they have the dimples at the top corners.
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Re: Killed TX this time...
Are they REAL RD16HHF1¡¯s? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of peter.mccracken@...
Sent: Thursday, July 30, 2020 3:17 PM
To: [email protected]
Subject: [BITX20] Killed TX this time... ? ... so my fun continues!
Running some tests with antenna tuning on the MJE I seem to have blown the finals or I thought I had, no watts on any band except 40m into a dummy load. Replaced the finals with two RD16's as I had wanted to do this anyway. Now testing not getting any output on any band. Note v6 has a second set of holes for the reversed pins.
Checked have 12v on final legs, on TX one gets 3.8v across the legs and the other about 4.2v across the legs.
Confirmed D8 gets 12v on TX on 28MHz and the others D11,D12,D13 all show zero volts which is expected.
Checked drivers and all show circa 0.65V and pre-drivers show 12v.
Reception is working fine but definitely not getting any output, any thoughts on what else I should be checking ?
Thanks! -- ¡_. _._
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Re: Killed TX this time...
Did you retune the biases?
https://www.hfsignals.com/index.php/ubitx-tuneup/
Reed
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... so my fun continues!
Running some tests with antenna tuning on the MJE I seem to have blown the finals or I thought I had, no watts on any band except 40m into a dummy load. Replaced the finals with two RD16's as I had wanted to do this anyway. Now testing not getting any output on any band. Note v6 has a second set of holes for the reversed pins.
Checked have 12v on final legs, on TX one gets 3.8v across the legs and the other about 4.2v across the legs.
Confirmed D8 gets 12v on TX on 28MHz and the others D11,D12,D13 all show zero volts which is expected.
Checked drivers and all show circa 0.65V and pre-drivers show 12v.
Reception is working fine but definitely not getting any output, any thoughts on what else I should be checking ?
Thanks!
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Re: uBITX V6 weird modulation
Grounding of the radio and some cores on the microphone cable may help. ?But make sure the calibration is right first. ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of joshuaclough via groups.io
Sent: Wednesday, July 29, 2020 10:35 PM
To: [email protected]
Subject: Re: [BITX20] uBITX V6 weird modulation ? 
This is what it looks like when I stretch in and out the coiled mic cord.
Vertical lines are when it's stretched.
I don't have to speak in order for it to do this, nor do I see any difference when I speak. So while I can see where this might be a RF on the mic cable issue, wouldn't It still show something when I talk into it?
-- ¡_. _._
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Re: uBITX V6 weird modulation
I would be interested in the value you saved when you finished the second BFO tuning step.? It might be an indication of any issues that may be in the other parts of the radio.
Note: In the stock software, you need to write calibrations and tuning values down as every time you go to tune or calibrate it starts from the same default value.? Reed N's software does not have this issue, as well as correcting what many see as the correct CW operation where the frequency displayed is the actual frequency transmitted.? In the Stock software, the CW signal is offset by the sidetone value.
73
Evan
AC9TU
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Re: uBITX V6 weird modulation
Thanks Evan, I have followed that procedure and I believe it was successful.? But maybe I will do it again.? I tested using Morse as well so a mike issue did not confuse the testing.
Thanks for the prompt reply.? Regards
Owen Vk5fkol
On Thu, 30 Jul 2020, 6:26 pm Evan Hand, < elhandjr@...> wrote: Owen,
I would perform the BFO tuning step (the last one) in Ashhar Farhan's video on BFO tuning.? That is assuming that the CW frequency is correct.? If the frequency is off, then do all 3 steps.
For a v6 the BFO should be somewhere close to 11.056000 MHz (11.059 MHz crystals - 3,000 Hz highest audio frequency expected).? Most will be lower than that for the best audio and carrier suppression.
Note: The first BFO tuning step is to put the response at the lower edge of the audio passband to allow for the best zero beat response to the AM signal.? After the Frequency is set, the BFO then needs to be tuned for the best audio response and carrier suppression.?
73
Evan
AC9TU
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Re: uBITX V6 weird modulation
Owen,
I would perform the BFO tuning step (the last one) in Ashhar Farhan's video on BFO tuning.? That is assuming that the CW frequency is correct.? If the frequency is off, then do all 3 steps.
For a v6 the BFO should be somewhere close to 11.056000 MHz (11.059 MHz crystals - 3,000 Hz highest audio frequency expected).? Most will be lower than that for the best audio and carrier suppression.
Note: The first BFO tuning step is to put the response at the lower edge of the audio passband to allow for the best zero beat response to the AM signal.? After the Frequency is set, the BFO then needs to be tuned for the best audio response and carrier suppression.?
73
Evan
AC9TU
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Re: uBITX V6 weird modulation
I'm using a dummy load on my Ubitx V6.1 and an Sdr as a test. The mike socket seems to be a bit sensitive to mike cable movement when I key and move the mike. I also seem to be getting very low output but my Sdr may not be set up?correctly. So I will check and also fit the suggested capacitors and ferrites. Would ferrites used for antenna balans be suitable. Im a complete newbie. Vk5fkol
On Mon, 27 Jul 2020, 12:41 pm joshuaclough via , <joshuaclough= [email protected]> wrote: 
That's lower sideband. As you can see it's mostly above where it should be.
USB looks just the opposite. CW shows up on the correct side though.
Also, and another biggie here, this is what it looks like when you key the mic, talking into it changes nothing.
Signal above received with an rtl-sdr, no antenna for attenuation (since the transmitting antenna is just out the window).
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Re: uBITX V6 weird modulation
This is what it looks like when I stretch in and out the coiled mic cord.
Vertical lines are when it's stretched.
I don't have to speak in order for it to do this, nor do I see any difference when I speak. So while I can see where this might be a RF on the mic cable issue, wouldn't It still show something when I talk into it?
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Aaron K5ATG
MadRadioModder