No transmit audio in WSJT-X

W7OMM

Hello!  I am one among the many who has had problems getting my 6400's TX audio to work with WSJT-X (in my case, v2.1.2).  I am running SmartSDR v3.1.8 in Windows 10.  I have not tried an uninstall and re-install of SmartSDR, but I am willing to do that if I can get detailed instructions.

I have not had much time to play with my 6400 since I got it last spring, but I recall that it worked great in Windows 7 with older versions of all the software involved.  The same PC has had its OS updated to Windows 10 since then.

Here's what I know:

1. DAX blue buttons are enabled both in the slice and on the right of the SmartSDR window.

2. I start Slice-Master v0.10.7c, then start WSJT-X from there.

3. The DAX AUDIO RX 1 and DAX AUDIO TX devices are selected for input and output, respectively, in WSJT-X.

4. When I try to Tune or Enable Transmit in WSJT-X, PTT works - the 6400's power button turns red - but no audio is transmitted, the level is 0.

5. If I change the WSJT-X audio transmit device to the PC speakers, I hear audio.

6. I see no DAX driver errors in the DAX window.

7. What's interesting is that, if I quit WSJT-X and start fldigi from Slice-Master, if I click Tune in fldigi I DO get transmit audio in SmartSDR - ONCE.  After that, if I disable Tune and try to Tune again, the transmit audio level is 0.  I can't quit fldigi normally after that, I have to force it to exit.  (fldigi has the same audio devices set up as WSJT-X does.)

8. I tried a hard reset of the 6400, but that had no effect.  Rebooting the PC, or restarting WSJT-X, also had no effect.

Thanks in advance for any pointers on how to correct this!

73,

Claudia, W7OMM

Wilbur Doolittle

screenshots usually work better

K1UO Larry

Ross (KE4BCN)

W7OMM

Yes, power is at max on that screen.

W7OMM

In the PHNE tab in SmartSDR, I set High Cut to 4000 (it had been 2900).  Still no TX audio.  Thanks, though....

RoyS

W7OMM

bobby

Did you make sure your mic was turned on in windows 10 when its upgraded the default setting is off just a thought.

Geoff AB6BT

??? MIc with WSJT-X ???

RoyS

W7OMM

David Decoons, wo2x

Claudia,

if you are still having problems with WSJT-X TX audio and would like remote assistance I am offering to help via Team Viewer. That way you can see what I am doing.

if you are interested I have time free after 12:30 p.m. Eastern tomorrow or Tuesday.

Contact me at my email listed on QRZ and I can call you.

73
Dave wo2x

W7OMM

Roy,

DAX Panel:  TX button is blue.  The IQ Stream Button #1 was disabled.  I enabled it, and the button turned blue, with a frequency next to it.

With a dummy load and TX Gain in DAX set to 46, WSJT called CQ.  The TX Stream on the DAX panel does change to Transmitting.  There is no output shown on the TX indicator (no red bar).

In SmartSDR, RF Power in the P/CW tab is set to 18 watts.

The way I have been measuring my RF output is to look at the "RF Pwr" bar in the P/CW tab.  It has been 0, with no activity on the SWR bar, for these tests.  I can get activity on both the RF Pwr and SWR bars by clicking on TUNE in SmartSDR.  When I TUNE in SmartSDR, the TX Stream in the DAX panel shows Transmitting, but no output shows there, even there there is RF Pwr in SmartSDR.  (Is that what I should expect?  I'm guessing yes, since no audio is coming in to SmartSDR for TX - SmartSDR is generating the TX signal itself.)

Thanks again,

Claudia, W7OMM

Boyan LZ2BE

RoyS

W7OMM

Yes, it is.

Claudia, W7OMM

W7OMM

W7OMM

Steve W6SDM

I know this thread is a little old, but I am having the same problem as Claudia, i.e., no transmit audio from WSJT-X. My station is a Flex 6300, SmartSDR version 2.7.6, Windows 10. It has been working flawlessly with FT8 for over a year until yesterday. I haven't added any hardware or software but I was following an online tutorial on WSJT-X and I may have accidentally changed something.

I am not getting transmit audio. The radio keys but there's silence. DAX shows streaming on transmit, just a steady line. In an effort to fix the problem and eliminate any DAX driver problems, I upgraded to SmartSDR 2.7. 6. Here are my screen shots:

DAX is set to channel 1 on the Flex. I know I am missing something, I just can't figure out what it is. HELP!

Steve, W6SDM

Steve W6SDM

Oh, and also, the speakers are set to Realtek High Definition Audio, where they've always been.

KD0RC

Hi Steve, it looks like you don't have IQ stream 1 turned on. Click the "1" button in the IQ Streams area of DAX and see if that fixes your problem.

Steve W6SDM

Len, I turned on the IQ stream 1 button and still have the same result.

Steve W6SDM

Also, I don't have any other apps running, i.e., slice master, GridTracker, loggers, etc.

David Decoons, wo2x

Steve,

E-mail me and I’ll send my cell number. I see a couple of things that might be causing your problem.

my call at ARRL dot net

73

Dave wo2x

Erik Carling EI4KF

You have a high cut on TX of 1650Hz but you are trying to TX on 1800Hz. This may not be helping and, for example, I have high cut (for DIGU obviously) at 3100Hz so that the whole TX band + a bit spare is covered.

The RX filter at 2kHz will not affect TX but similarly should cover the band i.e be set to 3kHz.

David Decoons, wo2x

I just got off TeamViewer with Steve. It was indeed the TX high cut set @ 1650 instead of 3000. I also set his radio to Data/pkt in the radio tab so it switches to DIGIU when switching bands in FT8.

73

Dave wo2x

Steve W6SDM

Erik, that was the problem. I just spent some time with David, WO2X, on the phone and he helped me fix that as well as tweak a couple of other things. Thank you very much for the replies and assistance.

Steve, W6SDM

Joe

Steve, please send me your email address; I have the exact same issue and would like to talk to you about it. Joe Mirsky, K5LJB. Email: mirskyjoe@gmail.com.

David Decoons, wo2x

Joe,

contact me at my call at ARRL dot net and I will help.

Dave wo2x