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Bob, The one possibility might be the switching diodes are not on.? Can you verify that D1 and D4 are on and the other 4 off?? The way that I do it is to measure the voltage on the cathode (band

Hi Bob, you? might try a dummy load and see if it clears up.? Steve KY4GX. Glory to God in the highest, and on earth peace, good will toward men. Luke 2:14

Bob, Is the QDX LED blinking with the newer firmware version 1_01c?? that makes a big difference. 73 Evan AC9TU

Info: Windows 10 firmware 1.01a then 1.01c 12 v - 3:2 T1 Adjustable bench linear supply set at 12 volts,? 1.5 amps OCP setting, 3 A max from supply Rev 1 board built as designed (to the best of my

Ben, I use one of my older flat-screen TVs with HDMI input for the Raspberry Pi (RPi) monitor and speakers.? The one that I have is 24" 1080p so nice high resolution for the RPi.? The sound is sent

Hans and Evan. Thank you for the quick replies. ?I had not seen that mention of a version 1.01c. ?I will do that. ?I have a Windows 10 laptop and a WinXP desktop. ?Yeah, I know - dated, but the

But any other rig does send RF when clicked on. WSJT-X returns a RED flag when used with QDX, which means the PTT hasn't switched, what is the use of the PTT test in WSJT-X if it doesn't turn GREEN ?

Ian, Since there is no audio being sent to the radio, pressing the PTT button on the WSJT-X radio tab will put the QDX into a flashing once every second LED mode that indicates that the PTT has been

Hello Ian, I assume that you are running the latest firmware: 1_01c?? If so, then the single flash every second would mean that the QDX is not getting an audio tone through the USB audio

Sending the TX or TQ1 command does not send out any RF, you just get the single flash every second as the latest firmware is designed to do.? There would be no audio. 73 Evan AC9TU

The lights are on but no one is home!

Alexander, thanks for the update! Roy WA0YMH <flightsimalex@...> wrote:

Hello Ben, I had the same issue and after Hans's explanation on what is going on in the software I switched to a different platform (went from Windows to Raspberry Pi) and the TX signal appeared.? As

Thanks Hans This terminal emulation etc is a bit new to me, I have PuTTY working but like a man with no arms!! Hopefully you can check it, I think you are using WSJT-X? I got some data in the log file

Hi Ben See my message earlier about 1.01c. And install 1.01c. The diagnostics on the status LED will help understand what's going on. The TX signal on the schematic is more of a "key down". It won't

Hi Ian That must be correct, it just means pressing PTT doesn't generate any audio. Hence no RF. It presumably just activates RX/TX changeover only but doesn't generate RF. I can't check this now...

Sorry Hans To be a bit more specific, the problem is that the QDX won't go into TX when just using WSJT-X, when the PTT is clicked in the WSJT-X RADIO settings window, so the other software is

Thanks for that Angel. The NA5Y link was interesting 73 John M0JBA

I assembled my QDX this week, built for a 9v supply. ?All went well, interfaced with WSJT-X v2.5.1 on Toshiba laptop running up-to-date Windows 10. ?In WSJT-X under settings, the Audio tab shows

Thank's Hans I will go through that. But could you just check the Radio settings in WSJT-X to see if QDX transmits when you click PTT? 73 Ian