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Charles.? There is no problem in changing supply voltage while the? QDX is on or indeed transmitting.? That is provided you can do this without any spikes that take the voltage above the

Hello Alexander, Sorry to hear that your QDX failed.? Based on what you have described, I believe that Q7 failed when or more of the BS170s failed.? I would be prepared to replace all 5 of the

Hey Willie ( Willie or Will is what my dad, W4MAI,sk 2006 used to call me ). My linear regulated supply is a 15 volt max, 2A max jobby that seems to be working nominally. Presently set for 12 vdc, 1

Power supply capacity? Try a different supply? 73, Willie N1JBJ

Alexander, Sorry that you ran into trouble with your QDX. I think the first place to look is whether or not Q7, the reverse polarity protection FET has shorted to ground. That would give you the low

Mine runs off a raspberry pi. Why not put it at the antenna then just use wifi of the pi to remote desktop into it from a tablet or laptop? David W5CWT

I just bought a pack of 10 (identical ones) for $11 on Amazon. https://www.amazon.com/gp/aw/d/B07XZ88418?psc=1&ref=ppx_pop_mob_b_asin_title David W5CWT [email protected]> wrote:

Thanks fellas but no joy. No rf feedback, no audio processing, all volume settings at max.? 2 repetitive Status LED flashes each time she trips until I stop the xmsn. The thing is, for a quarter of a

I misspoke. I enlarged a washer hole to mount the regular BNC.? 72, Bob KI0G

I had a similar problem.? With metal snips I cut off the circuit board corner where the BNC went, enlarged the case hole to fit a regular BNC and soldered wire from the lead to the center pin

Hi Tony Hi hi, yes you are right, I was having a nice chat with VK5CZ. I think it's the 4th time I've QSO'ed with him on JS8 with my QDX at 5W to OCFD antenna. He uses 50W and a simple dipole at his

Did the last message have a picture attached to it?? If so, it doesn't come up in my browser.? I have been able to follow most of the description of the circuit from the text but a picture of the

I recently built the QCX-mini 40m kit. Being new to kit building, I couldn’t be more thrilled that it works! However, I applied too much heat soldering the BNC female connector. The center pin comes

I connect the QDX to a raspberry pi that is running WSJT-X. The pi is headless and managed from my phone using VNC. Since the pi and QDX are at the base of the antenna during field use (and battery

Thanks for letting me into the group @Hans. I was the source of the JS8 message reminding you to approve new members. ;7) My QDX V3a is more or less working. I need to adjust L12 to resonate at the

Yesterday evening I finished building my QDX and was quite proud of myself, for it was the first 'real' soldering project in ~8 years. I already realized how old I have become when I needed a 20x

Hi Bill, In addition to what Hans stated, if you have the three flashes and the transmission stops, that could be an RF feedback problem.? Try transmitting into a dummy load using the terminal

Did you turn off all audio processing and other special audio features in Windows? Things like echo cancellation will remove continuous tones like FT8, for instance. 73, Willie N1JBJ

Hi Bill QDX isn't an SSB transmitter, there is no concept of audio gain or volume level affecting transmitter power output. It's all or nothing. You should always have all the volume settings on your

I think the latest documents should be updated, to reflect this. G7JUR