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I received a rev. 1 kit a couple of weeks ago right before the change over and it had handling damage. To my best recollection, each board was in its own envelope. C213 & R214 were knocked off and the

Mark, This is the problem, not enough audio. Nothing else causes the flashing. It seems a regular fault with Rpi, and non-PC systems. Previous posts my give answers, most seem to resort to reducing

Hi John, thanks for confirming the command. This is a friend's u4b, that should have been working. Anyway after some further investigation: The SW_SYNTH line is asserted correctly. The TCXO does

Hello All, I purchased and built a low HF QDX and modified it with the JasonKits MOSFET PA. I am to the point of frustration trying to troubleshoot why the radio is not TXing. It seems to receive

Folks, I set up SKCC Logger for the QMX+ rig a couple of weeks ago from some setting info I found on groups.io (that I can't seem to find tonight!!).? Ive only run it once since, and **thought** it

Paul, I agree with you it looks like its the LO leaking thru ?BUT... 1) He bought this NEW ASSEMBLED. 2) one of the LPF toroids was completely disconnected because of a broken wire solder joint and

After blowing the finals in my HB QDX, I used the zeners per https://la3za.blogspot.com/2023/04/3-tips-for-not-blowing-finals-of-qdx.html (

Well, I guess I wasn't careful enough. I broke the lead off the Q507. I'll be back after I get a new one installed. Thank you so much for helping me through this point. I'm confident we'll figure this

This tuner has no bypass.? My antenna is in the neighborhood of 1.3:1 without, I think on both 40 and 20.? Just wondering how far I can push it. Bob KG5GTE

There might be several possibilities... * The QMX uses a 12kHz IF (and there's no RF amp to isolate the mixer) so you could be hearing the local oscillator... (if this were the case, there

That`s Scott,? was going to try your advise,? but after testing for power output which was 4.9 after repairs to L2 , I found that when turning on the QCX Mini I was getting a signal on my IC-7300

Sometimes the length of coax you are using will do this.? I recently made a 49:1 for an end-fed half wave and installed the antenna.? I couldn't get it to dip anywhere at all.? I checked the coax

I looked and found one thread on the subject but did not see Hans give any definite answers.? I know 1:1 is prefered and best, but the real world doesn't often give us that.? I ask because my 4SQRP

I actually misread my PSU's current meter. When a DMM is put in series it matches what the PSU is saying. Around 1.3A, but I couldn't feel a whole amp of heat being dissipated anywhere. I removed all

If I read the tester display right, Q507 seems to be ok. But why is the voltage at G the same as at S? Please check schematics and trace from gate of Q507 to R506 and collector of Q514. Check voltage

Hi Jeff, I have a clock sig but not a near short to ground. I think the CPU was damaged with a bad 3.3v supply that failed. Hopefully replacement CPU chips will be available in the future with the

Yes, I found those on Amazon/US after I asked you! 39 mm will work on the QMX nicely. But thank you! I think it is neat to have good communications on these forums and readily findable stuff for

Ah, so many "opportunities"! At a to-remain-nameless former employer, people started reporting a lot of "problems" regarding a certain program. Management felt that this usage tended to foster a

I will order and replace Q507. But before I do that, I wanted to test it first. I carefully lifted the gate and the source off the board and tested it. The results are below.

https://www.amazon.co.uk/gp/product/B0BTYL55XQ/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&th=1