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My QMX kit arrived with the short in place. I removed Q104 (the little one) and the pad was still shorted to Q103’s tab. Using just a soldering iron I first lifted Q103’s two leads. ?Then I

Note that for the QMX (not the QDX) There are unpopulated holes for potential use of these diodes at D503 and D504. The jury is out on whether these are needed pending additional testing. -Steve

OK, but how is FT8 a beacon mode? Just call CQ and never answer, and then scrape spots off pskreporter or some such? Or are you listening for FT8 and doing some kind of reverse beacon thing? I

Andy it's exactly what they are guaranteeing they won't do, but that is off topic so won't expand further.

I uploaded photos of my soldered QMX boards and asked it to check for problems, solder bridges, out gave me a whole raft of tips where to look regarding Rx problems, so yes it's very much on topic

Thanks for you ticket reply to my question, Hans. I've ordered one of each Progrock2 and QLG2. It would certainly be considerably cheaper than the alternatives! They will be boxed with a stable psu

Yes Bob but before 2021, where exactly it was trained is a bit of a secret, but for sure the internet as well. Paul DJ0CU G4ADF

Hi Nigel It IS on my ToDo list for U3S... but, I'm sure you can imagine, my ToDo list is not very short. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

My impression is that is due to the QMX reporting a 3200 Hz receiver bandwidth, i.e. the digi bandwidth, instead of the actual CW bandwidth. Gary W9TD

Hi Willie, Thanks for prompt response! I will try to expand current scenario, are you sitting comfortably? <grin> Short version: During the monthly beacon team meeting last night mention was made

IMHO, this method is valid also but requires two diodes. Why not eliminate the spike at the source? If you have two QDX, you might try using the L14 diode in one of them and see if it gives you any

Dave, I checked our stock at work and we use aTDK part: GLFR1608T470M-LR. Described as a 47UH 0603 power inductor 20%. From the schematic, it looks like they are power not RF. Let me see if I can

After smoking finals in 3 different bad swr occasions ?that’s what I do to protect my qdx finals and it works. Many use in the field with bad swr and even no antenna connected by error. 73 Barb

For the QDX, install the 1N4148 in parallel with L14 with the banded end of the diode connected to +12V end of L14. I personally would like to hear from anyone who has fried a BS170 with this diode

Why wouldn’t you use WSPR? That’s much more applicable to beacon use than FT8, which requires an operator… 73, Willie N1JBJ

Thanks Hans!? Exciting!

Karl, you sent this to the WRONG topic and guy. NOT ME! Checking all messages sent on groups.io, I found the original message as below. Not upset, trying to help both of you. So sorry, I hit the

Greeting all? I am involved with a VHF beacon project and for some time the team had settled on using PI4 plus CW as the Tx modes. We are now contemplating if FT8 would / could yield more reports

Hello Alan There should not be any 0.5 Hz frequency modulation. If ProgRock2 is set up correctly and on a stable supply in a stable environment, within a few minutes of power up, it should achieve

Roger, My tests indicated that the PPS modulates the output. Just a little +/- 0.5Hz, but I'd be wary to use it for a reference. I have just left it, no further checks, there have been a few other