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Hi Jim, is there no continuity from each of the 6 points of T401? Did you measure from the pad or touching the cut surface of the wire? Please check by touching only the pads. Maybe one wire is not

All the contacts between different layers are made by a metal plating of the surface of the hole. It's something like a really thin tube around the hole. I'm afraid this could be to much. Each heating

Sounds good

Hi all, next Monday, April 15, is the next QCX WARC Party. See https://www.qrp-labs.com/qcxmini/qcxwarc.html for all info Join the discord page in the #qcx-qrp-operation channel to post your QRG (and

Ok it seems to be running normally after loading it again.? I connected with the terminal and ran some of the hardware tests. May need to review some things in there before I close it up and start

@W7QJQ - I think you replied to the wrong topic. -- W8BSB - Brian S. Brumfield - Central Ohio

The spraycan work-around has ceased to work any longer. Sigh. The QLG2 is basically D.O.A. -- W8BSB - Brian S. Brumfield - Central Ohio

Tyler, my take on this is that the Si5351A will not work for your P33 radio. Pages 10,11 and 29 of the Instruction Manual (pages 17,18 and 34 of the PDF) explain how the speech audio varies the trans

On QMX kit Rev 3, high-band version I?successfully made and wound the trifilar winding for T401 and confirmed continuity, before and after soldering to the board, between A-A, B-B and C-C of T401. On

Thanks for the link.. is this something that would also work? https://a.co/d/9O1DCsw

Hello Mike, yes, but only if the pp voltage of the rf signal is higher than the supply voltage. If not, D506 never is condutive. 73, Ludwig

Hi Mike, indeed. It looks like LPF2 is in parallel to LPF0, not good. Maybe there is a short from Q511 drain to GND or from the connected parts of LPF2 to GND. I would inspect these region using a

Hi Hans, When you implement GPS calibration for QMX, Is it possible to do the calibration right before each WSPR Tx? For the kits I have(U3, U3S, QCX), the calibration happens after each Tx, and

This amp worked well for me https://kitsandparts.com/rfamp1.4.php 73 Don ve3ids

Ok!! Good stuff. I have never added a buffer amp to any of my si5351 projects. What transistor should I use? From what I’m reading from all the replies I need to connect gnd from si5351 to the

Wayne, working hard to find the fault made much more memorys than only switch the QMX on and it's working. I guess your QMX is now more valuable than before. Enjoy this fine thing. 73, Ludwig

Ha! I have a couple in the basement. One is tube/xistor and the other is fully transistor. International Crystal wanted too much for reuse crystals. The “Porta Pac” Larry KB3CUF

JZ and Ludwig, I have done a lot of data collection that I am attaching here. All of these measurements have been done with the 1.6 VDC battery hookup through L502 as the earlier picture shows.?

Very high, dangerous without a good load. For more investigation avoid sending and reduce supply voltage to around 7 V for short tests. Please connect a dummy load and go to Terminal - Hardware tests

Correction, when running SWR sweep on 20m QMX consumes 1.4A and SWR needle show a tiny signal when at maximum sensitivity Using HW Tests - Diagnostics, I see 0w output on all bands except 15 and 11m