How not to build a QMX... | HamRadio

In this epic (=boring and long) video I give my experience with building the High-Band QMX transceiver from QRP Labs and plenty of bad advice.
The first part of the video describes some of the problems I had. In the second part we look at the diagnostics menu and what my QMX shows there. I think it is mostly OK and functional.

I did one successful (but tough) POTA activation with it, however I also saw some weird behavior and of course that makes you wonder...

Make sure to also watch the QRP Labs video "52 tips for building your QMX successfully".
This video contains a treasure trove of information that helps avoiding common mistakes!

Timestamps:
00:00 Intro
00:11 Deboxing Timelapse
00:55 Tilted power connector
03:15 Fixed inductor and diode orientation
05:24 Squeezing toroid windings
07:23 RWTST transformer and SWR bridge
09:18 Trifiliar coil
09:50 Burning off of enamel on the THIN wire
11:08 General impression and advice
12:01 Tips on building the control board
16:24 Building the LCD board
21:08 Diode mod. on Q508
23:10 USB port problems / Usage
25:00 QMX Terminal menu
25:43 Random observed failure with RX filter sweep
26:46 Audio filter sweeps
28:17 RF filter sweeps
30:20 Image sweeps
31:19 SWR sweeps
32:18 TX output power on all bands
34:07 Outro

Music:
URL: https://remix.kwed.org/remix/6951
Title: Myth
Arranger: Eivind Sommersten
Composer: Jeroen Tel

#hamradio #amateurradio #qmx