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Yes, the tx voltage is on during receive, and will be very close to the supply voltage. Hans has given a good description of why this is done; it helps receive work better. It is turned off when

*FYI - Complete USB failure on two different machines running Windows 11 Pro* One Ryzen 7 5800X machine with 32GB Ram One 11th Gen Intel(R) Core(TM) i5-1135G7 with 16 GB Ram Edition ? ?Windows 11

Chris, I've never used the Winlink auto-connect feature.? You will need to ask this question in a Winlink forum; it is independent of VARA and radio (QMX). Stan KC7XE

Hello Ludwig and Hans, because I have planed a SOTA activation and my power supply has no current limit, I didn't want to risk with the check before that. Nothing was visible damaged or burned. After

Evening all I have a question regarding the operation of the power control around the PA transistors…does the DAC drive Q512-5 and therefore Q507 when the unit is in receive, meaning the PA supply

If I have done a successful calibration with 1.01.003 that I shouldn't have to recalibrate if upgrading to this new version?

Here is a link to a YouTube video on testing the 50-watt amp: https://www.youtube.com/watch?v=rUVLphjKaFQ&t=28s 73 Evan AC9TU

This is a bit unrelated, but I was wondering if it would be possible to make the QMX do FM? Because then with a short 10m antenna you could have quite the portable rig with CW, SSB, and

And from me. Lubuntu works well and hassle free. Nearly 30 years of Linux for me. Roger 8P6RX ?Get BlueMail for Android ?

Another vote for Debian. It's been nothing but trouble free for me for 15+ years. Install defaults and use it. Updates won't break your machine.

FWIW I have run Linux on nearly all of my systems at home for many many years, using mostly the Debian distro, and no issues.? It runs a lot faster and far more stable than the one Windows 10 system

I have windows 11 fw004 and everything is working great except about every 10 minutes Win11 drops all three com ports like clockwork. Power off QMX+ power back on and its up and running again for 10

Randy, no battle. If VDD rail is higher than voltage from the linear regulator D103 will block the higher voltage toward IC101. 73 Ludwig

Stan: Is there a way in Winlink/Vara to restrict to a given band in auto connect (channel select)? Chris

Sorry for the delayed response to your insights. I've been out of pocket. It is a bit odd, but yes, R110 and R112 both measured 29k ohms which is a bit out of spec, but I doubt enough to cause an

20M QCX_Mini driving the 20M 50 watt amp, 13.5 volts, 50 ohm antenna load 6 watts output and the mosfets get hot Set QCX keyer to practice mode and everything checks Ok, set BIAS, mosfets are

Richard, Digikey info PCM1804DBR 296-26306-1-ND IC ADC/AUDIO 24BIT 192K 28SSOP Replacing this chip did absolutely no good on my QMX+. Others have had the same experience. It’s not a universal

Gang, The QRPBuilder magnetically attached Iambic and Single lever Paddles are now back in stock. Also, this will be our fifth year at the Dayton FDIM vendor night on Thursday May 15, with all our

Nice work btw.. If the qmx is in Practice mode, no SWR measurement is possible, but it is showing everytime an SWR? 1.6-1.8, and SSB will still work.I was working on a linked dipol. Maybe the should

Except that one has to learn writing commands from scratch. I hope you are not going to suggest using one of the free GUIs that sit on top of Linux. Been there, done that and had to format the whole