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Gordon, The boot loader is encrypted so you can’t simply replace the MCU. Jeff Moore, W1NC, can assist you with this if you can’t get a new programmed MCU from QRP Labs

Is it even possible to replace a dead STM32/MCU myself on the QMX? I read that the boot-loader has a firmware decryption key. I believe my QMX has a dead MCU. I can handle SMD replacement. Q: I'm

Sorry, the voltages are too high for the capacitors and the currents too high for the small toroids. From the manual: ?T here are two important differences, both are related to power handling. Here,

George, if you just want to send CW to QMX from a computer, I have a workaround. As Robert Giuliano KB8RCO mentioned in your original thread, I have an Arduino program does exactly that. Basically

Corey, what Mac are you using? I know WSJTx on some old Macs have similar issues. When I was using WSJTx on my 2010 Mac mini with IC705, the audio stream sometimes would be routed to the internal

I have a QRPLabs 50W amp kit in the process of construction. I would like to use it with my QMX+ but would like to be able to switch bands on it. I was thinking of just bypassing the LPF in the amp

Ludwig, That's it! I didn't realize that the transmit indicator actually had 3 separate conditions. Thank you and 73s --Corey (WB0RXQ)

Thanks Hans, Much appreciated. RD/RU You are right, it is five digits, it was a typo. I know for a fact RD and RU decreases and increases the RIT value on the TS-480. Only recently (TS-890 and

Scott, in general, applications will be slightly different, but will fall into a handful of approaches. For example, in my repeater application, I have oscillator modules using a FET. I will remove

Very true Steve. In my organization, we were required to fill all empty vias with solder. I was never clear on why doing so improved reliability but maybe this relieved thermal/mechanical stress on

Hi Ludwig, Thank you for all the support!? No worries at all. I'm going to further study the schematic & decide if I need to replace any components in the path of VDD or attempt to replace the

I should have added, we used via fill for via-in-pad applications for surface mount components. In this technique, a via is connected directly to the pad. This technique makes the signal pad much

Oops, I just saw that Hans answered my question on a different thread.? Great timing! /g/QRPLabs/topic/107430777 Hans wrote: Now some of those CAT commands were inherited into QDX

Hans, In the meantime would you consider enabling the KY CAT command like on the QCX*? 73, Mike KK7ER

Corey,? please check Operation manual section "Operating QMX on digital modes" subsection "Transmit status indication during QMX digital transmissions". I think it's what you are looking for. 73,

Is it possible to get audio output to the headphone jack when using digital modes? JTDX on the Mac is quite buggy and often will stop sending audio out to the USB port. When this happens, there is no

One thing I always found interesting was that most of the computer interfaces output to the "straight key" port. Winkeyer (as an example) makes a big deal out of saying the timing is taken away from

Yes Mike Krieger [email protected]> wrote:

I have built up my *9V-QMX 60-15m* with TN0110 - the rounded side was ground flat, the top side was provided with an additional cooling plate, LPF-coils optimized. The information comes from the

Thanks to everyone. I missed the date on those posts. ————————- Jim N7RCS Palm Bay, FL