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Gary, I had the same problem as you.? ?Here is my solution /g/QRPLabs/topic/qmx_and_esd/111241054 Brien - KE7WB

Synchronous AM as well.? Once you have an I-Q data stream you can do any kind of demodulation you want. 73, Don N2VGU

Indeed, LTSpice does not always agree with real hardware. Especially with something like the QMX final and LPF's. Some of the details don't get properly modeled. But it's way better than just staring

Today, I also tried the SSB firmware 1.01.003 on a SOTA actication (HB/BL-005) - see https://reflector.sota.org.uk/t/qmx-announcement-on-ssb-firmware/37704/18 The SSB part works perfect, but it was

So it would be OK for 20v IF you had a perfect output load matched to the transistor? Makes sense. Thanks, Gary! No. Don't even go there. At 20V to get 50W out you would be very close to max Idd.?

Nate, Some additional details: In that old thread I pointed to, I suggest L502 is causing larger voltages across the BS170's than there should be: /g/QRPLabs/topic/111411449 That

https://youtu.be/GkOz4iJQ86A?si=Rl1X3UsRG22i4lf5 Applies to LINEAR push pull amps. The 50W amp is not linear and the rules are not quite the same. Generally for high power amps LTspice reaults are

The 20V is a hard limit gt gate brakdown votlage.? ?The 50V is the peak voltage the drain can see in operation before the internal silicone goes back to sand. The device was specifically designedd

NO!? The pinout is not the same making for odd crossover mods. The max operating votlage for RD16HHF1 is 16V, no exceptions. The max power is 16W per device and a pair cannot do 50W without emitting

Stephan, My 80 meter band phase error calibration graph looks like yours. Another ham said to check where the band center is in your band configuration menu and make sure it is actually set to center

Screenshoot 80m phase error after factory rest

I have a similar pattern in the ‘80m phase error vs DAC’ as Mario Vano AE0GL. I have done a factory reset, no change. Any ideas for troubleshooting? Many thanks to Hans for the SSB software. I

This is correct,? and is the issue. No need to update or change WSJT-X.? ?If you have Hamlib v2.6.1, simply choose QDX or TS-480 as the radio type.? The QMX type is broken in this version.? You

Chris, I've been working through this series of YouTube videos...I think Allison may have recommended them previously. I've yet to download LTSpice, but the videos cover that,

Sorry, the best place to get it is here https://wsjt.sourceforge.io/support.html It tells you where to put the file. 73 Alan G4ZFQ

Thank you Ronan. I could not remember what it was called.? Tinsel wire. YUK! Even if you do manage to get that stuff soldered,? it will likely not hold up to any strain

Chris, "Authorised" in so far as it is open source. The variations are not promoted on the main WSJT-X page. Like the RC versions "improved" versions are best used by more experienced users. The

10 meters but they give good output on 6. Tony AD0Vc ________________________________ Sent: Monday, March 24, 2025 4:56 AM To: QRPLabs@groups.io <QRPLabs@groups.io> Subject: Re: [QRPLabs] SSB

This is a 9 volt build. It is supplied through an LM338 regulator adjusted for 9 volts. The regulator input is from a 12 volt linear bench supply. The BS170s came from Mouser. They were mounted

In the QMX+ I just mount them face up with the washer as usual. In my QDXs I have experimented extensively with heat sinks and I found that heat was never an issue. I do not run WSPR, mainly