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This whistle sounds like it may be an acoustic feedback problem, perhaps with your mic and IC705 speaker.? Try with headphones on the IC705 and see if it goes away.? There are probably a few reasons

Notes on calibration of my other QMX* devices.?? Some (hopefully) useful info: Calibration of my QMX high-band: - all completed normally and looked good, except 30m phase error had an irregular

Hi All, This is the 12m spectrum looks like on my QMX rev3, when dummy load connected. Does this indicate a bad PCM1804? Do I need replace it? -- 73, de BD8BTE op: Lun Yang

After testing the parameters with the help of Stan, Olivier and Martin, my qmx+ work now in CW and RTTY with Fldigi+flrig. The right solution was to made FSK in fldigi and also turn the QMX+ in DIGI

Win 11 fw007 all three ports enabled and working...drops all 3 com ports after 10 minutes again. Set for two ports seems rock solid so far.

Thanks for letting me join the group. ?I placed an order for a qmx kit when I found out about the experimental ssb firmware. ?The boards look to be a work of art. ?Short of printing a mini mic

On some of the old Retevis and Baofeng mics, the (physical) mic port is actually sealed leading to muffled audio. Drilling a small hole in front of the element solves it and transmitted audio becomes

Hmmm I think I must be doing something wrong...if so please enlighten me! Under 1_01_007, Lubuntu 25.04.: 1 port (default) seems to work. I could connect with Putty to ttyacm0. Tried to change to

My system info: [cid:761dfdc9-0dcd-426d-a580-138a21f37894] Tony AD0VC ________________________________ Sent: Saturday, April 26, 2025 8:38 AM To: [email protected] <[email protected]> Subject: Re:

This one seems to work for me. When I switched to 3 ports, device manager showed two COM11 ports and COM13. I changed one of the COM11 to COM12 (which was shown as "in use"). I had to power cycle the

Hi all I updated the SSB beta testing webpage of the brave, here: https://qrp-labs.com/qmxp/ssbbeta.html and released firmware version 1_01_007 to it. This fixes one more typo I found in the USB

Thanks Ron, I appreciate the reassurance on my windings. I've checked the capacitor C5 and it is labeled 390 and C1 joint looks pretty good. I'll be resoldering the one leg of T1 as pointed out by

No offense taken at all! I'll resolder the leg between C5 & C8. I agree, from the front side it looks like an incomplete solder joint. From the back side it appears normal. I'm REALLY hoping this is

Hello Hans, here are some new data I've got when analysing the USB data stream. I started QMX and PuTTY and the collected data are starting the moment when hitting ENTER. Each line is one packet

Thanks Moritz I found one more single byte error in the 440-byte Compound USB descriptor. Amazing how Linux manages to sort everything out and work fine anyway, despite the errors. I've fixed that

Good day. My QMX+ V3 seems to be stuck in firmware update. By providing a new firmware file it will try to initialize, and after a few minutes gets stuck on Band Version. Stays there for a minute

Hi Scott From your enclosed pictures I still don't like the look of the joint between the C5 and C8 legends. In the pic it has a dark ring around the wire, which the others don't have, suggesting

CW not working ? Just a stupid question. did you change back from Digi to CW ? Bonne chance -- Martin DK3UW

Many thanks Stan for all this infos. With your parameters i have now tx in rtty. In cw its not working. I will see with my friends in the radioclub the next week for continue this configuration. After

Hans, I think calibration in _006 is better, but there are still some issues. I am attaching some screenshots from my QMX-lowband calibration that may help in diagnosing the phase-error cals that