开云体育

Finally got a 14.074 mhz signal into the QMX+ at about 17 mv. My Rigol DS1102E scope may be insufficient for this task but I can display the 17 mv signal at the BNC? but nothing at pins 1 and 7 on

Hi Guys! I managed to install the 1_01_003 SSB Beta on the weekend and just took a few screenshots to provide another data-point for a High-Band QMX. Calibration was ok, but 20m and 10m look a bit

First success yesterday with SSB on my QMX+ on 40m. Worked GB70RS at around 64 miles. He said the audio sounded good but to be careful of chewing the mic! 73 Tony G3OVH

Hi Don, I just finished my build of the QMX+. I have completed two other successful QMX builds. So, today I applied power as suggested and wound up with the square box display. I figured it was the

Hi Jim, I do not believe the PIN diodes have enough bias (reverse and forward) to allow the external transmitter to work.? It should be easy to install a relay that bypasses the amp

Dear all. on my QMX, Rev2, 80m-20m, the diagrams for the ‘phase error vs DAC’ do not correspond to Hans' example. I have performed a factory reset. I have adjusted the band configuration: start,

The wiki page QMX QMX_plus SSB settings ( /g/QRPLabs/wiki/38982/219422 ) has been updated by @Ludwig_DH8WN <DH8WN@...>. Compare Revisions (

Back on the air :) I chose in the end to just replace ic 402 and 403, and everything seems to be working fine now. I'm still not sure what exactly killed the chips. The limiting diode and the

I actually removed the knob completely and it did not solve the issue. so I have confirmed that there is no travel issues due to the ?knob restricting its ?movement.

I used two different wires - The one that Hans provided and this one: https://www.amazon.com/dp/B07DYF53ZN. I did that in order to maintain color coding for the P and S wires. The P wire is the Amazon

K used a lighter and tried scraping as well. I'm going to try with some hot solder. Thanks!

You're referring to the leads on the right (primary center tap), correct? If so, I did that, which I believe is how I'm getting continuity from left to right. However, I'm going to apply some solder

In Washington DC on a beautiful day! Now to find my paddle so I can send anything apart from messages! De AC3K

Hi Nate. Transmitting and receiving.? I'd like to put a switch on the PTT going to the amplifier so that if I want the amplifier in the circuit, all I do is flip the PTT switch so that the amplifier

My experience is different, Chuck.? A simple roll of wire (certainly not exotic) I bought on Amazon from a quality manufacturer happens to have a high-temperature enamel.? So yes, I can burn it off,

Unless you are using some exotic insulated wire, a few seconds of exposure to the flame of a butane lighter will easily burn off the enamel. After you have done that, there will be a little oxide

Joel, when replacing the transistors 'next time' if there is one: just cut off the body of the bad transistors, leaving most of their lead-length in place and soldered to the board.? Then lay the new

If you didn't scrape the enamel off the newly-twisted 'A' center tap on the right side, those two wires won't contact each other, and you won't have continuity between the two left 'A' points - even

Jim, are you talking transmitting through it, or just receiving? Nate N8BTR

The same with me. Smtm you need to press PTT twice to start tx. 16:35, 25 March 2025, "Howard Lamhut via groups.io" <howardlam@...>: QMX… I have the SSB software installed