开云体育

In assembling my latest 20M QCX+, I messed up two of the included Diodes. In my shame, I ordered some replacements from DigiKey. Can someone tell me if the 1N4148FS-ND from DigiKey is compatible with

I've got two QMX+ units and have decided to sell one of them. This one is a Rev 2 PCB, wired for 9 volts using the WTST (weird twisted sister transformer) method. Works great on all bands, 160-6

Hello,? I just finished my QDX high band build.? It took me a while, through trial and error, to get it running on FT8.? It ran for about an hour just monitoring and then made my first QSO.? Then

Peter, all of these scans show bad responses except for the 40m SWR scan. I would first check very carefully your installation of the PCM1804.? ?Did you get all of the pins soldered well with no

Hello Cal QMX is a whole other ball game though :-) And SSB is not just about talking into a microphone, it's also about supporting other non-FSK digi modes properly. I have just now added a note

Personally, I didn't buy my QMX or QMX+ for SSB. I already have a (tr)uSDX for that science fair experiment! ;) I was surprised and I am disappointed that the rigs do not support seconds precision on

I am also interested in a group buy should one happen.

Thank you for this information! I will dig out the schematic and have a closer look at the CS4334 to see if I spot anything.

Congrat's, Dean: happy building! FedEx took an extra day for me. They do that sometimes. Nothing was opened or tampered with, though it was evident they weren't very gentle with the package. Inside

Thanks Stan. I ended up removing it and re-winding it. Looks a little bit better.? Time to button this baby up and finish up my antenna install! John

Hello Ludwig, i tried to answer here with screenshots... for some reason my post does not appear. I uploaded the pictures to a free host. 73, Peter Here are the adc i/q

Yes works well on windows. Paul DJ0CU

That is a little low, but not bad. The 20m BFP is shared with 17m, so if you look at both scans, you can see the filter shape. You may see that 17m is down on the other side of the bandpass

This is the only band that doesn't really look like a band-pass response. Acceptable?

SOLVED. I had the keyer in practice mode; apparently in this mode the low pass filter sweep doesn't work. Got out of practice mode and all is well.

All low pas scans look like the attached, any ideas of likely culprits?

There can be plenty of different sorts of problems in establishing a USB link, and I'd hate to leave an obviously unsoldered pin as a potential source of trouble. The manual suggests soldering the

Im guessing the isolation transformers are blocking dc bias voltage to the receiver. no? -- regards, Bryan, N0LUF

Mike, I'm sold on Hans' approach, and look forward to seeing what his SSB implementation on the QMX can do. The history of product development at QRP-Labs may be a bit bumpy at times, but generally

Rowan (and group) A report on progress here.? A bit of catch up history.. My QMX+ was reported with a 1000 hz tone with some kind of faint digital signal modulation on 12 and 6 Meters.? It was