开云体育

Does this happen into a dummy load? 73 Roger 8P6RX This seems to be a complex problem because I do not understand what is happening. I will try to explain as best as I can. QMX mid bands built for 12

This seems to be a complex problem because I do not understand what is happening. I will try to explain as best as I can. QMX mid bands built for 12 volts and Z-11 Pro auto tuner. I start on 40 meters

Would having the SWR sweep on the QMX display satisfy your need? I asked Hans for this a while back but I'm not sure if he read my request (busy guy). It seems that SWR sweep is the only terminal mode

I may have the same issue with my QMX+. It enters Safe Mode as soon as the key is pressed on 80m and 60m. The 40m and 30m bands work fine, although 40m and 20m have nearly zero power output, which I

Hi Ari, currently you can leave CW wide open with a bandwidth of about 2700, or select any of several filters of 500Hz and narrower to 50Hz.? Nothing between 500Hz and wide open - that would indeed

Ah, so it does!? I was coming from the perspective of adding the AGC to a rev 1 QCX+ and having all the extra wires. Yours is so neatly constructed that I missed it! 73, Mike KK7ER

The 'scope traces from your archive of the K0IKR post do resemble the issue I am having - if anything, my gate signals look a little more balanced than what he had happening. I didn't keep a note of

Please include me for a US based group buy. -Dj, N1JOV

Thanks for your help, Stan. I'll follow up when I can go through your suggestions with my QMX. I have not yet put it on the air with an antenna. 73, Randy, KS4L

Hi, my QCX has been modified for a passband of around 900Hz and has found more use after the modification. I have a half-built QMX+ and the specs say that cw filter is adjustable from 50-500Hz. Many

All Thanks for all your comments. It took me a while to find this one. I kept pulling and re-winding T507. I was convinced the problem must have been something I had done. I just did not expect the

Bill, If my memory serves, I found that increasing the bias of the IRF510s to 100mA over the starting current resulted in higher output power.? This makes the amp less efficient, but Class AB linear

In for a US based group buy

I wanted to try using WSPR, but every time I reboot, I have to set the time on the QMX again. A friend told me there's a GPS module that can help calibrate the QMX's time. I thought to myself—my

Good catch, Stephen. I had one QMX with cracked and missing bypass caps, but this was seen before I started assembly and didn't require any diagnostic acumen. The two QMX kits I received last week

Yes as a matter of fact. I couldn't find the problem with my QMX Mid-band, so I sent it to Jeff, the renowned QRP Labs Repairman here in the states. Along with a cracked capacitor, he reported R520

Ooooh so cool! When will Hobby Lobby have them in stock? Dave K8WPE

Hi Dave Polar Modulation generated SSB is mathematically the same in the end as SSB generated by traditional filter methods or traditional SDR modulator methods. It sounds the same. The point isn't

OK, I admit it.? This ( PC control of QMX) is getting addictive now :-) Whilst I am adding a gnuradio bandscope to my widget it was much easier just to get a standard SDR project to read the IQ

Not needed. ?Spend the money on a decent iron then scrape and tin with a solder blob For ‘hard as nails’ motor wire either scrape completely with scalpel or burn off with a small blowtorch (also