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Some may remember the G2DAF linear which successfully used this technique. And in point to point HF circuits Lincompex (linked compressor and expander) was used starting in the mid 1960's where the

Hi again Rob Just curious, did you solve it? In my case it was a loose antenna connection. My antenna lead terminates in a PL259 and I use a converter to connect it to my QCX40. The PL259 had become

Have you tried actually creating a line of 20 characters? If you are migrating from a 2x16 setup you will only have programmed 16chrs for each line and that what?you are seeing. 73 Ken g4apb

Hi Hans, Thanks for the info, but this now leads to to other things that are puzzling me. Assuming what I have is correct, why can I not send CW?? 3.10 states that all I need do is connect a straight

Hi Brian,? Are you using an external key connected to your u3s? If so TXCW is the correct setting, if sending a preprogrammed message however CW should be used as in parallel 3.7 in the operating

Rick, Going right back to the beginning when in my haste I made my mistakes These are ALL as expected IF you used your own DVM. The manual's chart shows voltages using the built-in meter. Try that if

Hi Brian You don't get rid of the 00 0. I think para 3.10 needs updating... The 00 is the index into multiple messages in the Message parameter, if you use that feature. The 0 specifies the "Aux"

I just finished assembling the clock?kit ver.?c1.02a. The Clock works well but when changing to a 4x20 display, the last digit will go to just 16 spaces, not 20. All four lines will program but with

Alright, my final conclusion on this is that it almost works. The issue is the PWM envelope reconstruction. For one, getting the integration time just right is tricky. Second, there isn’t enough

I'm having a heck of a time setting up menu configurations in a multi band U3S. I have set three, one for WSPR and two for transmitting CW. All different bands. First problem is the CW settings. I

Jerry, I think you hit on a good solution. It would be an interesting project to pursue. Wish I was better at coding in C. The hardware is straight forward. Might want to upgrade the processor too.

One could add the complication of a mixer such as an SA612 to down convert that 20m square wave coming out of the VCXO Si5351B, bring it down to 40m or 80m.? Then amplify class E, modulating that amp

Guido's method has been labeled as "EER" in this forum, an acronym? for "Envelope Elimination and Restoration". Seems the EER acronym applies best to the scheme that Alvey just described, where we

If updating the si5351 through the i2c interface is not fast enough to create smooth transitions, we could instead jerk around the 27mhz reference oscillator: ?

Thanks all, I did hook grab a battery as the power source and the noise is gone. The incorrect voltages still persist but I've been able to make it out via WSPR so I'm guessing things are ok for

Hi: This is KA7QVE I built my 40 meter QCX and it does exactly the same thing . However, when I got it all together and in the case I can handle the knob and case and no hum is herd unless you take

I believe this topic is worn out. Can't we stop!Regards, Gary Bernard. W0CKI

Is this topic anything to do with QRPLabs?? Try looking to see if QRP guys have their own group!! Geoff

Well done Paul!? Excellent news. 73, Peter GM0EUL

Hi Steve Nothing left to test by the time I got it out. When I had pulled Q1 the short at Q6 went which is what lead Jim to believe that was the cause of the issue. Paul From: