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The key input is designed for a straight key or a paddle depending on what is selected in menu.? It does not work well with most keyers. If using a? paddle mode B seems to work best.

Hi Alison, I read about this a while back and have been looking for some more information on 3rd order all pass filters since then.? Unfortunately whatever I can find is a bit over my head.? Could

Parts came in today, hoooray.?? I put the new uP in my DOA QCX 40 and it came up running.? Got thru the alignment, sort of OK but haven't got a distinct null on phase Lo.? R24, ends with up a

I had a persistent qcx20 bug that turned out to be cold joint on upper component side layer found only by careful exam of upper board joints. Just a suggestion.

Yeah, that was the first thing I checked - I soldered T1 before any other parts, and I made sure to test continuity from the pads.

Check your solder connections on T1.? Measure from solder/pad and not the wire end.? A poor solder connection can cause BPF peaking issues.

Yes, band is set for 20m.? I've "factory reset" a couple times, and always set it back to 20m.

The other Q I have:? since I can't get Peak BPF over 5 turning the pot, should I add or remove turns from the larger secondary on T1?

3.9 Band set for 20m ? 72? / 73, Bill, N4QA

Hm.? I checked the pot, and it looks fine - but for good measure, I reflowed all three connections.? Didn't fix the problem. However, I've discovered that when I key down, the clicking goes away,

Nope, S-meter is not enabled - this literally starts as soon as it's powered on, even after a factory reset.

Yup... re-solder your volume pot. ;-) 73, Stephen VE6SVJ Sent from an electronic device.

Did you enable the S meter? ?On my 20m QCX it makes a sort of clicking sound with the S meter enabled. ?Disabling the S meter completely removes that clicking sound. Curt M.

I just got my QCX-20 assembled and i'm having an issue I haven't seen talked about (though I could just be blind) - without plugging in headphones, I started trying to align the BPF, and couldn't get

As Alison says, either The BS170s or source resistors are going to be burnt out. BEFORE replacing them find out why Q201 is not conducting to reduce the bias voltage. What is it's base and collector

As I was having me breakfast, ( Man ! That pink grapefruit was yummy ! ), it occurred to me that, based on my low output power on 80m from the QCX-17 comment, someone might think that I had destroyed

HI, I'm really trying to keep all question here on the group and not in private email. I was trying to bring linear PA back to life – as I see, the problem is that I have +12V on gates of BS170 in

Hans, does this mean that if a prototype is shown at Friedrichshafen, the QSX will be released after the fair? ;-) That would mean release in july. No worry :-) Regards, Stefan

Forgot to mention. CHU 3330 kHz is also roaring in on the QCX-17 tonight. 72 / 73, Bill, N4QA

Wooooooohooooooo! Sent: Friday, April 12, 2019 3:19 AM To: [email protected] Subject: Re: [QRPLabs] Friedrichshafen 2019 Hi Steve Please, will you have a stand at Friedrichshafen this year? Yes. My