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Chris, How far off is it? Does it stabilise?I'd think just about any PPS would work fairly well, it gets smoothed. I'm not sure about how pulse width and polarity will affect it. You have read the

Have a look at " The scientist and Engineer's guide to Digital Signal Processing " by Steven W Smith. Quote from the Book, " this book is written for those who want to use DSP as a tool, not a new

Hello, I just connected the wires and it burst into life. However, I did end up logging in?to the GPS using the free software to switch some things off that we're not needed. I also?set it to UTC

John, One useful resource for phasing-type rigs is the (free) Quadnet filter design program from Tonne Software.? This program calculates the component values for various orders of all pass filters

Try the Logitech again, with a mono plug.

I just turned it off, set it for straight key, and started using my usual shack keyer Logikey K1. The internal keyer is not usable, impossible to send coherent code.?? Not even close to being

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