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Why not use adjustable inductors? Or add a pad-footprint for a suitable adjustable inductor and let builders install such parts if they want? I find that I enjoy winding toroidal coils (since the

Wanting to go pedestrian (digital) mobile and wondered if anyone has experience with the Moonraker Whizz Whip working with the QDX, or any other small, portable antenna that could work with the QDX? I

There's a little-known secret about ferrites. Almost all frequency-dependent ferrite devices are adjustable, because ferrite devices are made from a material that varies from day to day ... and

On Sun, Feb 5, 2023 at 10:13 AM, Stefan wrote: > > Hallo zusammen, > Leider wird mein QDX-Transceiver zur Zeit nicht von Windows 11 und Windows > 10 erkannt, obwohl dies früher funktionierte. > Ich

I like GridTracker, a litle fiddly to set up, but it's been running flawlessly for over a year. 73, Willie N1JBJ

Hallo zusammen, Leider wird mein QDX-Transceiver zur Zeit nicht von Windows 11 und Windows 10 erkannt, obwohl dies früher funktionierte. Ich gehe mal davon aus, dass es wohl im Ger?t irgendwas

I just installed cqrlog.. I really like it. At the moment I'm trying to get it to log ft4/ ft8 contacts. Wes -- wes377@...

I know that finals can be destroyed in milliseconds, that's is exactly why a PTT input is needed. The first thing the AH-4 does at the start of the tuning process is connect the transmitter output to

Thanks G4ZFQ. I found AC0Cs common base High Dynamic Range RF Amp. This is very broadly similar to a common gate FET circuit I was considering

Hi Levi. The 5v on pin1 of IC9 is fine. The other voltages indicate a problem though. Please check the voltage at points 5,6,7&8 on T1. Refer to the manual to find these point numbers. They aren't

I have the AGC module fitted which limits space a little. Trying to maintain the nice break-in feature is a good point. It would be desireable to have the pre- amp inside withing the RX chain. It's

Thanks, this looks good. I just ordered some MAR-6 monolithic amps. Around 20dB gain with 3dB noise sounds good. Also, the circuit may be small enough to fit inside the case in the RX chain only?

Steve, If it has to fit inside then Andy's suggestion is probably the easiest. I am intending a larger version of a QDX, I favour Nortons. Look here

The Chinese are only copying Microsoft ;-) -- - 73 de Andy -

A MAR-xx device. https://qsl.net/g0ftd/other/misc/mini-circuits-mar-amp-devices-mmics.pdf Even your grannies cat could build one ;-) -- - 73 de Andy -

Peter, Willie Ebyte seem to be progressing! However, be careful. This document seems to refer to a built E108-GN02 module, not the basic GPS "chip". Where is this flash memory? I suspect it is on the

Ronald, I think I might be having a similar problem. I'm not able to get the BPF to peak at more than 3. I ran these voltage checks you suggested and I only have 0.8 v on pins 1 & 7 of ICs 5, 6, 7 &

Just finished assembling my 20m QCX+ and in the process of calibrating it.? In the process of adjusting C1 for peak, I am unable to get BPF amplitude scaling factor above 3. Twisting C1 brings it up

Hi Steve. That's a very interesting issue. I was thinking that if you haven't fitted the AGC option in there, then you might take that little circuit board included with the kit for the purpose of

Jake, on that IC6 pin 5 short to ground, can you verify the actual resistance being measured to ground with the ohm meter from pin 5 when you get a chance? Some continuity meter measurements will give