Mouser has them. Glory to God in the highest, and on earth peace, good will toward men. Luke 2:14 On Thursday, June 24, 2021,

I might need to replace Q5, and digikey seems to be out of them. I like to have cheap parts on hand if I think that it may be the issue when I go in for a repair.  It is easy just to pop the new part

Hmmm....since wind and rain usually accompanies lightning storms, maybe it is the wind or precipitation static build up, and not lightning that is the culprit...or both? If this is true then the

There was a match on it, but I am not certain if it had a DC shunt to ground or if it happened when I was disconnecting it to test on my scope. All I know is that sometime between around

I've had a bunch of QRP Labs U2/U3#s etc running in the attic for 6-7 years and I've never switched them off or disconnected them during a thunderstorm. I do however have a T-Match on all of them,

Gas discharge tubes have been used for protecting equipment that has long-term connection to an antenna. Before that a simple air-gap between two pointed metal pieces was used to limit antenna

My advece cannot protect from lightning ⚡ but add a little protection from statics in the air. Without any protection even dipole might damage your transiever during windy weather. It is naive to

When did the 468/F become a "cast-in-stone" number? It is an approximation and includes the possible reduction for insulation vs bare wire. When I got my license in 1955 it was an approximation number

Hi there I have completed assembly of my qcx+ 40m, it makes tone and when I performed the bpf cap alignment I got a magnitude rating initially of 7, peaked it at about 8 o’clock and removed 5 turns

No protection may be actually better than little or incomplete protection :) you'll see how difficult it is here, very good article in 3 parts: PDF Lightning Protection for the Amateur Radio Station -

I'd say these things aren't an exact science, depending on locaton, height and other factors, just start with a too-long wire and bend it back on itself before finaly cutting it and even then leave

We'll keep each other posted, I'm following this topic. You can try ordering IC2 replacement from the shop at QRP Labs 6 USD or 4 something Euro. if you will need that, I'm hoping to get trouble

I'm selling my original QCX 20 that I got my 1000 mile per watt award with. It works great and has been a lot of fun. It's got a nice orange and black 3D printed case that has a built-in stand on the

Ran across this old blog post https://www.qsotoday.com/n6kr-desolder-primer.html "A Desoldering Primer" by N6KR a lighthearted essay, but might be worth reading before desoldering! Jim

Thanks Timothy - this is exactly what I was looking for. Yes, I had read about the unloaded impedance or reactance being four times at the lowest frequency. For me, that would be 80M. Yes, it's

Our SSB tropical hospital network suffered many zappings from thunderstorms. Ergo, I collected a stash of frontend transistors. Outstations learned the hard way that it was

Paul, If you're using it with a QCX without a tuner, you should adjust the length for resonance in-place with a decent antenna analyzer. The last answer is correct: that formula is "rule of thumb" and

No... 468 is a SWAG anyway and there are too many other factors to be concerned with. I cut using 468 and trim to resonance. To each his own. Mike WM4B

Just a discussion, do you shorten a dipole 5% when using 16 gauge THHN insulated for resonance or not ? Example: 468 / 7.025 = 66.61 ft. X 95% = 63.28 ft. Which would you use ? Going to build one and

Andrea; I had a QCX 'classic' sitting in the drawer for a year, and one of the inductors providing VCC to the 328p processor became open. I was able to upgrade the firmware, even though the 328p