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Thanks, Richard!

I have owned this desoldering iron I purchased from amazon for a number of years. It works painfully easy. Just let it heat up, place it over the part to be unsoldered. Allow the solder to liquify and

Retired Oceanographic engineer with many years at sea. the rule is - You must make it work again usually with limited spares. I use an appropriate USA number drill from a #60 - #80 set. this is held

an interesting idea, to validate results from antenna modelling software a little arduino nano or ESP32 with a GPS module, and the RF dectector on a drone, you could the interface the arduino over

Bob, Here is where ChipQuik helps. Add a little dab to lower the melting temperature of the solder that is there. Heat the solder up and bang the board against the your work bench. The melted solder

I hold my soldering iron on one side of the thru hole and my hand solder sucker on the other side and find that works ok now that I no longer have access to a proper desoldering station since

Please test the SMPS board off line (see my early post).

Strange. Which FW do you use? How did you get the first two Pictures? What supply voltage was shown in the Diagnostics screen (top left, dark in the picture) and what was the external voltage? 73

Something I've done in this case is heat from the underside and push the cap lead through from the top.

If you are into building it yourself, then Elektor precision power supply. Desinge from 1983, i have 2 of them 3A and 1A regulated, they work like a charm. Stable even at full load when i do audi amps

Can I replace Q104 on the 5V SMPS with a BS170 to test it for proper operation?

Chipquick low temp alloy.

Karl, please check the LPF section (see QRP Labs Wiki). 73 Ludwig

Second vote for using a toothpick. I usually heat from the other side of the board,? push the toothpick through? while simultaneously? removing the iron. Leave it in there for a moment? to keep

Some thru-hole capacitors are just SMT parts with leads and you can solder the SMT cap across the two holes... https://www.qsl.net/v/va3rr//NC40/c525.jpg

I use a round wooden toothpick to push the leftover solder from the hole ... works every time. - Bruce K1FFX

You can also just solder the cap lead to the top of the board hole. The thru plating will carry the connection on through to where it needs to be. And since this is a particularly hard one it’s

Well, I pulled the QLG3 board and inspected all connections, all looked good. I rewired it for battery power by moving the jumper. There was no change. With the antenna under open sky I get no lock.

The scope leads were on output side of T501 and ground... -- 73 Karl KI4ZUQ

I have standardized on these in my lab, I have five of them and there has never been a hiccup.? I have run them for weeks at 90% load powering a life