Hi Bruce, KE0LX
The pilot lamps PL1 and PL2 for Meters M1 and M2 are connected to terminals 4 and 5 of transformer.
To replace a lamp with a led connect the anode A of a led to katode K of a diode and katode K of led to anode A of diode then connect a 1.5 k resistor in series.
If only one withe led is not sufficient to well illuminate the dial connect two or more led in parallel reducing 1.5 k accordingly.
I have not tried it on bench but it should work.
withe led |--------A-|>|-K-----| 4 ---------| | 1.5 k | |--////------5 |--------K-|<|-A-----| 1/4 W diode 1N 4004 73" de
i8CVS Domenico ----- Original Message ----- From: "charter" willmarbrowns@charter.net To: amsat-bb@amsat.org Sent: Tuesday, September 18, 2007 4:41 PM Subject: [amsat-bb] G5400 meter lamp mod
Hello...does any one have a copy of replacing meter lamps with LED's. Any help appreciated. Tks Bruce ke0lx Amsat #30873 _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb