AM503 Gotha!



I will be selling some current probe goodies soon and decided to fix up some AM503s. I replaced some bad caps in the power supplies and adjusted the + and - 16v supplies. I then noticed the X1 light did not come on. The bulb checked open with an ohmmeter, no problem. I found my old stash of 10V lamps and replaced it. Still no workie. After 2 or 3 hours of head scratching I realized the X1 lamp must have a good X10 lamp for the switch to work. Replaced the X10 lamp and all is okay.

Jerry Massengale