Avoiding More Popped Fuses

Tech Square

Technical and speculative discussion of amps, cables and other topics.

In Reply to: Dead output transistor wasn't dead at all . . . amp repair posted by JTB on July 8, 2006 at 17:10:29:

When troubleshooting power amps, I avoid going through a box of fuses and a box of new output xistors by inserting an incandescent lamp in series with the AC input. Depending on the amp's normal idle current drain, I choose a lamp wattage of between 60 to 100 watts. A short in the amp will light the lamp brightly but should safely limit the current through the outputs. Sometimes I use an old 150W photoflood if the device I'm working on draws significant idle current. When cold, a filament has pretty low resistance so I also use a 'Variac'.

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Topic - Dead output transistor wasn't dead at all . . . amp repair - JTB 17:10:29 07/08/06 (1)

Avoiding More Popped Fuses - Marty 19:25:54 07/13/06 (0)

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Avoiding More Popped Fuses - Marty 19:25:54 07/13/06 (0)

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