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Re: Repair [message #23926 is a reply to message #23924] Fri, 25 September 2015 20:25 Go to previous messageGo to previous message
OldSchool1 is currently offline  OldSchool1
Messages: 35
Registered: September 2015
Location: East Coast US
Member
guys, bear with (or humor) me on this. i tested solder joints with a wood probe while amp was on, speaker plugged in and limiter bulb on full bright. nothing seemed loose or made the bulb flicker. so i then thought let me test the cab because it is almost 50 years old. so i plugged the bassman head in and fired it up and everything worked fine. so then i thought ok, let me go back and test the kustom without the limiter. i said this is not a proper way to go about this but i can live with burning a fuse so i plugged the kustom straight in to the wall outlet, disconnected the amp lamp green wire to the filter cap so i could save the bulb and plugged speaker and guitar in. turned on the amp expecting anything and she fired up. waited and then turned volume up and played a note and everything worked. tested on/off several times and then each of the 4 high/low input jacks on each channel and all worked. the amp has been running now for 30 minutes. i think i did something to my limiter when i put it away last week after my initial tests.

i now think that either 1) there was a bad/dirty connector on one of the wires that were disconnected and then reconnected step by step as advised here taking measurements along the way which was causing the fuse to blow or 2) the lamp bulb was bad and caused a short or 3) i had replaced the original fuse (with the 2 leads at the ends) which was soldered directly to the on/off switch and replaced with a car fuse holder or 4) all of the above.

there were a lot of disconnect/reconnect things going on through my testing and each connection i shot with deoxit. would you guys agree with this? could a dirty oxadated lead connector on the rectifier or filters or transistors cause the fuse to blow?

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