VintageKustom.com: Repairing Kustom Amps

Re: k200b-3 questions [message #11692 is a reply to message #11688]

Sat, 29 August 2009 11:34

pleat
Messages: 1452
Registered: June 2004
Location: Belding, Mi

Senior Member

Again, Welcome to the site. I'm not a tech but to help some of the other techs, they will first need to know what color your kustom is. LOL. You may want to state the channels as left and right channels. On your -3 head, left channel should be a straight volume, bass, treble, and bright switch. The right channel is the channel that has the selective boost and harmonic clipper. First off, if the amp is giving a loud hum, Seeing a voltage spark when you plug in the speaker leads me to think you have some serious issues with the power amp section, and may be pumping DC Voltage into your speakers and can fry them. Again I'm no tech and it may be AC Voltage, but I do know you can cook your speakers.
The popping sound when rotating the selective boost switch, is a issue that most have. In the few dash 4 heads I've owned they all did it, even after cleaning the 7 position switch. I really think you need to have a qualified tech take the amp and get the power amp working and then have him chase down why the pre amps are not working like they should. In any amps I have if I can't get something cleared up with some contact cleaner, I just take them to my repair guy and have him go through the complete amp.
Nothing worse that have the amp fail on a gig.
Don

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