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K-150-8 4x10 combo repair [message #25399] Thu, 11 August 2016 23:33 Go to next message
myersbw is currently offline  myersbw
Messages: 2
Registered: August 2016
Location: SW Ohio
Junior Member
My first post here. Well, I'm grateful for the posters in this forum. I gleaned and found many good tips. My background is engineering tech, but I haven't used it in years. Last couple of years I decided to earn a bit extra building & modding amps & pedals. Well, this Kustom 150 4x10 combo came to me with the reverb/trem channel dead. After some signal injection, the culprit turned out to be the two jfet's in the trem section. It was a minor pain, but I found I could ease the board out past the power lamp socket tabs.

Once that was repaired, I cleaned the pots and replaced the power cord with a grounded one. (Go figure I actually HAD one lying around that was a grounded black cord about 10' long!...good enough!)

Once "tool" I liked using was my iphone 6. I would break the connection with a .1uF cap into a test lead micro clip and that allows me easy injection of a signal along the way. Divide & conquer being the best method to isolate the area quick.

Overall? This amp was in pristine shape cosmetically...black pleats were flawless! Interesting amp! Can't wait to shove my guitar into it tomorrow for a final test. Smile

Cheers!
Brad

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Re: K-150-8 4x10 combo repair [message #25404 is a reply to message #25399] Fri, 12 August 2016 06:29 Go to previous message
stevem is currently offline  stevem
Messages: 4775
Registered: June 2004
Location: NY
Senior Member
Nice repair work!
If all of its speakers are good it should put a smile on your face to strum through it!

On these old multi speaker amps you should check that the speakers are still wired right to give a 8 oh load, or even that they are indeed all still working!

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