VintageKustom.com: Repairing Kustom Amps » Kasino U100-P

Tue, 30 May 2017 15:03

mindofone
Messages: 3
Registered: January 2016
Location: Texas

Junior Member

I've been digging into a Kasino Club U100 PA amp recently. The biggest issue (among several) is that the reverb doesn't work. Much to my surprise, once I opened it up - there is no reverb tank. I can't find any photographic evidence that any other Kasino U100 were supplied with tanks (or perhaps the amps are common sources for reverb tanks transplanted into other amps).

Anyone with an original, un-molested Kasino Club that has a reverb tank?

Also, after replacing the two large power filter caps, the amp continued to produce a fair amount of white noise. From others suggestions, I replaced the four PET8002 (equivalent) transistors on the PC803 Reverb board with 2n3904s. As expected, the noise floor dropped dramatically. Although not as much as I would ideally like.

Next I replaced the PET8002 (equivalent) transistors on the PC900 power board with 2n3904s and the two 2n4249 transistors with more modern 2n3906s. Even more reduction in hiss (I think - tough to make an unbiased, scientific measurement. After doing all that work, I'm hopeful there is now even less hiss Smile

Anyone looked at making some sort of discrete low-pass filter for these amps to eliminate the white noise that is apparently inherent in the design (or at least the original parts selection)?

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