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VintageKustom.com is your source for literature and information on the tuck-and-roll vintage Kustom amps from the 60's and 70's, as well as their related products such as guitars and organs . We provide a webboard for help with kustom gear history, technical information and repairs as well as discussions with other collectors.

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Re: Repair [message #28497 is a reply to message #28494] Thu, 07 April 2022 07:27 Go to previous messageGo to previous message
stevem is currently offline  stevem
Messages: 4744
Registered: June 2004
Location: NY
Senior Member
In this model amp( and many other Kustom's ) only the rca cable used on the output side of the tank should have its outer cable shield making a connection from end to end.

If the cable used on the input side is the same then you will have a problem making ground loop taking place.
The input cable should not show a connection being made from the outside of the preamp board mounted rca jack to the pan's rca jack.

If you look in this sites schematic section at PC1000 you will see how it needs to be wired.

The condition your having of the volume decreasing leads me to think that your tank has a problem, or it's a replacement tank of the wrong type .

Is there a date code on the tank?

With the output cable plugged in and the reverb turned up if you bang on the tank hard do you hear the reverb springs crash?

Let's get this issue ironed out before we go back and look at what may be a hiss problem.

[Updated on: Thu, 07 April 2022 07:31]

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