VintageKustom.com: Comment Board » J 595 Comes to my shop....

Re: J 595 Comes to my shop.... [message #27340 is a reply to message #27335]

Sun, 26 May 2019 14:55

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

Congrats on the new baby!

The schematic is in the technical section, mislabeled as a K200A. There is a hand written note, "Wide Panel" on it.

The small pc board on the rear panel is the power amp driver circuit and the 24 volt regulator for the preamp power supply. The blue lytic cap on the board has been changed already, as that one is a very common driver circuit failure.

The dual pot on the treble control is an interesting take on the traditional tone controls. The second pot adds a sort of bright switch to the end of the rotation of the treble control. It adds in a bypass cap to the circuit that boosts the high frequencies and unfortunately the hiss as well.

Please note that until the metalfront 150/250 series amps, the high and low inputs on all Kustom amps were not gain labels but tone labels. The high input cut the low frequencies out of the input signal giving it a bright channel effect.

Just my 2 cents, change the power cord to a 3-wire and remove the line cap.

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