VintageKustom.com: Replacement Part Suggestions » 3 prong cord and Hiss questions

Re: 3 prong cord and Hiss questions [message #16762 is a reply to message #16683]

Sun, 04 March 2012 13:02

stevem
Messages: 4739
Registered: June 2004
Location: NY

Senior Member

I would have to compair both schematics, but off the top of my head I think that the first 3 gain stages on each of your channels would be the same as on the -2 model head. By this I mean at least in regards to the transistors used.

The driver and output stage would be the same after all the effects stuff with out question, and some times the input gain stage transistor at the driver is the noise maker of the bunch!

Note that before you pull the circuit board off of the front to panel to work on it, there is a metal cased diode held in a clip inbetween the the two output transistors on the C channel mounting bar on the floor of the amp.
This doiode must be pulled from the clip with care, as its leads can snap off quite easy.

In fact I would first put a dab of silicone sealer over the leads at the diode and let it cure before doing anything as far as moving the board back from the front panel.
The blob of sealer will greatly aid in keeping the diodes leads from bending and snapping.

Also note the triangular black slip on connector on each output transistor, these must go back on the same way, so note which side the yellow and blue wires where at.

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