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Do I actually have a Frankenstein?? [message #21276]

Tue, 26 August 2014 09:55

Jerrybass1955
Messages: 45
Registered: August 2014
Location: NC

Member

I have been working on the tremolo and reverb issues with my K100-2 and as I dig in, I am finding some unusual things.
Like:
Significant numbers of resistor values not the same as either Rev. 3 or Rev. 4 schematics. I have found three in the reverb circuit and haven't really looked much elsewhere. None of the resistors look like obvious replacements. R162 was 33K, R165 was 150 ohms and R170 was 100 ohms (instead of 15K!).

I found an extra part - a 100K resistor that may be connected to the reverb input to ground. Maybe there are more!

Transistor locations are slightly different than the transistor location map would suggest.

Serial number is 33804
PCB says "KEI-1 PC104"

Thought I had a rev. 4, but not so sure now. What do you think? Anyone know what I have?

If it is a Frankie, is there any documentation out there that might be useful? Suggested modifications?

Any suggestions on whether I should update the values to match the Rev. 4 schematic? (already did some of that in the reverb circuit with somewhat positive results - e.g., changed R 170 from 100 ohms to 15K!)

Jerry

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