Jerrold - CA-50T Microphone Preamp  [schematic]

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tictac
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Post by tictac »

My next door neighbor was cleaning out his mother-in-laws garage and gave me a non-functioning Jerrold P.A. amplifier. It has some interesting mic preamp modules that clip into the chassis. I drew up a schematic and it looks kinda familiar; maybe Rangemasterish, Fuzzfacish, kinda thing?
Seems like a little tweaking could make a nice little noise maker; What do you think?
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Jerrold micpre.JPG
Jerrold Mic Pre Module.JPG

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jwpartain1
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Post by jwpartain1 »

Plug into to and play it!

If you don't like it, pull the 15k feedback resistor and see what happens.

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mictester
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Post by mictester »

jwpartain1 wrote:Plug into to and play it!

If you don't like it, pull the 15k feedback resistor and see what happens.
Better yet, pull one end of the 15k feedback resistor and put in a 100k pot wired as a variable resistor. You'll get a variable fuzz effect!
"Why is it humming?" "Because it doesn't know the words!"

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tictac
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Post by tictac »

It kinda reminds me of a Colorsound Powerbooster / Overdrive circuit which has a 12K feedback resistor like this one. Yea... gotta play around with this thing :horsey:

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