Tube Amps / Music Electronics
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|6/6/1999 7:10 AM|
I have a 4708, which is about the same. The trem is great if you can get it working. The oscillator caps have probably gone bad or the tube has gone. I have a hand drawn schematic, but it hasn't been scanned . Somewhere out on the web it a society of organ techs that has the schematic listed for sale, but I can't find the link. The trem is very similar to the magnatone type. It uses varistors. That part of the circuit is similar to the one on page 424 of "A Desktop reference of Hip Vintage Guitar Amps" by Gerald Weber. The Third triode in the signal chain is what I am refering too. The rest of that schematic is totally different.
I have used a 12AX7 in mine instead of the 12DW7. The problem is that it seems to make the input have more gain, and the amp distorts. You might like this.
|6/6/1999 7:12 AM|
OOPS! I posted in the wrong place
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