FJA's noise gate mod is exactly that. The Peavey circuit, that is. FJA only solders his into the lead channel, while I have it elsewhere in shared circuitry because I have no clean channel to be affected negatively. I lifted it from the XXX, but the JSX has the same thing except with a pot instead of a static resistor. It's a three component circuit. I can look it up later, but I'm just home for a change of clothes and I'm going back out.
so (from memory) is it just a 1M pot with back-to-back diodes ????
I'd like to see this too.
Yeah. A 1M pot or resistor and two 1N4148 diodes, all in parallel. The diodes do indeed face opposite directions. In the XXX schematic, this little circuit is located right after the coupling cap between the 3rd and 4th gain stages. I don't have the JSX scheme on hand and can't remember where it is in that pre.
I'm going to give that 47K trick a shot tomorrow as I'm off. I just can't see having more options as a bad thing if implemented correctly.
I don't have quick access to a six-position rotary switch, but I'll also experiment with some of the values in Lee Jackson's mid-boost thing. I'm gonna hit post right now, but I'll edit in a quick scheme of that once I actually do it in a couple mins. It'll look like cr@p, but you guys should be able to read it.
Just stuck it on a tone stack I got from Google as that was the easy way out, but that's it. Everything past the previous stages Co is there, your stack may differ. I wonder what the 10M resistor is for.... Maybe to keep the caps from popping?
