Capacitor question

sniperfrommars1 · #1 09-29-2002, 04:31 AM

I found this in one of the other topics about the original jems. I was wondering if anyone has done this to an rg yet? And also where can I get one of these capacitors and what else I should know about it? Probably stew mac for the parts right?

Project Guitar · #2 09-29-2002, 04:55 AM

so what kind of capacitor are you looking for?

sniperfrommars1 · #3 09-29-2002, 05:01 AM

They also added a 331PF capacitor across the volume pot. This is so that

the highs don't roll off when the volume is turned down.

oops. Thats what I meant to add to things becalvert. Its the capacitor in the original jems. Im just looking for ways to get the electronic tone of a jem out of an rg. Of course Im probably gonna nix the middle single in favor of having both pickups on which I prefer. I like the split position sounds, but I never dug just the middle position by itself.

Project Guitar · #4 09-29-2002, 05:17 AM

As far as I know (could be wrong) the 331 is just a .02 mf capacitor

If you need one I have plenty, just send a self addressed stamped envelope to me> You can find my address by clicking here

I also have the popular .047's

sniperfrommars1 · #5 09-29-2002, 05:19 AM

Thanks your a good man. Ill do that. Have you tried this or know of anyon else who has? Very appreciative of the help

Project Guitar · #6 09-29-2002, 05:28 AM

I've done so many wiring jobs for different configurations that I dedicated an entire page to just that over here!

This reminds me though, I need to add links to the jemsite schematics.

GhesQi J · #7 09-29-2002, 05:45 AM

Quite an interesting site as far as guitar electronics go. (projectguitar.com)

Brian, the volume capacitor (labeled 331) is actually a 331 picoFarad capacitor. -> Small, round and orange. I think you mixed it up with the tone capacitor (labeled 223), value 0.02 microFarad. --> bigger, rectangular shape and yellow.
If you know a good electronics store I recommend you buy it there (normally you can buy them piece by piece, and it won't cost you anything) Sort of..

Cheers,
Joten

Elysian · #8 09-30-2002, 11:56 PM

last i checked that is a resistor soldered onto the tone knob... which is the whole reason the tone knob works... capacitors store voltage, which would do nothing on a tone knob...

Project Guitar · #9 10-01-2002, 01:06 AM

Quote:

Originally Posted by becalvert

As far as I know (could be wrong)

Won't be the last time either

sniperfrommars1 · #10 10-01-2002, 01:41 AM

Elysian its a capacitor. not a resistor. My buddy with an electronics engineering degree says so at least. He does most of the electronics work I dont want to, but hes taught me a good bit.

Lonely Raven · #11 10-01-2002, 03:46 PM

Capacitor=Filter

Resistor effects current/voltage

dcord · #12 10-01-2002, 08:40 PM

Quote:

Originally Posted by Elysian

last i checked that is a resistor soldered onto the tone knob... which is the whole reason the tone knob works... capacitors store voltage, which would do nothing on a tone knob...

It's a capacitor in the tone circuit. Capacitors work well as filters, and what the tone circuit in a guitar works out to be is a low-pass filter: capacitor in series to a resistor (potentiometer) in parallel. The amout of high-frequency roll-off is directly proportional to the size of the capacitor.

A resistor to a potentiometer would be redundant, a resistor hooked toa variable resistor. Doesn't do anything in a tone circuit...

A lot of guitars have a small resistor in parallel with the volume pot, which helps to make the volume change more smooth, as well as a capacitor to allow the highs to pass through as the volume is backed off.

~d~