My plexi kit is killin!!! Made a few changes to quiet noise

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shawnpurcell

My plexi kit is killin!!! Made a few changes to quiet noise

Post by shawnpurcell » Fri Sep 24, 2004 5:29 pm

Hey all,

My kit that I posted pics of is KILLIN!!!

After I built it I took it over to Paul Cochrane of "Tim" pedal fame. He had me do shielded input wires and shielded the wire that went from the 2 volume pots to V2. He did this really cool thing where he mounted the 2 470 resistors and cap right between the pots and ran a shielded wire directly to the V2 tube. Man, what a difference in noise!!!!

And he had me change a few grounds around to get rid of a little loop hum... I can't exactly say what I did cause he coached me through it, but what I can say is the amp is smokin' and Quiet!!!! Even pulling up the original green wires the amp was a little on the noisy side, but now it's really great!! He mentioned a few more ground loop possibilites, but I am done tweaking for now :)

I'll take another pic this week to show you guys what got changed around...

Shawn
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5150loveeddie
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Post by 5150loveeddie » Fri Sep 24, 2004 6:13 pm

Cool Dude!
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Country Boy Shane
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Post by Country Boy Shane » Fri Sep 24, 2004 6:24 pm

Ya mon, we need a pic. I know George did something similar with sheilding on my amp. We'd like to see what it looks like on yours though!
Just Feel it MAN! -Shane Gorski "Country Boy Shane"

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shawnpurcell

Here's the shielding that I did per Paul Cochrane ("TIM

Post by shawnpurcell » Fri Oct 08, 2004 2:08 pm

Hey All,

finally got this pic up. Here is what Paul Cochrane did for me. It really, really quited the amp down!!!

Image

He basically took the 470 resistors and 500pf cap off the board, connected them directly to the pots and ran a shielded wire (Shielding is under tube) and ran as short a wire as possible to V2...

The only other change I made was going to the .0022 cap for the bright channel. I am not using a bright cap across the volume control...

Shawn
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dosmun
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Post by dosmun » Fri Oct 08, 2004 5:42 pm

Paul is a really cool guy. And his TIM pedal is killer. I would really like to hear some of his amps someday that he is working on with Heritage.
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shawnpurcell

heritage amps are sounding GREAT!

Post by shawnpurcell » Sat Oct 09, 2004 12:05 pm

Hey There,

Yeah, Paul is doing some VERY cool things with the Heritage line. They are about 4 miles from me and I get over there 1 time a week if I can. I have a feeling that Heritage will be up there in the amp world very soon!

Shawn
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SteadyEddie
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Re: My plexi kit is killin!!! Made a few changes to quiet no

Post by SteadyEddie » Fri Dec 24, 2010 1:18 am

What kind of noise did the shielding fix? Was it hum or hiss?

Did shielding the input wires affect the tone or response of the amp?
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