Shielding question

drewl

Old Timer

Join Date: Jun 2006

Posts: 2961

Location: Norristown state hospital
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#1

Shielding question

11-19-2009, 03:16 AM

So I got most of the hum out of this Ampeg M15 I'm playing with.
I was going to shield the input wires to the first stage. Should I attatch the shield to ground or the plate?
Which do you guys prefer?
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Chuck H

Bent Member

Join Date: May 2007

Posts: 20015

Location: pacific north west
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#2

11-19-2009, 03:29 AM

Attach it to ground at the input jack if you don't want to change the tone of the amp. IME attaching it to the plate is only good when you wan't to tank some top end at the input. The capacitance of the plate and grid via the shielded cable can be quite large. If you have the time you can try it both ways and you'll see what I'm talking about and you can decide which you like better.

Chuck

"Take two placebos, works twice as well." Enzo

"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

"If you're not interested in opinions and the experience of others, why even start a thread?
You can't just expect consent." Helmholtz
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