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#1 2014-02-13 16:49:07

doug_olitsky
Member
From: Gold Coast, Long Island, NY
Registered: 2009-02-19
Posts: 45
Website

Rf Elimination for V2, V4, V4B and VT22

I was reading the AmpGarage forum and rf eliminator circuit that was supposedly designed, but never implemented was mentioned.

read it here...

http://ampgarage.com/forum/viewtopic.php?p=181599

the link points to Rick Onslow's page as one of his services offered

http://www.rickonslow.com/Content-TubeA … 32-56.html

does anybody know about this, Rick mentions that the pcb already has the traces for this circuit and it seems that all need be done is to stuff the parts.

Anybody ever do this or have it done?

Doug

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#2 2014-02-13 18:41:36

hangman
Banned
From: Seattle Washington
Registered: 2006-09-04
Posts: 1848

Re: Rf Elimination for V2, V4, V4B and VT22

There was a thread on here years ago about it.  The circuit basically consists of a grid resistor and capacitor.  I have put them in using ampegs recommend values and even bumped the grid resistor up considerably.  I didn't notice a big difference.

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#3 2014-02-13 23:35:42

doug_olitsky
Member
From: Gold Coast, Long Island, NY
Registered: 2009-02-19
Posts: 45
Website

Re: Rf Elimination for V2, V4, V4B and VT22

OK got it, I looked before asking, but could not find

I guess I don't need to bother, my v4 is rather quiet


Gracias!

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#4 2014-02-13 23:54:20

doug_olitsky
Member
From: Gold Coast, Long Island, NY
Registered: 2009-02-19
Posts: 45
Website

Re: Rf Elimination for V2, V4, V4B and VT22

OK I found the thread and from my reading of your post I may already have it.

I date my v4 as '68-'69 based on what I can gather from cosmetics and internals

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