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Re: [Amps] SB220 "A" mods

To: "Lee Buller" <>, <>
Subject: Re: [Amps] SB220 "A" mods
From: "jeremy-ca" <>
Date: Fri, 28 Mar 2008 10:33:32 -0400
List-post: <">>
----- Original Message ----- 
From: "Lee Buller" <>
To: <>
Sent: Friday, March 28, 2008 9:10 AM
Subject: Re: [Amps] SB220 "A" mods

> And......
> You might look at the following after understanding the amp fully.......
> Removing the grounded grid circuitry and just grounding the grids.  After 
> all, it is a grounded grid amp.

There are 2 schools of thought on that. I prefer to leave them original. The 
trade off is about 50W.
Ive converted several hundred to 6M over the past almost 40 years and they 
are 100% stable just as Heath designed them.

I have also received several other conversions in here that "blew up" and 
all had grounded grids. And a bunch that didnt survive HF contest use.

And I certainly wouldnt use the AL-82 as a model of stability.


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