[Amps] SB220 "A" mods

[jeremy-ca]

----- Original Message ----- 
From: "Lee Buller" <k0wa at swbell.net>
To: <amps at contesting.com>
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.

Carl
KM1H