[Boatanchors] 811's verses 572bs

[jeremy-ca]

Yes, as long as the plate voltage remains the same as for the 811A's they 
are a direct swap.
This holds with all USA built 572B's and current production Chinese. 
Svetlana and a few older Chinese may need  an operating and cut-off bias 
change to be stable.

Carl
KM1H



----- Original Message ----- 
From: <k8omo at juno.com>
To: <boatanchors at mailman.qth.net>
Cc: <kd8bbk at aol.com>
Sent: Sunday, March 16, 2008 10:58 AM
Subject: [Boatanchors] 811's verses 572bs


> I know 572s are heavy duty more plate voltage and current but can they
> be a
> direct replacement for 811A s  without changeing the componets in
> the amp?
> _______________________________________________
>