[AMPS] New to the Amps list

Joe Subich, K4IK k4ik@subich.com
Tue, 22 Jan 2002 15:07:22 -0500




> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]
>     On Behalf Of Tom Rauch
> 
> 572B's are a good mod to the 811 amp, they make it almost bullet 
> proof. It is a cheap way to pick up the most power gain per buck. If 
> your signal is marginal, the first few hundred watts more makes the 
> biggest difference.  
> 

Tom, 

Does the AL-811 have provision for raising the plate voltage by 800 
to 900 volts to be more compatible with the 572B?  As I recall an 811 
generally operate at 1200 - 1400 volts where the 572B likes about 2200 
volts ... at 1400 volts the 572B is not much more than a rugged 811.  

According to the charts I have the amplification factor of the 572B 
is only 170 vs. 160 for the 811. 

73, 

   ... Joe, K4IK 


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