> 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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