[Amps] max plate voltage for 4cx800a/GU74B

[R.Measures]

**  I would run it at 3100v, but only for SSB and CW.  For RTTY, I would 
run less.  .  

>I'm in the process of upgrading my 4CX1600B amplifier deck to a pair of 
>4CX800a/GU74Bs.
>The maximum plate voltage for the 4CX800A is 2.5 kV per the data sheets. My 
>existing power supply voltage is 3.1 kV unloaded and 2.8kV loaded at 800 
>ma. My 
>question for the group is has anyone tried using the 4CX800A at these higher 
>voltages with any success?
>I'm trying to keep the existing transformer and there is no way of lowering 
>the secondary voltages via taps. The HV supply is a full wave bridge 
>capacitive 
>input circuit and there isn't enough room for a HV choke so it's either run 
>the tubes at 3.1kV/2.8kV or replace the transformer.
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