I don't know what class VU3RAZ is running the 4-400s, but AB1 max screen is
800V /w 750V as 'typical'
73, Bill N2BC
-----Original Message-----
From: Ron Youvan
Sent: Thursday, March 31, 2011 3:41 PM
To: amps
Subject: Re: [Amps] 4-400A low output, VU3RAZ problem
Mark K5AM wrote:
>> VU3RAZ wrote:
>> 4-400 (4-400A?) . . . 450 V DC Screen . . . 130 W output.
> Your screen voltage is insufficient. Do you have the
> data sheet, with specifications for class AB1?
> I use 810 volts on the screens and get 1200 W
> from two tubes in push-pull.
My Eimac data sheet (4-400A) says 600 Volts is the absolute
maximum screen Voltage and typical operation is 500 Volts so 450 Volts
should work.
--
Ron KA4INM - Endless Loop: n. see Loop, Endless.
Loop, Endless: n. see Endless Loop.
-- Random Shack Data Processing Dictionary
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