[Amps] 4x813`s in GG

[Fuqua, Bill L]

A  good example of running tubes over the published Plate voltage limits is the E.F. Johnson Viking 500 plate modulated AM transmitter.
The final tube 4-400 and the modulator tubes 811A's were run with 2kV on the plates.

73
Bill wa4lav
________________________________________
From: amps-bounces at contesting.com [amps-bounces at contesting.com] On Behalf Of Bill, W6WRT [dezrat1242 at yahoo.com]
Sent: Monday, July 27, 2009 2:30 PM
To: amps at contesting.com
Subject: Re: [Amps] 4x813`s in GG

ORIGINAL MESSAGE:

On Mon, 27 Jul 2009 18:38:35 +0100, jonathan white
<jonathan.white20 at btinternet.com> wrote:

> Anode volts will be around 2,800 volts

REPLY:

You probably can get away with it, but the manufacturer's data sheet says 2500
VDC is the max allowed. There probably is a little cushion there but I wouldn't
push it too far.

73, Bill W6WRT
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