2500 x 0.4 = 1 kW input! So what was the RF output that you got? You
only referred to the 100 w of drive in your note. Did you calculate
and match the plate loadline for this tube in your Swan?
K5PRO
>
>From: Bill Smith <ko4nrbs@yahoo.com>
>To: amps@contesting.com
>Subject: [Amps] 4-400A Plate
>
>I have installed a single 4-400A in my Swan Mark 1 for
>testing. I am running it Zero Bias and Grounded
>Grid(it's being used as a triode). It has 2500vdc
>plate voltage and a max of about 400ma with 100 watts
>of drive. I am curious as to others experiences doing
>this with the 4-400A. The plate gets red in SSB and
>CW with 100 watts of drive as I expected it should. I
>back the drive down but even in SSB the plate still
>gets red.
>
>73,
>Bill
>
>Resting current is about 40ma. I tested it with about
>100 watts of drive
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