IN case my answer wasn't adequate and you wanted a calculation...
1500 OUTPUT PEP including the power lost to the conversion.
If you say 50% efficiency in a class A (people can argue either side of
this) You would need to heat up the shack with 3000 watts.
I would never consider doing this.
Flip the FT-101 and Al-1200 on CW, cut the plate lead south of the plate
choke and bolt in a 1500 Watt audio modulator and have a ball...
May I suggest a pair of 4-1000A's in push pull for the modulator? It would
look way cool on the desk and it would give you up to 2500 watts of audio. A
pair of 6146's in push pull would drive it very well. You've got more room
to build a YC-156 or other large final...
Now look here you've got me all excited.
BOB DD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of kenw2dtc
Sent: Wednesday, November 08, 2006 12:41 PM
To: amps@contesting.com
Subject: [Amps] class "A" RF amp question
If one were to build a class "A" RF tube amplifier capable of producing an
AM signal of 375 watts carrier and 1500 watts PEP, what would be the plate
dissipation required by the tube? (I know how stupid and inefficient this
is, but I really would like an answer).
As background, I have an AL-1200 (3CX1200A7) which starts to flattop beyond
375 watts of carrier at 100% modulation and this amp is class "AB2", so I
know class "A" would require significantly more dissipation than 1200 watts.
73,
Ken W2DTC
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