Eimac made a series of cavity amps for the early cell phone industry using
the 3CX400U7; 2 can be moved to 903.
Ive seen mention of others but havent looked for them.
There are a few commercial cavities using the RCA 7213 that will make 1296
but they are hard to find.
Carl
KM1H
----- Original Message -----
From: "Paul Decker" <kg7hf@comcast.net>
To: <amps@contesting.com>
Sent: Sunday, April 18, 2010 8:44 PM
Subject: [Amps] care and feeding
>
>
> Hi guys,
>
>
>
> I'm reading over the Eimac "Care and feeding of power tetrodes" because it
> came up in a search I did.
>
>
>
> page 8, figure 17 shows a cavity and says "Schematic cavity section of
> 1250 Mc. amplifier employing 4x150G tetrode"
>
>
>
> Does anyone have any information on a 1250 Mc cavity amp? Did eimac
> actually make the cavities or was that up to the end user? Roughly what
> could I do to figure out what frequency a cavity is for?
>
>
>
> thanks,
>
> Paul, kg7hf
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>
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