Several tubes developed for specific military and commercial applications
appear to have arbitrary frequency and other specs based upon the original
request.
An interesting one going back to WW2 is the 803.
Carl
KM1H
----- Original Message -----
From: "N1BUG" <paul@n1bug.com>
To: <amps@contesting.com>
Sent: Wednesday, November 17, 2010 6:18 AM
Subject: Re: [Amps] 2010 Handbook
> Roger (sub1) wrote:
>>> 4CX1000A?
>>
>> 4. It uses an oddball socket
>
> I once built a successful 160-10m amp around a 4CX1000A with no
> socket at all. OK, it took 10 minutes to change out the tube, but
> you rarely if ever have to replace one.
>
>> Maximum frequency for full power is only 110 MHz, but I believe
>> it will operate at 144-147 MHz at reduced ratings and a pair in PP will
>> easily run more than the legal limit.
>
> I ran a single 4CX1000A at legal limit on 144 MHz for years, never
> had any issue at all with it. These tubes have also been used at 222
> MHz, though one doesn't see that too often.
>
> 73
> --
> Paul, N1BUG
> Aurora Sentry: http://www.aurorasentry.com
> Piscataquis ARC: http://www.k1pq.org
> N1BUG: http://www.n1bug.com
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