Rich:
Leaning on your expertise further, I have several 450THs. Would these be
easier to drive, or yield greater output for given drive, in GG?
73, Barrie, W7ALW
----- Original Message -----
From: "R. Measures" <r@somis.org>
To: "Barrie Smith" <barrie@centric.net>; "Mark Foltarz"
<Foltarz@rocketmail.com>; "AMPS" <amps@contesting.com>
Sent: Thursday, November 06, 2003 8:51 PM
Subject: Re: [Amps] Anyone ever use a 6C21?
>
>
> >
> >
> >
> >> *** A triode with a Mu of 38 is OK for linear service, but only in g-g
> >> configuration, However, the drive requirement would be higher than it
> >> would be for high-Mu tubes.
> >
> >That's interesting, Rich.
> >
> >Previously, you mentioned a plate voltage of something on the order of 8
KV
> >for linear service. I'm thinking that the 6C21/450 would be a "fun" 160M
> >only amp.
>
> ** It should work on higher bands too.
> >
> >Given that I do have sufficient drive, what do you suppose the power out
> >would/could be with 8 KV on the plate?
>
> ** Probably c. 1.5kW PEP out with 200w drive. However, if more drive
> is available, c. 2800w PEP should be possible (8kV at 600mA in x 60%
> eff., tuning pulser tuneup).
> -- The most VHF-stable design for a 450TH in g-g is to submount the
> socket in order to move the grid lead close to the chassis.
> - I have a socket if u need one.
> -- If I were building such an amplifier, I would use one fan above the
> chassis and one fan below the chassis to cool the envelope. Also, with a
> tube this old, an initial gas check with a high-potential tester might be
> a good idea.
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|