Lee,
A **SINGLE** tube may run up to 100 ohms. A pair will be 50 ohms or less.
Depends on a lot of things though.
A broadband match will hurt the amp's efficiency vs. a L/C style matched
input with a low Q.
73/jeff/ac0c
--------------------------------------------------
From: "Lee Buller" <k0wa@swbell.net>
Sent: Sunday, March 14, 2010 3:30 PM
To: <amps@contesting.com>
Subject: [Amps] GI7B Question - Input Matching
>
> I have been reading about the GI-7B Russian made tube. It seems that the
> input impedance of two tubes is around 100 ohms. Could you not just use a
> 2:1 transformer to make a match from 50 ohms to 100 ohms? What am I
> missing here.
>
> Lee - K0WA
>
> Ham Radio Operators: Kansas QSO Party is August 28-29, 2010. See
> www.ksqsoparty.org for details
>
> In our day and age it seems that Common Sense is in short supply. If you
> don't have any Common Sense - get some Common Sense and use it. If you
> can't find any Common Sense, ask for help from somebody who has some
> Common Sense. Is Common Sense divine?
>
> Common Sense is the image of the Creator expressing revealed truth in my
> mind. - J. Wolf
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|