[AMRadio] RF Amp

Barrie Smith barrie at centric.net
Tue Dec 5 18:55:45 EST 2006

----- Original Message ----- 
From: "Rick Brashear" <rickbras at airmail.net>
To: <AMRadio at mailman.qth.net>
Sent: Tuesday, December 05, 2006 3:07 PM
Subject: [AMRadio] RF Amp

> I am thinking about putting a couple of 450TL's in push pull for the low
> bands only.
>     * Has anyone here had experience with that configuration?

Yes, I built a pair of 450TH, modulated by a pair of 304TL, several years
ago.  The transmitter worked well, even non-hams could hear it for miles,
often without formal receiving apparatus.

>     * What would you suggest for a driver?

I used a Collins 32V3 for both RF and audio.

>     * Do you think a couple of 250TH's would do to modulate it?


73, Barrie, W7ALW

> It's just in the thinking stage right now, but I have some pretty big
> iron I'd like to make use of and at least one 450TL and one extra 250TH.
> Thanks for any advice...
> Rick/K5IZ
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