[AMRadio] GE 250 watt TX

John Lyles jtml at losalamos.com
Wed Dec 13 18:31:15 EST 2006

The RCA BTA250L used same modulator and RF final tube lineup and is most likely very similar circuitry. The 250L is a neat box. You can download the manual at http://sujan.hallikainen.org/BroadcastHistory/, look under RCA. Be aware that its 29Meg filesize. 


> Message: 2
> Date: Wed, 13 Dec 2006 08:34:02 -0600
> From: Rick Brashear <rickbras at airmail.net>
> Subject: Re: [AMRadio] GE

> Stevan and Geoff...
> Thanks guys.  I sent Steve (WB3HUZ) an email yesterday and hope to get a 
> reply today.  I saw that picture of the top of the transmitter, she's a 
> beauty, but I would sure like to see a few more photos.  I have 
> discovered that it utilizes a pair of 828's modulating a pair of 810's.  
> I'm not familiar with either of these tubes, but according to one of my 
> tube manuals the 810 is a triode.  I am assuming since it uses a couple 
> of 828's in the modulator it has high level plate modulation.  That may 
> be just a wishful thought, but...

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