[Amps] 432 Cavity Amps; Thomson TH 331

[John Lyles]

That sounds like it would be a potent amplifier. What was the looking 
glass program?
Or would you have to shoot me after telling?

Never heard of that tetrode, but I do have a GE industrial catalog of 
loose leaf datasheets. I will check tomorrow. as I'm curious.

If it is a coaxial line circuit, and at 350 MHz, then moving it 80 MHz 
up isn't as bad as the other way. That would kick butt on 432, bounce 
off Mars, etc. and needs big air blowers for certain.
73
John
K5PRO

> Date: Thu, 1 Mar 2012 20:23:28 -0500
> From: "Carl"<km1h at jeremy.mv.com>
> Subject: Re: [Amps] 432 Cavity Amps;  Thomson TH 331
> To:<jtml at vla.com>,	<amps at contesting.com>

> GE made a big tetrode for the USAF Looking Glass program. It was the
> GL-51064, with 2750W PD and rated at 4000W CW output at 400MHz. Its capable
> of 4.2KW input at 1GHz
>
> They were used in a 1000W output AM linear at around 350MHz in a Collins
> 648B-1 which is in a standard airborn slide in rack configuration.
>
> I have 2 of the amps, refurbishd with new tubes, stored and then surplused.
> No power supplies of course.
>
> Id love to get some helping on getting one on 432.
> Tube spec sheets, and Collins schematics are on hand.
>
> The amps date to around 1987 and the tube sheet is dated 11/69 so there must
> be some out there. There is also an ET-T2009 designation on the sheets which
> may be an alternate ID or an internal code. Maybe its an European tube thats
> been rebranded for GE ??
>
> Carl
> KM1H