[Amps] Tube suggestion needed - 6 and/or 2M ~500W level with800-1kv on plate?

[david feldman]

To take it back to the original interest - can the GLA1000 in this case be used as a mule to build a portable tube-based 6M amp (2M was something of an afterthought when I made the posting) of middling power level consistent with it's power supply. For this purpose, tubes are preferred over solid state, small is important, and self-contained is important. The GLA1000 is on hand, and from a project perspective, it seems interesting to me. What I've gathered so far is that there are probably no clearly-suitable tubes as a starting point (the 1KV plate voltage being the main barrier), and most likely the project will go no further (SB-200's converted to 6M are common enough and although a little larger, wouldn't have the new-design engineering challenges.)

Thanks to everyone for the various insightful suggestions and discussion!

Dave

> Subject: RE: [Amps] Tube suggestion needed - 6 and/or 2M ~500W level with800-1kv on plate?
> Date: Sat, 21 Jun 2008 14:20:20 -0400
> From: hmandel at barantelecom.com
> To: km1h at jeremy.mv.com; wb0gaz at hotmail.com; amps at contesting.com
>
> {snip}
> One idea Ive not tried is to take a regular 4CX250B and remove the
> radiator (they are soldered on) and then make up your own solid block.
> Or saw off one side of fins and replace with a brass plate. Then mount a
> muffin fan on top of the cabinet to draw out some heat thru the
> remaining fins while another fan blows on the heat sink.
> {snip}
>
> Doesn't all this sound cost-inefficient, somewhat?
>
> Are you in desperate straits to get this particular
> machine configured with so irregular a design?
>
> My next question is directed towards the
> RF Circulating Current model, as yet-unbuilt,
> that extensive modifications in an untried
> cavity will produce......
>
> However, science for the benefit of learning
> is fruitful at any expense.
>
> "The operation was a success, but the patient died."
>
> Good hunting, "hals und beinbruch!"
>
> Harold Mandel
> W4HBM

_________________________________________________________________
Need to know now? Get instant answers with Windows Live Messenger.
http://www.windowslive.com/messenger/connect_your_way.html?ocid=TXT_TAGLM_WL_Refresh_messenger_062008