[Amps] testing the biggest one

[Jeff Blaine]

Jim may have one of those on-line now.

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-----Original Message----- 
From: Mike Manship
Sent: Friday, August 02, 2013 7:13 PM
To: amps at contesting.com
Subject: Re: [Amps] testing the biggest one

Whatever happened to the X-2159?

http://www.cpii.com/docs/datasheets/81/8974.pdf

73 de Mike W9OJ







On 8/2/2013 3:09 PM, John Lyles wrote:
> I just concluded 3 days of observing the final testing of a new tetrode in 
> the French Thales (former Thomson) factory. I can say with first hand 
> experience that tubes will be around for a long time, at least at the 
> power levels that make sense for them. I'm not talking about broadcast or 
> even communication levels, but for industrial and scientific sources. This 
> posting may not be directly applicable to amateur amplifiers, but to 
> amplifier technology in general. On Monday the TH628 ran 600 kW key down. 
> That's with plate power of 12.2 kV Ep at 85 amps! This was up at 200 MHz. 
> In an amplifier smaller than the car I drive. I'd love to know of any 
> other technology capable of this at comparable size, cost and efficiency. 
> The perfection of the art and skill of making thermionic devices is 
> evident here. "Awesome" is all I can think..
>
> On Tuesday, the same amp ran up to 3 MW pulsed with 26 kV at 175 amps 
> plate current very linearly, 66% efficient and>  14 db gain in grounded 
> grid(s) configuration.
>
> It gets shipped to us in USA for further testing in our PA in the 
> southwest. There will be 2 more like this in coming months to test and 
> install. I'm happy to be back home but have to say that time in a big tube 
> factory dispels any notions that I continuously hear on this forum and 
> other places (broadcasters or scientists) that tubes are gone, going,& 
> dead end now. I challenge the same pundits to come up with a superior way 
> to generate RF power. Maybe in the sun?
>
> Sorry that this isn't directly applicable to our ham discussions here but 
> as amplifier builders it is more than of "academic interest", being real 
> hardware.
> 73 K5PRO
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