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@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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