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Old 17th Feb 2012, 12:28 pm   #10
M0AFJ, Tim
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Join Date: Mar 2006
Location: Helston, Cornwall, UK.
Posts: 301
Default Re: Valve Linear Amplifier project

Quote:
Originally Posted by GMB View Post
If you want a really impressive 200W linear that has the extra advantage of not requiring any tuning at all, then why not try a distributed amplifier?

I have some notes of one I saw consisting of eleven 4CX250B's which gives a minimum of 200W continuous from 10KHz to 220Mhz, so covers a few bands!
We build these type of amplifiers for use in broadband high power systems used for EMC testing, they work well but harmonics in band are a problem, -15dBc!.
It might be worth looking at some of the Russian GU series valves, cheap to buy and very robust

Tim M0AFJ
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