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July 21st 08, 01:20 AM posted to rec.radio.amateur.moderated

Phil Kane

Phil Kane is offline

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First recorded activity by RadioBanter: Jan 2007

Posts: 300

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Something old and something new

On Wed, 16 Jul 2008 20:51:14 EDT, wrote:

There are, such as RF power amplifiers for HF and low VHF. While it is
certainly possible to build the solidstate equivalent of, say, a
single-3-500Z HF amplifier, the SS version costs more and is less
efficient.

Yet the broadcast industry is going to SS as fast as they can.
Modular in design, if one "final" module fails, the power gets reduced
but they stay on the air. If a "final" tube fails, it's February
2009 much sooner. Reduction in maintenance costs outweigh capital
investment. I don't think that you can buy a new AM broadcast
transmitter below 50 KW that isn't SS all the way, and there are
plenty of SS 50 rigs in service.
--

73 de K2ASP - Phil Kane

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon

e-mail: k2asp [at] arrl [dot] net

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