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#24
July 24th 08, 09:06 PM
posted to rec.radio.amateur.moderated
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Something old and something new
Phil Kane wrote:
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. -- We hams are starting to see some higher power amplifiers available but at rather breathtaking prices. I've drooled over a couple of the Tokyo Hi-Power offerings and I have a friend running the Yaesu Quadra. I think the MFJ/Ameritron folks will need to get into the solid state amp game before we see *affordable* solid state amps with outputs of 1 to 1.5 KW. Only when that happens will I make my move to a solid state amp. Dave K8MN |
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