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From: jfw@ksr.com (John F. Woods)
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: How to switch high-voltage RF?
Message-ID: <3636@ksr.com>
Date: 20 May 91 14:11:24 GMT
Sender: news@ksr.com
Organization: Kendall Square Research Corp.
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Having recently seen an advertisement for a "smart" antenna tuner, I
became curious about how they switch the inductances and capacitances
in and out of the circuit.  Since the smart tuner claims to be good
for 300 watts, it would seem that they need switches that can
withstand several hundred volts when open, but the case seemed a bit
small for 11 high-voltage relays ("64 input capacitances, 32 output
capacitances, and 256 values of inductance"; 11 binary switches).
So, what are they likely to be using?