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Old 04-12-2017, 12:38 AM
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majoco majoco is offline
Join Date: Dec 2008
Location: New Zealand
Posts: 2,672

Most of the aircraft beacon transmitters and antennae that I've had anything to do with used "Twin-T" type antenna. Some had the transmitter hut directly under the antenna which meant you could have the tuner in the hut, others had the transmitter in one hut fed by coax to the tuner in a smaller post mounted box with the tuner in it. Whatever the system, the antenna was the weak link as usually just not big enough. Currents at the base were quite high, often run in copper tubing out to some large ceramic insulators.

Here's some info...
Cheers - Martin ZL2MC - Palmerston North
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