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From Finbar EI0CF.
Having recently put into service an ex NDB
beacon ATU, I now have a spare ATU. It suddenly struck me, how
about a tuned counterpoise. I have now erected one about 15 feet below the
antenna, but it shoots off in different directions to use up the wire, but all
at about 12 feet off the ground. The net result is an
increase in Antenna current from 3.9 amps to
4.6 amps, however I am now experiencing breakdown of the feedthrough
insulator , in the wooden window frame, causing the current to
drop back to 4.2 amps on average after a
short while on the air, I can smell the ozone and see and hear the
the blue buzz and sizzle of the arc. But it has certainly made a difference to
the Antenna current. Has anybody else experimented on LF with tuned
counterpoises.
Tonight the 28th I have a qrp
beacon running on the band, 1.4 amps. Any reports would be
gratefully received.
73
Finbar EI0CF
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