I am posting this to answer a few questions I received, and possibly
answer some not sent yet...
1 - The terminating resistor allows the antenna to be run anywhere in the
HF spectrum. That is apparently the source of the extra losses. You
trade overall efficiency for very wide bandwidth. It will work on odd
harmonics, even harmonics and between harmonics.
2 - The original purpose of the T2FD was for NVIS communications, so it
will provide a high-angle signal, dependant on the height of the
installation and the frequency of operation. For operation at
frequencies where the height is less than 0.25-wave, most of the energy
will be radiated straight up, so an installation up 30 feet will show
predominatly high-angle NVIS-type radiation from 7.5 MHz and down...
I wasn't going to install one, but one of the replies indicated that I
shouldn't be posting opinions of the antler without actually running
one. OK, the materials are on hand, and it will be up tomorrow. I have
been posting info from references of mine, not opinions of mine, but the
effort is minimal, so I will install one. Reports on the installation
in the next week or 3...
Happy???
72/73, Keith, WB2VUO, QRP-L #582, scQRP 40, Tech Specialist (ARRL/WNY),
ARRL Life Member, VP/BARK, Beacon Chaircritter, Rochester VHF Group
Trustee, KB2YTW/B 10 Mtr QRPp Beacon (250 mW @ 28.2870 MHz)
"In the Depths of the Great Bergen (NY) Swamp...FN13ac"
Packet - wb2vuo@w2im.#wny.ny.usa.noam
Email - wb2vuo@juno.com
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