On 11/26/2010 7:17 AM, kf6e@mail.com wrote:
The problem was that I had a random wire antenna in my attic and
wanted to use it on several bands. The impedance was low on one band
and quite high on others. A transformer to change the impedance seen
by the rig would only have worked on one band.
Certainly, but it was only needed on one band. Might have needed a
switch or relay to switch it into the circuit for that band.
(I calculated the
initial length of the wire as follows: I started in one corner of
the attic, and when I got too tired to go on, I stopped and cut the
wire.) I subsequently tried adding some length in small increments,
and improved the loading somewhat, but never got it very good. I
replaced it with several center-fed dipoles, which not only load
better, but perform better both on receive and transmit.
Moral of the story: don't buy a house where outdoor antennas are not
allowed, no matter how much the XYL insists.
By the way, the LDG AT-600 Pro is for sale, since I now use a Ten Tec
Centurion amp with the MFJ-998.
73, Frank KF6E
73, Jerry, K0CQ
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