On Sun, 02 Jan 2005 14:19:17 GMT, "pegge"
wrote:

I´m planning to build a new multi-band antenna, and found something
entirely new to me , an antenna like a w3dzz but with ´stubs´instead of
traps. Take a look at www.g3ycc.koroo.net/lattin.htm
Should be possible to build with wires and spacers?
Anyone know (and uses!) this antenna?
I also have been thinking of a T2FD-ant, tips on
inductance-free resistors tnx, someone built a smart T2FD?
(smart meaning simple solutions for R and feeding (coax) )


The URL above is in error - it should be
www.g3ycc.karoo.net/lattin.htm

I have built such an antenna, but I used the 1 inch wide window line
(450 ohm) instead of the 300 ohm foam filled. This should have 0.95
velocity factor instead of 0.8, so the sections had to be
proportionally longer. My dimensions are as follows:

A = 9.9 meters
B = 5.0 meters
C = 2.5 meters
D = 2.9 meters

I built it to be used as a hanging vertical fed against ground, but
have not been able to get it hung properly as yet. At the moment, for
test purposes only, it is hanging in a catenary with the high end
about 15 ft above ground and the feed point is at ground level and fed
agains a good earth ground.

Resonances occur at 2.96 MHz, 6.52 MHz, 10.12 MHz, 12.5 MHz, 19.46
MHz, and 28.57 MHz as measured with an MFJ Antenna Analyzer. I explain
the low frequency resonances being lower than the design values as
being due to the fact that the antenna is almost horizontal and not
very high. If I can get it hung vertically, I expect it exhibit
resonances closer to the design values.


Bob, W9DMK, Dahlgren, VA
http://www.qsl.net/w9dmk