Hi Frank,
See July 1992 QST, page 35, Sept 1992 QST, page 88,
See July 1996 QST, page 32 and the follow up article
in Dec 1996 QST....also 2001 ARRL handbook, page 20.13.
VE3ERP has a computer program in his library of programs
that allows computations....but really, I found it quite
easy to wind and resonate the coils with a bit of cut
and try. A MFJ 259B with an outboard "dip" circuit
really make the job easy.
So, there you have it...go for it!
73,
Charlie, N0TT
On Sat, 15 Sep 2001 01:35:29 -0400 Frank Norton KB8XU
<franknorton@home.com> writes:
>
>Hello to all,
>
>I was able to purchase a Spi-Ro D-162 dipole for less than the cost to
>buy
>the wire, center insulator, and dog bones for hanging the14G
>copperweld--local ham didn't realize what 205' looks like, hi hi.
>
>The dipole is very well built except the traps for 80M are rated at
>only
>600 watts. My thought is to purchase or wind traps that would handle
>1KW+
>SWR fluctuations. Weight and size seem the limiting factors here,
>agree? A coaxial wound traps/coils would probably weigh 8-10 lbs each
>
>using RG 211. Teflon might work, yes? Others perhaps?
>
>My hopes are to use the dipole in various configurations--full wave on
>40
>M--1/2 wave on 80M, Last but most important drooping ends to finish
>the
>full length (perhaps 16' at each end or? It will fit almost as a flat
>top
>at 40-45 feet, I have to bend it slightly in the horizontal plane to
>access
>support structures.
>
>Any suggestions for coil or trap loading appreciated.
>
>Tnx es 73 de Frank KB8XU
>
>
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