Quarter wave sloper ?
Just to be xtal clear, when I said 1/4 wave sloper, I meant coax run up to
nearly the top of the tower, with braid to tower.....and hot side of coax
to the 1/4 wave sloping wire. Bottom of the sloping wire has the
insulator....and 6' off the grnd. NO radials anywhere. Base of tower
has 3 x 8' deep grnd rods, all cad welded below grnd, then 2 ga wire to
each tower leg. Another 2 ga bare copper wire runs from base of tower to a
4th grnd rod outside basement window..... then more 2 ga ( insulated
RW-90)..to SPG alum plate just inside the basement.
The 3 x els of the modified F12 340N (40m yagi) are INSULATED from the
35' boom. Both the REF and the DIR have a pair of vac relays and a flat
strap coil inside a nema box (one at each end of boom) to provide for 4 x
tuning segments. Insulator between the inner 40m ele halves. Both halves
are insulated from the boom. The Driven ele also has a plastic nema box,
and also a center insulator, but this time has TWO flat strap coils, and
FOUR vac relays, 2 per coil, to provide for 7 x segments. All 8 x vac
relays operate independently. Driven ele is mounted 6' up the mast.
Equal spacing from DE to each parasitic ele.
I have used 1/4 wave slopers in the past...but 75m only. Same deal, coax
to top of tower, braid to top of tower, and hot side of coax to 1/4 wave
sloping wire. Yagi just above top of tower.
Jim VE7RF
On Sat, Jul 27, 2024 at 12:47 PM jim.thom jim.thom@telus.net <
jim.thom@telus.net> wrote:
> Has anyone had success with a 160m, 1/4 wave sloper....hanging off a 90'
> tower, with a 40m yagi just above the top of the tower ?
>
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