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 [email protected] < [email protected]> 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 ? > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
