My back fence is 50 ft from the rear of the house and not enough room on the property for 80 meter wire antenna must less a 160 meter one, and this to work great with the sloper wire attached to a fence, I also use monofilament (non-conductive) line like fishing or Weed Eater line as support for the PVC tubing on the top of my house.
I have used with 100 watts and use with 1500 watts with the amp and at this time melt down…!!
Cut the length of the sloper to the freq. where you want to operate at.
My sloper is approx. 68.5 ft. at 1853 with a 1:2 to 1:3 +/- 25 to 35 kc with no tuner, this is better than my ½ wave dipole, looks like the sloper will vary to each installation…..I also tuned the ground wire with an 18 uh roller inductor that allowed me to move +/- the center frequency, didn’t’t try but a fixed coil with a switch possibly would work over wider range…
I’m in process building another one with a remote switch to select coil windings to move up and down 160 or possibly even 80/75 meters, more at eleven.
If anyone is going to try one, I have worked out a system on winding the wire on the PVC pipe using a variable drill…
NOTE: The last couple that were built I used 2” PVC pipe with the same 70 Ft. of wire wound with the 1/2″ spacing….just made the pig tail longer by 7” (Just tune to operating frequency.) the 2” PVC is better for mechanical stability…..
CAUTION: IF YOU MOUNT THE ANTENNA MECHANICALLY COUPLED TO A STEEL VENT PIPE AS SHOW IN “THE PICTURE DON’T USE THE CRAPER WHEN IT’S STORMING OUTSIDE…!”