Nothing but dacron on all of my base antennas.
Metal guy wires can add nasty harmonics when you transmit.
Just one reason dacron is used; the other is that it doesn't fall apart due to UV/sun exposure like other synthetics will.
Thanks....what size...5/16?
As you can see from this pic, I use them at four different angles at two different heights. Even the rope just above the beam keeping it level/straight is a leftover piece I put to work.
Yes; I think they are 5/16" dia. Extremely strong stuff that dacron. You could easily lift a V8 motor out of a car with three ropes connected. Durable too. 50+ mph winds recemtly and all that happened was they got a bit loosened. Tightened them up and ready for the next wind blast.
I bought mine from The Wireman ....