[Antennas] Optimal longwire for QRP

2002年5月12日 15:21:59 -0400

At 10:36 AM 5/12/2002 -0500, George, W5YR wrote:
>I also use parallel shock cords on all my tree-mounted antennas and so far
>they have lasted for several years with no problems.
>>I strongly recommend that you use either several cords in parallel or use a
>slack "safety" rope in parallel with the cord(s) just in case they should
>break or whatever. So, far, I have used only two (belt and suspenders!)
>cords at each end of my major tree mounted antenna and both are still in
>like-new condition after several years of service and weather exposure.
>>Charles and I have must think alike in several ways - I also use standard
>THHN #14 stranded "house" wire for all my antennas with excellent service
>and reliability. Can't beat the cost at 15ドル for 500 ft at Home Depot.

I ended up with 6 shock cords in parallel. I started with one and kept 
adding until it seemed right. I use #14 stranded insulated for the wire 
antenna like George did, but got some #14 insulated stranded super flexible 
antenna wire, and it is on the G5RV which is about 4' too long for the 
space, so it goes around a boat pulley and down the mast. Probably affects 
the pattern about 0.2 DB. The tree is on the opposite end, also with six 
shock cords in parallel and no weight.
73, Chas, W1CG