Originally Posted by moonchaser
i have ask questions, listened, studied, read, etc everything i can find in an attempt to inexpensively yet effectively fashion an ssb
antenna without cutting my back-stay. so far it appears the most economical yet effective method is to simply attach a 40'+ stranded copper wire from the mast
top to the antenna tuner & a ground wire to a thru hull
or copper ground shoe. from what i can gather this appears to not be as complicated as some let on. eton / grundig even suggests this very method in their operators manual for the satellit 750 receiver. can anyone comment on this idea?
A couple of things here.
What you're doing is creating a random-length wire antenna system from the top of the mast
down to the tuner, and using the the ground wire and lower half of the boat as the reflector. Essentially a simple, random-length dipole antenna.
The only issue I have is... is the mast metal, and is it grounded to the same place you're connecting your ground too.
I ASSUME you're using an insulator between the wire and the top of the mast (right?) and if so good.
However, the mast is likely grounded directly to your boat ground either via the stays, through some wiring
(lighting rod?) or perhaps if you have a VHF
antenna up there, the braid in your coax is eventually connected to the mast? There's a lot of possibilities.
The last thing, your mast will tend to couple any RF from the antenna and when the tuner works to find it's tune point it will include that mast as part of your radiation element.
Just some things to consider.