Originally Posted by windcree
...should go with actual Marine
Coax or can I get away with a good quality regular coax like I use with my home setup.
Since you provide no details about what sort of coaxial transmission
line you use at your home for your amateur radio antenna, it is impossible to pass any sort of judgement on whether or not that transmission
line will be suitable for use on your boat
There really is no coaxial transmission line standard of "marine coax."
I recommend you use a non-contaminating outer jacket, a stranded center conductor, and a tinned braid shield.
Choose a cable size such that the total loss in the coaxial cable will not exceed 1-dB for the length of transmission line from antenna to transmitter. For a typical sailboat, that probably means an RG-213/U transmission line or something similar.
My preference is to avoid any cable marked as "RG-8X" as there is no standard for that marking, and the quality of the cable can be completely variable from vendor to vendor. Also, I am not particularly impressed with "foam" dielectric cables
. I worry the center conductor will migrate if there is any sort of bend in the cable, and also worry if the foam will tend to absorb moisture.
For an antenna at a sailboat masthead, I would use a metal half-wave whip antenna. The GAM ELECTRONICS
SS-2 (or SS-2 Marine) has worked well for me. For top-of-mast mounting the antenna weight and wind
area should be minimized. The GAM SS-2 does this best. The whip is easily replaced. It fastens with a set screw. The transmission line is not attached to the antenna; use a UHF-series connector (PL-259) to connect to the antenna's connector.
A large retailer that handles GAM is DEFENDER.COM.
You may need a new mounting bracket. See
Also, I have been a licensed radio amateur (K8SS) for 55-years. I have worked professionally in radio and television broadcasting as an engineer
for 43-years. I have been boating