krj wrote:

Gm1234 wrote:

"tlindly" wrote

RG8 [not 6] is MUCH bigger in diameter than RG58. RG58 is also much
mor flexable.
But I wouldn't recommend it for this length, unless a very sharp bend
is absolutely necessary.
tom



Besides that, if you ran RG8 on an 18ft Capri, it would likely turn
turtle!

Always minimise weight aloft on a sailing vessel!

GM


Might make a good mizzen mast?
Unstayed???

There is a good calculator for coax losses at

http://www.ocarc.ca/coax.htm

A 25W VHF at 156 mhz with 40 ft of RG-58 will have 15.819W at the
antenna. With RG-8X it will be 16.741W. With RG-8U it will be 19.859W.
Assuming a VSWR of 1.3
krj


Well, considering all aspects of this, RG8 foam core - WELL SEALED
might be the best choice for me.

Now, how to seal up the connectors?

Adhesive lined heat shrink may be fine for the top one, but the
deck connector? That one has to come apart occasionally.

And, it's probably the one most exposed to the spray...