Hello:

Will be putting up a receive-only antenna (30 MHz) in my backyard.

The antenna will terminate in a Balun, and then a lightning arrestor,
immediately before the coax (8X probably)
run back to the house some 30 feet away.

Have read in one or two places a brief comment that it is a good idea to
make a few turns of the coax
right before the start of the antenna. Termed a "Choke".

If so, what is the purpose ?
Needed even if there will also be an arrestor ?

If a good idea, how many coax turns, of what diameter ?

Also a good idea at the other end, by the receiver ?

Thanks,
Bob