On Fri, 10 Dec 2004 14:17:27 -0800, "Jerry J. Wass"
wrote:

john smith wrote:

That and he has instructions for building one on his website.

jls wrote:
Give Jim Weir time to reply; I believe he sells a kit for an outside
aerial.

That copper tube "J" Pole works nice, Be on lookout for 58 ohm co-ax
cable. Not The TV stuff. it's 75 ohm.

You may be thinking of RG58 ... thin 50 ohm coax.

J-pole antennas are very good, but not the best for aviation ,,, they
are fairly narrow band, and just the comm portion is around 15% wide
.... likely better off with somehting with better wideband
characteristics. A cheap vertical whip cut for band center would do
fine. Consider usinb larger caox, RG8 or similar, not for power
handling, but for loss. Find a local ham and have him help you come
up with a matching bridge and use low loss twin lead ...