On Jul 19, 9:31*pm, Eric Greenwell wrote:

I'm hoping there is some way to adjust the Rainco antenna without
cutting off pieces of the whip, which has a nice ball formed on the end.


I'm sure that if you open it up there will be a way to adjust the
length without cutting the tip off. I thought I had the same antenna
as you but my sleeve is larger diameter. My measurements a

sleeve dia 1.25 inch
sleeve length 26.2 inch (insulator to base excluding mounting bolt)
exposed whip length 44.7 inch

Don't know the resonant freq or the SWR at 123.3 but I may have to
measure it now you brought the subject up.

It appears the antenna can be opened by removing a single screw that
attaches the mounting base to the sleeve. The insulated cap at the
top of the sleeve is retained by staking (center punched indent).

I have a vague recollection that these antennas originated in AZ and
were designed by Ryan. Quite a few club members were using them a
while ago. I did a search of some ham radio antenna deign sources but
didn't find exactly the same design. Sleeve monopole is the best
generic description I could find.

If you open it up let me know what you find, and/or send pictures.

Andy