>I have a K-40 CB antenna (approx. 50" or so base loaded whip) on my car (for
>the CB obviously !!) and I was wondering whether if I bought an SO-239 to
>BNC adapter whether it would be any good connected to my handheld scanner ?
>While driving at the moment the handheld scanner is practically useless in
>the car, unless I hold it out of the window with one hand !! I would rather
>not put another antenna on the car.
>Any ideas as to how well it would work ? My main interest is 400MHz and
>below (mostly aircraft etc.).
The loading coil [and maybe capacitor] will limit the antenna to the 11Mtr band.
You might be able to recieve from like 25 to 30MHz. If you remove thaty matching
network [coil and capacitor], it will work nice for maybe up to around 170MHZ or
so. But it just way to long for 400 [70cM].
A simple approach is to but the Ratshack(R) window mount for your *** duck.
It is a funky shaped bracket that has a BNC female on the outside, with a 6'
(or so) thin [RG-174 come to mind] coax to a male BNC connector.
The loss in such a small coax gets farily high as you go up in frequency,
but for 400 and below it works really good, given that a ducky is never a "gain"
antenna and you will not recieve the really weak signals anyway due to [almost certain]