In article
,
"alexander.keys1" wrote:

On Feb 26, 11:49 am, "Greg" wrote:
I'm a newbie upgrading to a 3GHz scanning system so I'm no looking round
for recommedations and feedback on antennas that perform
up to 3GHz. I would rather spend extra for a professional level antenna
than go for a cheaper option. The AOR DA5000 looks good
but I'd appreciate any tips before I start shelling out money. I'm
currently scanning with a D130 discone which works well but it
only goes up to 1300MHz. Thanks for any advice.

You will be lucky if you pick up ANYTHING worth listening to above 400Mhz
R

There's alot around 400-500 as steve terry said in his reply,
and around 800-1000 there's alot of analogue repeaters,
shortrange stereo wireless/headphone, and cordless phones

Also there are point-to-point links above 1000MHz, used between base
stations and hilltop radio sites. You can spot these on masts by the
horizontal plastic tubes pointing outwards, these contain a long Yagi.
The small elements for these wavelengths are more affected by wind &
rain, hence the protective tube.

AFAIK these carry plain FM voice if it's a single-channel link, multi-
channels using subcarriers also exist.

Actually, Most of these antennas you describe are Circularly Polarized,
Helix antennas, inside the RayDomes.