Thanks for the tips

Are any better than the others in cross frequency rejection? I want a high
gain antenna but nothing that would pull in too many high power operators
locally.

Sometimes there are pagers or text message providers who bleed onto two
meters, especially when a local ham transmits, seems to come in strong. Are
there any ways to reduce or eliminate the cross frequency intermodulation? I
like the idea of the 17 foot, no problem with height, height means gain,
gain sometimes means intermodulation.

The diamond X-510 has very good reviews,

Any ideas how to eliminate cross channel intermodulation with good antenna?
Or right antenna?

Thanks





"Channel Jumper" wrote in message
...

'Helmut Wabnig[_2_ Wrote:
;801459']On Wed, 6 Feb 2013 22:08:02 +0000, Channel Jumper
wrote:
-

'Tom[_8_ Wrote: -
;801430']Hi all

Now I need a recommendation for a 2m 70cm base antenna. This will go
right
at the top of a 50ft tower. My ringo 2m modification antenna didn't
pan
out
too well. I could get low SWR on some freq but I want a wider range of
work.
If that is possible. I also use it for 156 megs (Marine band).

I am looking at the utubes of dual band antennas for home, I like the
UVS-300.

Can anyone make a recommendation for the purchase of a dual band
antenna? I
would also like to use it as a SWL antenna as I listen a lot on all
bands.
This antenna will be verticle and right at the top of the tower. I am
hoping
to spend about 200 dollars.

Thanks for any comments,-

The antenna of choice is the Diamond X 510 fed with Belden 9913 or LMR
400

Ringo's are nothing more then a over glorified dummy load..

Second choice would be a Diamond V2000 if you also wanted to include 6
meters.....

On two meters FM - I have talked up to 1500 miles when the bands were
open with the Diamond V2000 and frequently talk 50 / 75 miles in the
mountains of western Pennsylvania - although my elevation helps a
little.

I am at 1400' amsl - 60 miles west of State College and 65 miles east
of
Pittsburgh and I can talk and listen - north, south, east and west
about 50 miles full quieting.-


Do not take the Diamond X510, take a shorter one.
The long antenna bends and swayes in the wind causing unnecessary
fading. The bending results in early failure.

You cannot SWL with a real duoband antenna, because it is frequency
selective and is dead on the SW bands.

w.

Ya - I didn't catch that one.
Longer wavelengths requires a larger antenna, hence you aren't going to
use a 2 meter antenna to listen to 80 or 160 meters - at least you
probably aren't going to work much DX - but the bottom line is - you
need more then one antenna to do everything...

MIght I suggest the Barker and Williamson BWD 90 folded dipole for the
HF bands. Problem is - it costs more then 200 dollars.

The Diamond X510 should not give you much problems with bending -
opposed to what Wabnig sez...

Technicially, you should never put a vertical antenna at the very top of
any tower. You should side mount it - which would eliminate any bending
or flexing. Putting it at the top of the tower - just turns it into a
good lightning rod.




--
Channel Jumper