"Helmut Wabnig" [email protected] --- -.dotat wrote in message
...
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.


// snip //

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

w.

The shield on his dual-bander coax may work. The downside is the likely
pickup of interference close to the SW rcvr, like from a computer, switching
PS, fluorescent lights, etc.

I just tried it, using a coax-to-banana-jack adapter. I used a clip-lead to
connect the red banana jack to the shield of my 6m j-pole, making the shield
the antenna. It's about thirty feet long and it worked tolerably well on
the SW bands that are active at the moment. I did some A/B comparisons by
switching between the "shield-antenna" and my 20m dipole. Some SW stations
were actually better on the "shield-antenna."

"Sal"
(KD6VKW)