TD,

The RadioMaster P30 Antenna is only 15 foot (4 m) Long and has a 15
foot (4 m) FeedLine Coax Cable with a PL-239 Connector.

You have stated that you plan on placing this new antenna on the Roof.

Plus you also state that you have already built a 50 Ft Random Wire
Antenna that is mounted on your Fence, with a Balun and Coax FeedLine.


IMHO: You have the skills to build your own "On-the-Roof" Antenna.

Measure the "Space Available" 'on' or 'under' the Roof to mount this
new Antenna.
* Consider an "On-the-Roof" Antenna that goes from one corner of the
Roof (up and over the roof) to the diagonal corner. (Greatest Length)
* Use "Insulated" Wire and the 'wire' will lay directly on the
surface of the Roof.
* Cut and Build and Antenna to Fill the Space Available.
* Use a Balun / Matching Transformer and Coax Cable FeedLine


Ready-Made: Here are some commercial antennas that may fit your
needs.
* RF Systems MLBA-MK2 = 66 Foot (20 meters)
- - - http://www.rys.nl/Mlba2.jpg
* Par Electronics EF-SWL = 45 Feet of Flex-Weave Wire.
- - - http://www.eham.net/reviews/detail/3632
* eHAM Wire and Vertical Antenna Reviews
- - - http://www.eham.net/reviews/products/13


iane ~ RHF
..
..
= = = "Tim ODonnell"
= = = wrote in message ...
Dan,

If I had the space I would put up a really fine antenna. However I don't so
I will do the best that I can. The homeade longwire does pretty good, but I
would like to cut down a little noise and also try to get better reception
of some of the weaker stations. I often think that I am only listening to
the biggies, but sometimes I get lucky and pick up an obscure one.

When I read the loggings here in the group I often try them and find only
white noise. Sure I realize that location also means something but I feel I
can probably do better. That's why I am asking about the P30. It doesn't eat
up a lot of space.

By the way I think that I may have used one of your suggestions when I put
up the 50 foot wire. Because I don't have that much space I strung it on my
fence using tv antenna wire standoffs to keep it off the fence. I put a
decent balun on it and it works fine and it's not really that visible. I
just wish the fence was higher. If I get the P30 I will leave the old one up
and string the P30 along the roof.

Comments?
Tim


"Diverd4777" wrote in message
...
Hi Tim:
- How much space do you have?

Putting up 200 feet of antenna & center feeding it into the receiver
with a
grounded coax will help with weaker stations..

Dan


n article , "Tim ODonnell"
writes:


Is there anybody using the Radiomaster P30 aka (NASA P-30) shortwave
antenna? I am using a throw together 50 ft long wire and I am wondring
about
the performance of the P30. Any information from users would be greatly
appreciated. The long wire works fine I am just thinking of upgrading.

Thanks!

Tim