The ARRL handbook list the gain of a discone as 2 dbi. The i stands for
isotropic force. Therefore the dbgain is 2 db over an imaginary force. The
discone antenna is an omni directional antenna and therefore really doesn't
have any gain. In order for a antenna to have a "true db gain" it has to be
directional. It's more or less a gimmick. If you stuck a wet noodle in your
antenna connector it would have a 2 dbi gain..


"Donald K" wrote in message
...

ARRL Antenna Book lists gain of a discone as 2 dBi.

I use a D-130J and 100' of 9913 (cuz I've been to lazy to trim it). I've
worked the digitpeater on the ISS with it.

When I get my X-50 up in a couple of weeks, I'll be looking for a
broadband, mast-mounted preamp for it, but that's just the engineer in
me.

The system has met and exceeded my expectations.

My experience leads me to believe that the reality isn't quite as bad as
Bill makes it out to be...

-Donald

Rikki wrote:

OH! el contrare mona me!

I know, rotten French ha ha..

even a rubber ducky has a gain. That is a gain over an "isotropic
force". Some manufactures of antennae rate the gain as gain over a
vertical dipole and some rate theirs over an isotropic force. The
higher gain antennas are probably rated as xx gain over an isotropic
force. Isotropic force is a imaginable antenna in free space and is
used for just this reason. Realistically, there is no gain on a non
directional antenna.



"Bill Crocker" wrote in message
...
A discone has no gain. Added to that, the loss factor of 75' of coax
(I don't care if it is 9913), and you will end up with a very
disappointing antenna system.

Bill Crocker

--
"One ought, every day at least, to hear a little song, read a good poem,
see a fine picture, and, if it were possible, to speak a few reasonable
words." - Johann Wolfgang von Goethe