Discone ,Was designed for the Military because in the battlefield they use many freqs for transmit and receive and sometimes the life the radio guy is short the bad guys want to kill them and stop Communications . The Discone is broad banded so no SWR Problem and unity gain . It is a great overall scanner ant and you can even use nice quad shielded RG-6 Cable at 75 Ohms for receive. Not all discones are made well some are cheap , If outside after a time exposed to the elements will fall apart Example the better ones use stainless parts

Now I will say this in over 45 yrs. I have never found any ant that was not tuned for the Freq it was going to operate on that anything else was better .Example the discone is broadband 25 to 1300 Mhz so if you have high power transmitters within the range you are not trying to use it for that also could be a problem of overloading your receiver ..

Stay Safe and Healthy

Don KA9QJG

From: Jim Walls [mailto:jim@k6ccc.org]
Sent: Sunday, October 17, 2021 7:46 PM
To: amsat-bb@amsat.org
Subject: [AMSAT-BB] Re: Question: Diamond D130J for Satellite Use?

On 10/17/2021 15:32, Richard AG5M via AMSAT-BB wrote:

Specially I asked about the M2 Egg Beater antenna system. No bad words about it, and I now know the M2 Leo Pack is "the" de-facto satellite antenna system.

I'll give you bad words. ANY omni antenna for satellite will be very marginal at best. I built a Egg Beater clone years for use as a packet downlink gateway station for one of the early packet satellites. In several years, if I got ONE packet to decode per day, it was doing well.

A Ham mentioned an antenna I never thought about, the Diamond D130J Discone. It would seem it too, especially given its low cost, is a viable choice for someone just getting their feet wet without spending a lot up front to get started. I have everything I need, other than the antenna.

Same general answer, I would think a discone would not work very well.

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Jim Walls - K6CCC

jim@k6ccc.org

Ofc:  818-548-4804

http://members.dslextreme.com/users/k6ccc/

AMSAT Member 32537 - WSWSS Member 395