![]() |
6 meter discone modification
I was reading an earlier thread about the Radio Shack Discone antenna
and saw a post from Wayne about using a ham stick to replace the top whip. I am wondering, since I have a couple of discone antennas and an extra old CB whip, if I trim the whip down, what would be the best length to cut the whip for optimum 6 meter transmitting on 52.525? There's no point in cutting it for the lower ssb portion of the band, since that's all horizontally polarized traffic. And since I have two discones, I am not worried about any effect it may have on frequencies beyond 6 meters. I don't have a ham stick, and since I have a nice long whip I no longer use, that seems like the best thing for me to use. I'm just unsure of what effect the rest of the discone will have on the vertical element, if any, and what length to cut the whip. I was experimenting with the antenna, switching the longer rods on the upper horizontal section of the antenna and the shorter rods for the lower ground plane to see what sort of reception I would get, but couldn't put it outside due to concerns the elements might break. I have had trouble with that in the past and had to order new elements. The antenna is definitely flimsy when it comes to construction, but I haven't had any antenna outperform it for reception over a wide range of freqs. As far as performance, it wasn't much different, though it was slightly better on lower frequencies and not quite as good above 2 meters. And since the antenna would never survive a wind storm set up like that, there's no way I would put it up on the roof in that configuration. It is disappointing that they chose to make it so cheap, but knowing Radio Shack, they probably did it so no one would get the idea of making such changes and eliminate sales of their other antennas. JJ wz0zzz seeds-and-weeds.com |
6 meter discone modification
In article .com,
"wz0zzz" wrote: .... JJ wz0zzz seeds-and-weeds.com Some years ago I did a study on skeletal disc-cones, I know it got published in the Central States VHF (20 years?). I will see if I still have a copy -- -------------------------------------------------------- Personal e-mail is the n7bsn but at amsat.org This posting address is a spam-trap and seldom read RV and Camping FAQ can be found at http://www.ralphandellen.us/rv |
6 meter discone modification
"wz0zzz" wrote in message oups.com... I was reading an earlier thread about the Radio Shack Discone antenna and saw a post from Wayne about using a ham stick to replace the top whip. The resulting antenna is nothing more than a 1/4 wave groundplane on 6M- and has none of the wideband characteristics of a discone at 6M. Dale W4OP |
All times are GMT +1. The time now is 09:12 AM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com