Comet CHA-250B now available if anyone is interested in checking it out. Very simple to set up.
Bill - K5GJQ On Fri, Apr 9, 2021 at 7:17 PM Jack C via BVARC <bvarc@bvarc.org> wrote: > Hey Bill: > > I have one of those Comet CHA=250B antennas also..... > > Right now it's on a 10' mast on the back of my house. I also have a off > center dipole on my wooden fence and it is quieter and hears better than > the Comet. > > Right now I'm feeding it with 8X coax. I can't go up 35' since it would > require guying that I don't have room for. > > My plan is... I am going to ground mount it and run radials (as many as I > can in my small back yard) and I purchased some LMR 400 UF from ABR to feed > it. Other factors involved in all of this, one of which is totally ripping > my communications room apart and moving PC and HAM equipment to different > places and rerouting coax though the attic. > > I did email Comet to verify the max wattage on digital and they said 75 > watts, the paperwork says 60 watts. They said that is the number one > failure for this antenna is too much wattage. > > I will set it up as described, if that doesn't work I'll shop for > something different. The powers that be say that radials are key to any > antenna and I'm about convinced of that. > > Friends are recommending Hustler antennas but they admit they are a pain > to tune. Zero Five antennas makes a multi band 10-40m that has radials > (sort of like the old CB verticals). It is non resonant so requires a > turner but got good reviews... we'll see. > > I'll keep you updated. > > > On 4/9/2021 4:49 PM, Bill Hornbeak via BVARC wrote: > > I sadly purchased the above antenna, hoping to be able to have a little > better reception/transmission than I currently have. My area is restricted, > with only a backyard (20'x50') available. There's a huge live oak situated > in the center and two feet from the fence which doesn't help with > deployment. Ground radials are not feasible. > The antenna as per spec provides a very low SWR across all bands without a > tuner. There are background noises from 160m to 20m at which point it goes > deaf and mute 17m to 6m. On the Monday night 10m net I can barely hear or > be heard by a HAM about 5 miles away. > So if any of you adventurous souls have a hankering to try something new > as soon as I've replaced it (very soon) it will be available to try out. > Just contact me. > > Notes: > 1. Recommended height is 35' and I have it at 20', manufacturer's email > (available) told me that even at 20' it should respond better. > 2. Same email from the manufacturer indicated it uses the coax shield and > recommended 50' to 100'. So I added length and found no changes. > 3. Decided to try 4 radials 12' to 15' long attached just below the coax > termination and stretched out (angled down), also resulted in no changes. > > Bill - K5GJQ > -- > vs: Habakkuk 3:17-18 > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing > listBVARC@bvarc.orghttp://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/ > -- vs: Habakkuk 3:17-18
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