[TowerTalk] MATV-Quality FM Broadcast Yagi

[Jim Idelson]

Hi Jim,

If you want to do this the brute force way, choose Option A. For the easy way, skip immediately to Option B!

Option A: I suggest you run some numbers to see if what you are trying to do is realistic. Are there any off-periods for the LP station? Put up an omni antenna and measure the difference in signal strengths of the two stations. This difference plus 2-3db is your target. In order to get acceptable reception of the remote station, you will need to use antenna patterns, and nulling strategies to get its strength just a few db better than the LP station. For many receivers, capture will occur with as little as a couple of db difference.

Option B: http://www.kcsm.org/fm_listen.html

Good luck!

Jim

[TowerTalk] MATV-Quality FM Broadcast Yagi
from [Jim Brown] [Permanent Link][Original] 
To:  "Tower Talk List" <towertalk at contesting.com> 
Subject:  [TowerTalk] MATV-Quality FM Broadcast Yagi 
From:  "Jim Brown" <jim at audiosystemsgroup.com> 
Date:  Mon, 05 Jun 2006 18:06:11 -0700 
List-post:  <mailto:towertalk at contesting.com> 
I have a tough reception condition at my new QTH -- a LPFM is 1.5 
miles away and on the same channel as San Francisco's great jazz 
station (KCSM). Luckily they are about 160 degrees away in azimuth, 
so I may have a chance if it throw a serious antenna at it (and maybe 
even a cancelling antenna to null the LPFM. I'm having a hard time 
finding good choices though -- the two best bets seem to be a 10 
element Winegard and a 13-element model (12 ft boom) from Antenna 
Performance Specialties. Both cover the entire FM band, but I care 
only about the bottom 4 MHz, so I'd gladly buy a narrow band antenna 
that is tweaked for a bit more gain and F/B. And F/B is far more 
important than an extra few dB of gain. 
Any ideas?  Other options? Is there an MATV product that might be 
narrow band?  Has anyone used the APS product or know anything about 
them? 
Please email me off list, since this is a bit off topic. 
Thanks,
Jim Brown K9YC
 



Jim Idelson K1IR
email    k1ir at designet.com
web    http://www.k1ir.com