Help please

Blasto65

Thread Starter
SatelliteGuys Family
Feb 8, 2009
39
0
Rocky mount, VA
I have two question #1 how long is to long for a run from antenna to tv cable run. And #2 is 20 deg separation between channels to much for a Large Directional Antenna. Thank you for any help.:confused:
 

harshness

SatelliteGuys Master
May 5, 2007
16,457
2,626
Salem, OR
1: How far you can go depends on how much signal you're getting and whether or not you use a pre-amp. If you're trying to hide the antenna way out in the South Fourty, you probably won't make it. If the run is less than 200', there shouldn't be a problem that a good pre-amp can't overcome.

2. It all depends on just how directional the antenna is. Some have pretty generous lobes.


Overly general questions are likely to be rewarded with overly general answers.
 

CowboyDren

SatelliteGuys Pro
Jul 18, 2005
990
1
64133
1: If the run is less than 200', there shouldn't be a problem that a good pre-amp can't overcome.
I was just wondering about this myself. Is there a thumb rule, like, 200' of RG6 typically costs 3dB?

. It all depends on just how directional the antenna is. Some have pretty generous lobes.
hehehe....he said "generous lobes." :D

What antenna would work for the 335 to 316 range of stations
Try this; go to TV Fool - Home, jump through the hoops, do "Save Image As" and then attach the PNG image file to this thread. Or leave us your zip code so that we can look at it.
 

Don_M

SatelliteGuys Guru
Apr 30, 2008
128
0
Aurora, CO
I was just wondering about this myself. Is there a thumb rule, like, 200' of RG6 typically costs 3dB?
Yes, there is; it could be as much as 11 dB at that length. Loss is directly proportional to both cable length and frequency. See the attached chart, which is from Ken Nist's fine antenna discussion in hdtvprimer.com.

hehehe....he said "generous lobes." :D
Nice pun, Beavis.
 

Attachments

Don_M

SatelliteGuys Guru
Apr 30, 2008
128
0
Aurora, CO
Hate to run you through this hassle, but... Could you please run a post-transition TVFool report and attach it to a follow-up post? Your attachment above contains current signal conditions, which could be rendered obsolete for some of the stations by the DTV transition (whenever that happens!). I'm especially interested in 7.1 CBS, 10.1 NBC and 13.1 ABC; each affiliate is currently transmitting DTV signals in the UHF band but, like many others across the country, one or more may be "moving back" to their original VHF channel assignments once analog transmitters go dark for good. There's no sense in giving advice for a situation that may no longer apply after (allegedly) June 12. TIA.
 

Tower Guy

SatelliteGuys Pro
Nov 1, 2005
684
63
Here is post-transition

The simple solution is an all channel antenna with a rotor. I'd opt for the Winegard HD-7082P.

The elegant solution is a low band VHF only for WBRA, a 7-69 only aimed at 36 degrees for channels 13 and 20, a UHF only aimed at 97 degrees for channel 24, a second UHF only aimed at 306 for 17, 18, 30, and 36, plus a high band VHF aimed at 37 degrees.

Possible selections are:

Channel 3: Y5-2-6
Channels 13, 20: HBU-22
Channel 24: DTV2BUHF
Channels at 306: 4221 with preamp or if no preamp, HD8800

To combine the stations, you'd need a HLSJ, two UVSJs, Jointennas for channel 20 and 24, and five F jumpers.

If you have multiple TV sets, a preamp on the 306 degree UHF antenna would be needed.
 

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