http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id=8d17cd664a0ccf
I'm not having any issues receiving every UHF signal from the top on down to KMOS TV. KMIZ is hit and miss with atmospheric conditions. I suppose if I set up my Channel Bastard 4251 parabolic I'd be able to get KMIZ most or all the time but I don't know whether or not I will be staying at my present location for more than another year to year and a half.
The problem child here is KQTV Ch. 7. A single YA 1713 didn't cut the mustard and so I stacked it with a second unit and coupled it into a CC7870. Pre amp is the CM 7777 Tighten. Height to the top antenna is about 32 feet. Phased cable and spaced antennas properly according to Winegard tech for Ch. 7. When installed last Fall I found this solved the problem for the weak signal. Gain on the TV's SSM was around 20db SNR with the stack vs. around 15 db to 16 db and near constant pixelating for a single antenna.
Fast forward to March 2011. Suddenly the signal strength has dropped down to an average of about 17 db SNR on the TV SSM and interference, presumably from a co channel or possibly a nearby FM station has occurred. The interference vanishes when the signal strength of Ch. 7 bounces back up to around 20 db or higher. But normally now the average signal strength is closer to 17 or lower and the interference kicks in and cripples the picture.
Unless I can get my hands on a now discontinued VHF deep fringe antenna or can find a way to make a YA 1713 or Y10-7-13 work, I am going to have to resort to either buying a very large combo antenna like a Antennacraft HBU 55, Winegard 7697p, Channel Bastard 3671 or Anntennacraft HD 1850 which would likely solve the problem due to the higher gain figures for Ch. 7 when compared to the YA 1713.
I found the following link and this concept interests me. http://www.antennahacks.com/Hacks/MyY10-7-13V.htm
I don't really have many tools to fabricate a metal antenna on its own but perhaps I can use a drill and a hacksaw that I have and come up with a modification of the Y10-7-13 that will give me the added gain and directionality needed to overcome the co channel or FM interference. Someone is sending me a FM filter and I plan to install that once it gets here but I do believe I will need more gain as well since I have seen a significant drop in just the last two to three weeks.
Since reading the head to head modeling and comparison of the Y10-7-13 and YA 1713 by "re nelson" and another test I found elsewhere on the web it is evident that the Antennacraft antenna has better gain on Ch. 7 than the Winegard antenna.
I would like some recommendations on what I can do to obtain a reliable signal on Ch. 7 and if that includes trying to hack a Y10-7-13 with a new segment with more directors then so be it. Suggestions are requested...
I'm not having any issues receiving every UHF signal from the top on down to KMOS TV. KMIZ is hit and miss with atmospheric conditions. I suppose if I set up my Channel Bastard 4251 parabolic I'd be able to get KMIZ most or all the time but I don't know whether or not I will be staying at my present location for more than another year to year and a half.
The problem child here is KQTV Ch. 7. A single YA 1713 didn't cut the mustard and so I stacked it with a second unit and coupled it into a CC7870. Pre amp is the CM 7777 Tighten. Height to the top antenna is about 32 feet. Phased cable and spaced antennas properly according to Winegard tech for Ch. 7. When installed last Fall I found this solved the problem for the weak signal. Gain on the TV's SSM was around 20db SNR with the stack vs. around 15 db to 16 db and near constant pixelating for a single antenna.
Fast forward to March 2011. Suddenly the signal strength has dropped down to an average of about 17 db SNR on the TV SSM and interference, presumably from a co channel or possibly a nearby FM station has occurred. The interference vanishes when the signal strength of Ch. 7 bounces back up to around 20 db or higher. But normally now the average signal strength is closer to 17 or lower and the interference kicks in and cripples the picture.
Unless I can get my hands on a now discontinued VHF deep fringe antenna or can find a way to make a YA 1713 or Y10-7-13 work, I am going to have to resort to either buying a very large combo antenna like a Antennacraft HBU 55, Winegard 7697p, Channel Bastard 3671 or Anntennacraft HD 1850 which would likely solve the problem due to the higher gain figures for Ch. 7 when compared to the YA 1713.
I found the following link and this concept interests me. http://www.antennahacks.com/Hacks/MyY10-7-13V.htm
I don't really have many tools to fabricate a metal antenna on its own but perhaps I can use a drill and a hacksaw that I have and come up with a modification of the Y10-7-13 that will give me the added gain and directionality needed to overcome the co channel or FM interference. Someone is sending me a FM filter and I plan to install that once it gets here but I do believe I will need more gain as well since I have seen a significant drop in just the last two to three weeks.
Since reading the head to head modeling and comparison of the Y10-7-13 and YA 1713 by "re nelson" and another test I found elsewhere on the web it is evident that the Antennacraft antenna has better gain on Ch. 7 than the Winegard antenna.
I would like some recommendations on what I can do to obtain a reliable signal on Ch. 7 and if that includes trying to hack a Y10-7-13 with a new segment with more directors then so be it. Suggestions are requested...