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jb_ky said:
I don't see WKRC DT12 unless some tropo is going on. Same for WYMT DT12. The most commonly seen Cinci DT TV for me is WCPO DT22 and WLWT DT35. I am in extreme SW Lexington and my antenna is a low-end Radio Shack VHF/UHF model up about 50-55 feet atop my ham radio tower. There are only 4 elements on the VHF part of the antenna, but it does well for WHAS and WBNA out of Louisville.
The best thing to happen to WYMT was getting a VHF channel. People with satellite or no cable service could barely if at all pick them up on UHF. They had always wanted a VHF channel but so few were available and the cost and engineering would have delayed the sign on. The only channels seriously looked at were 4, 7, and 12 all analog. 4 and 12 had a host of problems that given time MIGHT have been worked out, more workable for 12 than 4 and not very promising at that. 7 was the best option and there were problems with it. Then owner Kentucky Central Broadcasting just wanted to get the thing on the air so it was decided to up the 57 power which was not a problem because there were no 57's around. Channel 8 was mentioned but was to close to Charleston WV, would have had to been directional which would have basically left out Pike County, financial suicide for a tv station due to the size of Pike County, this was before Knoxville got channel 8, that one still surprises me even to this day.
We had a tough time in Wolfe county getting WYMT on 57 When I lived there... Not the clearest picture ever. Haven't tried it since it's been on 12. Doesn't the VHF-12 Signal "bend" around the mountains? My parent's have a dish with no WYMT and they want WYMT.
7 would have been a great channel there back then. It works for WLJC-7 now. They have a big coverage area.
7 would have been a great channel there back then. It works for WLJC-7 now. They have a big coverage area.
If the FCC had had a brain in their head the analog TV world would have been different for the good. The FCC opened the UHF spectrum in 1952. They did not mandate that manufacturers build UHF tuners into their sets until 1964. Had they mandated that in 1952 we could have had VHF where it would have been the most useful and UHF where it would have done well. Nashville and Memphis could have been all UHF, Knoxville all VHF and Hazard probably could have been VHF from day one.jb_ky said:
The FCC band plan calls for allocating reclaimed broadcast spectrum in 5MHz blocks. The uplink band would start at channel 51 and expand downward toward channel 37 based on the amount of cleared spectrum. The plan calls for the downlink plan to begin at channel 36 and expand downwards.
http://broadcastengineering.com/legislation/fcc-unanimously-approves-incentive-auction-nprm
http://broadcastengineering.com/legislation/fcc-unanimously-approves-incentive-auction-nprm
jb_ky said:
Seemed to think WLEX and WTVQ used the same antenna.
The main reasons to think such are:
The FCC lists the heights:
WLEX:
Antenna Height Above Average Terrain: 286. meters HAAT
Antenna Height Above Mean Sea Level: 578.3 meters AMSL
Antenna Height Above Ground Level: 273.3 meters AGL
WTVQ:
Antenna Height Above Average Terrain: 284. meters HAAT
Antenna Height Above Mean Sea Level: 578.3 meters AMSL
Antenna Height Above Ground Level: 273.3 meters AGL
The antenna model is the same for both:
Antenna Make: DIE Antenna Model: TFU-30DSC-R 3S180DC
and, the directional patterns are the same (shown at FCC site).
Puzzled about the 2 meters difference in HAAT?
A WTVQ technical exhibit states that the number was corrected to 284 meters, maybe the WLEX version did not get the correction?
WTVQ doc shows a side mounted antenna for DTV, this would agree with the directional pattern.
A top mounted antenna is shown on the same tower drawing.
Looking at earlier FCC doc, shows a top mounted antenna was used for NTSC.
Maybe the top-mounted antenna is no longer in use?
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Digital TV (8VSB) seems to cause much less of adjacent channel interference that did NTSC. Here in Dallas there are a number of stations located adjacent channel.
If one adjacent channel has several dB more signal strength than another (not sure of the exact number, but more than 10dB difference) then the weaker channel can be disrupted in the receiver.
There are some FCC requirements that adjacent channel towers(serving the same area) be located near each other and to have some power output constraints relative to each other.
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