|
#1
|
|||
|
|||
VHF digital TV?
Having a discussion with an american friend who says VHF TV is not transmitted anywhere in USA anymore. I explained that AFAIK digital TV is transmitted on VHF RF ch's 7 & 9 in Miami as I read it in TV listings site, he says it's old out of date info. Can anyone please tell me if VHF is still used anywhere in the USA..
|
#2
|
|||
|
|||
What you read is correct. It is low band VHF that is not used. UHF is prefered but is not always available. With the repacking of the UHF band there will be more broadcasters on high band VHF. All the best, Tom.J
|
#3
|
||||
|
||||
The FCC site lists hundreds of VHF stations as on the air in the US:
https://transition.fcc.gov/fcc-bin/t...2=&EW=W&size=9 But note that many of the stations are listed multiple times. jr |
#4
|
||||
|
||||
Low band VHF DTV is still transmitted. There is a Channel 5 DTV carrier locally in Milwaukee and others elsewhere.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#5
|
|||
|
|||
Tom.C I stand corrected. I'm going by what happened here in Fla land. There maybe 1 or 2,3 still on low band. Local PBS outlet on ch. 3 with the max 30kw allowed was only getting out about 15 miles with a good signal. went to RF ch.13 and is covering there area. But UHF is the best choice for the digital format tv. Same thing happened with cell phones when they went all digital, went to 1.9ghz and higher. All the best, Tom.J
|
Audiokarma |
#6
|
||||
|
||||
Wbra
Blue Ridge Public TV in Roanoke,VA is on Channel 3 ; VHF ,
Virtual channel 15 (There old analog channel). Last edited by WA3WLJ; 09-20-2017 at 04:53 PM. Reason: capitalization |
#7
|
||||
|
||||
Aren't one or two VHF band stations in each market the "lighthouse" stations they maintained for civil defense/emergency communications use by analog TV? I'm talking ATSC 1.0 transition here.
One of our stations still has their analog NTSC/MTS transmitter. They transmit from the exciter (not final) into a dummy load for testing, but it's ready 24/7 to go back on the air should it be needed.
__________________
Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#8
|
||||
|
||||
Quote:
or that 30KW on ch 3 only goes 15 miles....? I'm in NY, 60 miles from NYC, Our CBS Analog was on 2. We got them here on an 30 year old RS $21. Color Special in the closet like they were direct wired. Don't know what they transmitted at back then. The higher the Fo. the worse reception got. Noise was bad too. Now digital, we have ABC on 7, they use 7KW and make it 60 miles. Others on ch 38, 48, etc. are up in the 200+KW and we don't get them here. VHF low goes farther with less power. Is less susceptible to noise, especially with this distance. Now I have to use a roof antenna on 20' extension, and a pre amp, + dist. amp. I have a spectrum analyzer too, with noise traps. I think VHF is much better for TV, Hoping repack brings back lower frequencies.... .
__________________
Yes you can call me "Squirrel boy" |
#9
|
|||
|
|||
We have KJWP channel 2 from Philly... craps out as soon as the sun sets... may or may not come back. Our antenna is the biggest whopper you can get up 60 feet from street level... thinking of stacking to get this channel more reliably.
Jim |
#10
|
||||
|
||||
Quote:
http://rabbitears.info/contour.php?appid=1598839&map=Y |
Audiokarma |
#11
|
|||
|
|||
I thought about the state of TV today with its rubbish programming.Rating drop over the last 20 years .Less interest in TV probably set the authorities to pick away at it bandwidth for cell phone and other wireless use.They probably could test higher freqs in the spectrum at the time years ago if they wanted to.Maybe they did .I dont know.
|
#12
|
||||
|
||||
I don't know who would use an analog signal if it were fired up again. Certainly not the public, who, even if they have OTR reception, do not have the no-longer-on-air analog channels scanned into their lineup.
|
#13
|
||||
|
||||
Quote:
But yeah, would we even have grid power? Antennas capable? Would there even be people around smart enough or saavy enough to reprogram their TVs? ATSC 3.0 removes the requirement for the NTSC capability, but also some of the ATSC 1.0 stations we have now will go silent - http://www.tvtechnology.com/expertis...atsc-30/276660 The whole telecommunications industry telling us what to do with our spectrum - not exactly fair, is it?
__________________
Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#14
|
|||
|
|||
Have one on Ch10 here which used too be on 8.
|
#15
|
|||
|
|||
Probably not much later they will only have 15 channels for TV if they get away with it.Most or all current channels will have to piggyback with others if they want to stay on the air.It does not matter to me since I cant even receive the closes station which is only 15 miles away from me.I dont have a HD TV hook up here to cable.What ever the cable box is putting out through its comp video output is what I got.
Last edited by centralradio; 09-22-2017 at 12:24 PM. |
Audiokarma |
Thread Tools | |
Display Modes | |
|
|