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Old 09-20-2017, 12:46 PM
Colly0410 Colly0410 is offline
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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that AFAIK digital TV is transmitted on VHF RF ch's 7 & 9 in Miami as I read it in TV listings site, he says it's old out of date info.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..
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Old 09-20-2017, 12:57 PM
tom.j.fla tom.j.fla is offline
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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
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Old 09-20-2017, 01:15 PM
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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
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Old 09-20-2017, 01:33 PM
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Quote:
Originally Posted by tom.j.fla View Post
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
Low band VHF DTV is still transmitted. There is a Channel 5 DTV carrier locally in Milwaukee and others elsewhere.
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Old 09-20-2017, 02:18 PM
tom.j.fla tom.j.fla is offline
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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
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Old 09-20-2017, 05:52 PM
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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 05:53 PM. Reason: capitalization
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Old 09-20-2017, 06:02 PM
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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.
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Old 09-20-2017, 07:13 PM
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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.
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Old 09-20-2017, 10:46 PM
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WESH channel 2 here in Orlando is transmitted on VHF. (Channel 11).
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Old 09-21-2017, 06:19 AM
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Quote:
Originally Posted by old_tv_nut View Post
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.
Everyone of my (pre-2014) flat screens has NTSC tuning and display capabilities. Samsung, one LG, and a TCL i got for the daughter. First thing i checked.

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?
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Old 09-21-2017, 01:23 PM
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Have one on Ch10 here which used too be on 8.
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Old 09-22-2017, 01:18 PM
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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 01:24 PM.
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Old 09-22-2017, 01:46 PM
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Whether America's TV stations eventually wind up on VHF or UHF won't matter to me anyway, as I don't bother with RF signals since connecting my flat screen to a Roku box last year. This player deals only with video streams, not RF. The only requirement is that users must have a cable account in order for the player to receive local TV channels. The picture on my set is now much better than anything I ever saw in analog, so to me paying $25 or so monthly for a cable connection, even though I don't use it, is well worth it. Spectrum, formerly Time Warner Cable, is converting all its systems to 100-percent digital on October 3, so it is a good thing I do have the Roku; as a Spectrum representative told me recently, those players will work in place of a cable box, but TVs connected directly to cable will not. The only way to get TV without a box of some kind is to use an antenna, as was commonplace in the late 1940s through the beginning of the DTV era.
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Old 09-22-2017, 08:35 PM
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Try as they might, they just can't quite completely kill off good ol NTSC, can they ?!? Kinda makes my ol' heart happy...
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Old 09-22-2017, 11:00 PM
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Quote:
Originally Posted by tom.j.fla View Post
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
I don't see how you come up with UHF is the best choice for digital tv...?
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....

.
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