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Kei Clark's Avatar Kei Clark 03:33 PM 01-25-2012
I'm testing a new Omni-directional antenna. This particular manufacturer was making UHF ony antennas, but released this model to add VHF.

It is an outdoor antenna, but I'm on third floor so I just propped it up on my desk, and it tunes virtually ever channel....with the exception of ABC which is a VHF station. It has no problem picking up the other VHF stations, just ABC (Los Angeles) which is on Channel 7.

Any ideas? Is there something unique about VHF antennas that this model maybe lacking, or the signal from ABC?

ctdish's Avatar ctdish 04:22 PM 01-25-2012
It looks like you have other VHF channels KCAL, KTTV and KCOP. Do they come in? Indoor reception depends a lot on the construction of the building and may favor either VHF or UHF. An antenna that looks like rabbit ears is about as good as you can get on VHF indoors.
John
arxaw's Avatar arxaw 04:50 PM 01-25-2012
What is the model number? Or if you have a photo of it, please post.
Kei Clark's Avatar Kei Clark 07:14 PM 01-25-2012
Quote:
Originally Posted by ctdish View Post

It looks like you have other VHF channels KCAL, KTTV and KCOP. Do they come in? Indoor reception depends a lot on the construction of the building and may favor either VHF or UHF. An antenna that looks like rabbit ears is about as good as you can get on VHF indoors.
John

Well, I feel like a dope. I have an older UHF only outdoor anenna which I threw in my attic 8 years ago, before our stupid stations decided to move back HD to VHF (why would they do that?). So I never watched the VHF channels.

When I was testing, I plugged the wrong cable on my tuner. The VHF channels I got was on the UHF only antenna from Radio Shack in the attic. But because this is the first time it's actually tuned VHF channels (not that I bother to try before), I thought I had the new antenna connected.

So, maybe I'm starting to understand a little....if an antenna shows a range of 470-806MHz, do I assume that's strictly an UHF antenna? That would not explain how the Korean engineers were able to pick up VHF signals.....

Anyhow, here's the picture/info on the antenna:


Ken H's Avatar Ken H 07:25 PM 01-25-2012
From Wiki:

54-72 and 76-88 MHz TV channels 2 through 6 (VHF-Lo)
174-216 MHz television channels 7 - 13 (VHF-Hi)

470–512 MHz: TV channels 14–20 (also shared for land mobile 2-way radio use in some areas)
512–698 MHz: TV channels 21–51 (channel 37 used for radio astronomy)

698–806 MHz: Was auctioned in March 2008; bidders got full use after the transition to digital TV was completed on June 12, 2009 (formerly UHF TV channels 52–69)


So yes, you have a UHF only antenna. But even UHF only antennas will get some VHF channels (2-13), depending on the particulars.

Interesting they reference mobile use.
Kei Clark's Avatar Kei Clark 01:41 AM 01-26-2012
Quote:
Originally Posted by Ken H View Post

So yes, you have a UHF only antenna. But even UHF only antennas will get some VHF channels (2-13), depending on the particulars.

Interesting they reference mobile use.

Thanks Ken. I got similar information back from the manufacturer. Apparently, in Korea, they use VHF only for mobile TV (DMB) which they could tune with the said antenna. But for US TV, which is exclusive in using VHF for HDTV, they are not certain how it would work, but suggested it may not work if not installed outdoors.
arxaw's Avatar arxaw 05:03 AM 01-26-2012
The US (unfortunately) uses both VHF & UHF for TV broadcasts.
Ken H's Avatar Ken H 05:43 AM 01-26-2012
Quote:
Originally Posted by Kei Clark View Post

Thanks Ken. I got similar information back from the manufacturer. Apparently, in Korea, they use VHF only for mobile TV (DMB) which they could tune with the said antenna. But for US TV, which is exclusive in using VHF for HDTV, they are not certain how it would work, but suggested it may not work if not installed outdoors.

Even outdoors it would most likely be hit or miss for VHF stations.
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