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Oklahoma: Gray-Hoverman questions

3597 Views 24 Replies 4 Participants Last post by  hkaye
First I want to say... You guys rock! I'm not electronics geeky, so a lot of it make my head hurt, but I just think it's so cool you're using data to make design decisions.

The TV towers I'm shooting for are all less than 25 miles from me and all are clustered together. It's pretty flat here in Oklahoma and no tall buildings or hills between me and the towers, typically just single story houses and trees, so I won't need something beefy. Antennaweb says I need a small multidirectional antenna. So what I'd like to do is use the element design for the Gray-hoverman and make something seriously simple and cheap for inside use. Either that or the biquad or the stealth Hawk design. It would be mounted about 8 foot up on a wall on the tower side of the house with that wall and a garage door between it and the outside.

If I used good quality speaker wire (copper I think) and taped it to something flat (preferably plastic) in the correct configuration for the antenna:
1) Can I make the dimensions smaller while maintaining the aspect ratio without serious degradation of performance?
2) Will the unstripped speaker wire seriously degrade its performance?
3) Would a reflector help significantly with performance?

There are 8 UHF and 3 VHF (13.1, 9.1 & 5.1) channels, so I'd like to be able to pick up both UHF and VHF channels.

Which design should work better?

Thanks,
Betty
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1) Can I make the dimensions smaller while maintaining the aspect ratio without serious degradation of performance?
No. At minimum, youll lose the low channels.

2) Will the unstripped speaker wire seriously degrade its performance?
It will hurt. The covering changes the velocity factor of the wire and speaker wire is very hard to keep straight, which will degrade performance. Stripped solid house wire is a much better cheap choice.

3) Would a reflector help significantly with performance?
Yes, but it doesnt look like you really need it.

There are 8 UHF and 3 VHF (13.1, 9.1 & 5.1) channels, so I'd like to be able to pick up both UHF and VHF channels.
A reflectorless SBGH with NARODs would work well for you with minimum space. Your VHF stations are so strong, you may be able to receive those even without the NARODs.
If I did that I'd use a screw and washer to hook the balun to the elements right?
Yep. But see below.

one with the screws for wires and one with the little Y connectors. When using the stripped house wire, what's the best way to connect the balun to the antenna element if I don't do a wood or pvc base?
Small bolt, nut, washers is easiest.
One end of the balun should have twin lead you can split to reach the 3" feedpoint.
If I do end up having to climb up in the attic (ick), can I run the cable down into my existing cable distribution center in the closet?
I dont know, can you ? heh. If you havent already bought a distribution amp, I would get a quality preamp instead and use a splitter.
I'm really hacked at our local cable company. I was paying $80 a month and the only way to cut that down was to remove groups of channels. So that's left me with 24 channels that cost around $40 a month. given I can get quite a few of those OTA (at higher quality), I see no reason to pay them anything.
Absolutely, theyre insane.
especially since I can buy a Roku box to get netflix for less than $10 a month to fill in the movie aspect and also get pandora.
Yep, and you can rent DVDs for $1 that are way newer than on cable. And with a decent high speed internet connection, you have Hulu.com, Crackle.com, PBS.org, Natgeo.com, TheWB.com, CBS.com, Fox.com and many many more places to watch full length movies and shows with less commercial interruption. And the best part is, you choose the time to view.
So what's the best way to deal with no longer having a scrollable cable company tv show times/list?
If your receiver doesnt have EPG, then use the web at sites like zaptoit.com or TVGuide.com.

I'm also getting 8 stations not on the list that have #.2 or higher in the channel number. Those are digital right? What's up with that?
Yep. With digital, a single station can have many sub-channels. In one case in California, there is a station with 15 subchannels.
It's not picking up ION tv and that's one I want darnit. NM(db)=45.3 and it's in the right direction. Do you think rescanning the channels again would help? I'm going to have to rescan each time I dink around with how the antenna is aimed?
You probably should get NM(db)=45.3. Rescan. A full rescan isnt necessary if your TV receiver has an add channels function.
Do you think it would be worth it to break down and get the house wire? or figure out a way to mount the elements on something and use foil on the foam as a reflector? I really don't want to do either, but if you think it will help significantly I will. lol
Post pictures of what you have now.
Right now I'm using zap2it.com
Yep, I like the format of zap2it.com better than any EPG anyway.
What kinda loss do you get by lengthening the cabling?
With RG-6, figure 1db every 18 ft. With the older RG59, the loss is a bit more.
Any ideas on dealing with the audio quality when cabling the TV to my audio receiver?
Youll have to study your TV manual for the audio outputs it has and study the audio receiver manual for the inputs it has.
You mean hooking it up with the SBGH ? No, thats not a good idea, unless using an A-B switch to switch between the two antennas.
But it works!
Yeah, it looks like the dimensions are half way correct, so it should work. :p
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