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Ihave3days
27-Mar-2013, 4:21 AM
I have been building free DB4's for friends that do not have the fiscal means to pay for Cable TV for a couple years now. (I would cut the Cable TV cord myself, if the wife would let me haha).

I am building my 6th DB4 antenna, but this time it's for my Pops.

Since he is one of those "impossible to shop for" people, I thought a handmade DB4 would be the perfect gift for him, so he could still watch TV in case of a storm/emergency.

I started putting the antenna together tonight, & pulled his TVfool location... & that's where I got a little overwhelmed...

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3d1dda8328e8ddfc

I have NEVER seen such a crazy TVfool schematic, & to be honest, I don't even know where to start...

I have always had a set of towers in 1 direction that required a reflector screen, but these results make me think I should forgo the reflector, for omnidirectional capability.

So my questions are:

1. Would you use a reflector in this case?
2. What (Magnetic North) Degree would I even try to start pointing the thing?

teleview
27-Mar-2013, 5:49 AM
Having Tv stations in Multipul directions is the most common reception situation.

Having Tv stations in one direction is less common.

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The home built and manufactured bow tie type antennas are a UHF channels 14 thru 51 antenna design. That will receive to a lesser degree VHF high band channels 7 thru 13.

And not much at all of channels , 2 thru 6.

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The current Broadcast Tv Channels are.

VHF low band channels 2 thru 6.

VHF high band channels 7 thru 13.

UHF band channels 14 thru 51.

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The tvfool location has , Many , Strong Signal Strength , UHF channels and VHF high band channels.

The home built bow tie antenna should work OK.

Aim either side of the home built bow tie antenna , With Out the reflector screen at about 200 degree magnetic compass direction.

Here is how to aim antennas , http://www.kyes.com/antenna/pointing/pointing.html.

ADTech
27-Mar-2013, 12:16 PM
Nothing "crazy" about it - your location is between two major markets - DC and BMI. This is a very common situation, especially in the Northeast.

A bi-directional UHF/VHF antenna will likely work fine. A reflectorless 4-bay antenna with an additional VHF dipole will likely work fine. Orient it so it is perpendicular to an imaginary line that connects the DC and BMI broadcast towers.