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Sushihunter
Antenna-Theory.com Newbie

Joined: 27 Jun 2011
Posts: 3

Sushihunter
Antenna-Theory.com Newbie

Joined: 27 Jun 2011
Posts: 3

 Posted: Fri Jul 01, 2011 11:56 pm    Post subject: *bump*
bigSteve
Antenna Wizard

Joined: 14 Mar 2009
Posts: 265

 Posted: Thu Jul 07, 2011 8:32 pm    Post subject: 1. Why would you want a loop antenna? The peak radiation direction for a loop is up (perpendicular to the plane of the loop). I think a simple dipole or yagi would be better. 2. For the wire that you use to make the antenna, it doesn't matter, although thicker is always better for bandwidth. 3. Not entirely clear on what you're doing here. 4. The balun is optional. You should try it both ways and see if it makes a difference. I don't think 72 ohms is the impedance of your loop antenna anyway. 5. 6. Why not just make a simple half-wave dipole?
Sushihunter
Antenna-Theory.com Newbie

Joined: 27 Jun 2011
Posts: 3

Posted: Fri Jul 08, 2011 4:00 am    Post subject:

 bigSteve wrote: 1. Why would you want a loop antenna? The peak radiation direction for a loop is up (perpendicular to the plane of the loop). I think a simple dipole or yagi would be better. 2. For the wire that you use to make the antenna, it doesn't matter, although thicker is always better for bandwidth. 3. Not entirely clear on what you're doing here. 4. The balun is optional. You should try it both ways and see if it makes a difference. I don't think 72 ohms is the impedance of your loop antenna anyway. 5. 6. Why not just make a simple half-wave dipole?

1- I had the wire at hand and could build this without having to spend any cash. It started out as a simple long wire antenna and developed into a loop.

2- OK, thanks.

3- I have a length of standard TV coax from the TV - one end is stripped and the long wire is attached to the center wire of the coax. It then runs to the roof, around the loop, and back inside where the other end connects to the shield of the coax completing the loop.

4- I have tried with and without the baulin - not sure if it makes much difference one way or the other. I believe that the baulin should convert the loop antenna to 72 ohm for the coax to the TV. Correct?

6- Problably would have made more sense, but the longwire seemed easier to build. I am now thinking of a tuned loop now that I have the frequency for the TV channel. approx. 180.000 MHz - If I can just find the formula that I used years ago to make one for my police scanner... I recall it being about 18" or there abouts.
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