My home built indoor loop antenna for my R75

[racin06]

Yesterday, I constructed my first antenna. This antenna is a diamond shaped loop with the antenna element consisting of RG-58 Coax. I used just under 23 ft. of coax (double loop) for the antenna element and my feed line is about 8.5 ft. in length.

I am amazed as to the quietness of this antenna. Many times, I can hear loud and clear signals but nothing registers on the S-Meter. So far, my testing reveals the antenna performs extremely well from 1.8 - 13 Mhz. Not bad for $28 dollars in materials and about 1 hour of my time.

Just so you know, I don't keep the antenna in front of the fireplace. That would drive my wife crazy. :lol: During use, I place the antenna between my sofa and three large windows in my living room.

I construsted the antenna based upon the the instructions at http://www.greertech.com/hfloop/mymagloop.html

If you'll notice, I am also currently experimenting with a coax loop antenna constructed on a hula hoop (left side of the photograph on the floor leaning against cabinet.)

This antenna sure beats my previous 32 ft. wire antenna tacked onto my ceiling. Also, I'll have to admit that this antenna also blows away my $129.00 Miracle Whip Antenna. Oh well, we all live and learn. Needless to say, I am very pleased with my diamond shaped loop antenna.

 

[safetyobc]

Could I build a working antenna like this for the 155.0000 mhz range. If so, how much coax would I need in my diamond?

 

[N_Jay]

Could I build a working antenna like this for the 155.0000 mhz range. If so, how much coax would I need in my diamond?

There are easier ways to get an antenna with a negative gain (loss) of 12 to 24 dB at VHF and not worry about noise. :twisted:

This antenna is nothing special.
If the signal is strong you don't need much antenna.

 

[safetyobc]

please inform me.

As of now I have a "rabbit ear" antenna from a small tv that I use. I prop it in my gutter outside my bedroom window run some coax through. I am picking up "Air band" extremely well. VHF High is pretty good too. I hear a Polilce Agency about 30 miles away fairly clear. 800 band is good also but I live about 1/2 mile from the 800 tower.

 

[N_Jay]

please inform me.

As of now I have a "rabbit ear" antenna from a small tv that I use. I prop it in my gutter outside my bedroom window run some coax through. I am picking up "Air band" extremely well. VHF High is pretty good too. I hear a Polilce Agency about 30 miles away fairly clear. 800 band is good also but I live about 1/2 mile from the 800 tower.

Well if the rabbit ear is about 1.5 to 2 feet you have decent VHF antenna.

If the 800 MHz system is so close you don't need a very good antenna.

How well you recieve has to be looked at from a "System Perspective".

The system is comprised of the transmitted signal, the path, the recieve antenna, the transmission line, and the noise (other signals) received.

Addressing the results while not looking at the entire "system" makes for a very poor analysis.