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 Post subject: Active Loop Antenna
PostPosted: Mon Jul 10, 2017 2:27 pm 
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Joined: Thu Jun 26, 2014 11:55 pm
Posts: 47
I found a active loop antenna for receivers on ebay and the loop has a 950 ohm resister in the wire run that makes up the loop . I emailed the seller and asked what the 950 ohm resister was for , he didn't know , he was just selling them . Does anybody in this forum know why the 950 ohm is the loop ?????????
Here is a website with the antenna on it , but no reason why the resister is in the loop .


www.ra0sms.ru/p/rx-antenna-flag-fo0aaa-with-preamp.html


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 Post subject: Re: Active Loop Antenna
PostPosted: Tue Jul 11, 2017 11:35 am 
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Joined: Mon Nov 19, 2012 11:54 pm
Posts: 1193
I believe that's a termination resistor. Basically in a small loop antenna it helps create a directional radiation pattern, so the antenna receives better from one side.


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 Post subject: Re: Active Loop Antenna
PostPosted: Sun Aug 13, 2017 8:57 am 
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Joined: Sat Sep 13, 2014 10:13 pm
Posts: 14
I don't know this antenna but it is not a magnetic loop antenna. The magnetic loop antenna has very low impedance, could be around 1 ohm, so it need a specific preamplifier with low input impedance.


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