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Author Topic: Spiral effect of mounted antenna in small attic  (Read 21960 times)
MAKO36
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Posts: 6




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« on: October 07, 2012, 06:55:50 AM »

Well after trying to figure out which antenna to get without violating HOA rules and definitely ruling out indoor loops(AOR) I think I may have found a way to hang my PAR wire after being told to remove it. I have an attic that is located on my garage....dimensions are roughly 6 feet wide...5 feet in height...and about 15 feet in length. I'll place the box(transformer where my coax goes to) at the floor of the attic and place my wire going up in a spiraling effect along the wall. Not many electrical appliances in the garage to give me interference and shielded from the outside environment as well. We shall see...
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MAKO36
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Posts: 6




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« Reply #1 on: October 07, 2012, 08:35:46 PM »

Haven't gotten to it yet...you think putting it up in a spiral would be bad? This is the best I can do
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K0OD
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Posts: 2578




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« Reply #2 on: October 12, 2012, 07:34:25 PM »

  
Quote
"you think putting it up in a spiral would be bad?"

Not at all. What bands are you planning to listen to? Should work decently below about 10 to 15 MHz. The test is whether the atmospheric noise level changes when you attach and detach that antenna. If band noise rises with the antenna, it's probably good enough, at least on that frequency.  

You'd probably hear somewhat better, especially on quiet higher frequency bands,  running a much longer wire up to a stout tree.  Use very thin black wire so that it's invisible to the HOA. You can even spiral the wire around the tree. Be prepared for it to break after wind or snow-loading.
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K7KBN
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Posts: 2825




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« Reply #3 on: October 27, 2012, 02:53:26 PM »

For an SWL antenna, you would be MUCH better off just experimenting with different antennas in the space you have readily available.  My very first SWL antenna was some #22 solid copper wire running diagonally across my bedroom ceiling, held up on the ends with thumbtacks and dropping straight down to the receiver.  How long was it?  Long enough to go diagonally .... You get the idea.

Experiment.  See what works.  Then try another variation and see if there is any difference.  For receive-only antennas you don't have to worry about SWR, and you certainly don't have to buy a preassembled, overpriced commercial kludge.
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73
Pat K7KBN
CWO4 USNR Ret.
N5RMS
Member

Posts: 37




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« Reply #4 on: November 09, 2012, 10:11:37 AM »

One of my first antennas was a Slinky.  It was resonant on 3 bands!!

Gud Luk
N5RMS
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