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Article #19668

Indoor TV Antennas

#19668
From: Mark Starin KB1KJ DTN: 264-5596 ...
Date: Wed, 07 Sep 1988 12:44
51 lines
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I have a room with southern exposure through a window, and cinder
block construction all around.  I have the TV across the room from the
window (for convenience - I may move it later) and I get (for NY/NJ
folks) 5,7,9,11,13,31,41,47,58,68 all fairly well, 4 good if I set the
antenna right, and 2 just barely.  58 is NJN in New Brunswick.
Rutgers folks - I am in South Tower on the South side of the building.
 
Radio Shack lists in their new catalog an amp designed to be placed
between the existing TV antennas (which came with the TV) and the TV
inputs.  It claims to boost reception by 10db.  Has anybody used this?
What do you think?

>> Indoor antenna situations are compromises at best but I have 
>> heard of some success using either aluminum foil cut in the shape of 
>> a dipole or burglar alarm foil (available at RS) and mounted on a 
>> window. In fact, you could probably make a gain-type antenna, 
>> although it would be non-rotatable, with a minimum of components 
>> (see below).

     		     LAZY-H ANTENNA

     	     468/f		     468/f
     	------------------	-----------------
     			  \    /
     			   \  /
     			    \/	NOTE: I drew this antenna from
     			    /\	memory so I'll have to get back
       			   /  \ to you on the verical spacing.
     			  /|  |\
     	------------------ |  |	-----------------
     	     468/f	   |  |	     468/f
     			   |  |
     			   |  |
     			   o  o
     			300 ohm feed

As I recall, you move the tap up and down on the phasing line for 
the best match. I think gain is around 4 - 5 dB.

I'd try passive means of building up your gain before using 
electronic means.

Good luck and I'll send you the vertical spacing dimension tomorrow.

______________________________________________________________
Mark Starin KB1KJ		 	US NAVY RADIOMEN DO IT 	
Digital Equipment Corp.		 	WITH MORE FREQUENCY
Merrimack, NH			
(603)-884-5596			
DECWRL::"abe.dec.com!starin"	
______________________________________________________________	
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!husc6!cmcl2!nrl-cmf!ames!pasteur!ucbvax!decwrl!abe.dec.com!starin
From: starin@abe.dec.com (Mark Starin KB1KJ DTN: 264-5596 MK01-1/A10)
Newsgroups: sci.electronics
Subject: Indoor TV Antennas
Message-ID: <8809071244.AA12970@decwrl.dec.com>
Date: 7 Sep 88 12:44:49 GMT
Organization: Digital Equipment Corporation
Lines: 51