[HCRA] hidden roof antenna

[gjcollins at cox.net]

Hi Tuc,

>From what you told us about your landlord, you have a tough one!  But, that 
said, even a dipole laying directly on the roof will pick up some signals, 
more than you might think actually.  There was a QST article a while back 
were the author made a two-element 20-m beam by laying the wire for the 
elements right over the peak of his roof.  For HF, I would use RG-58 for 
feedline or even TV twinlead.

Rusgrove and Hall published a thing about some neat antennas made from 
300-ohm twinlead.  They are standard folded-dipoles, center fed with 300-ohm 
line.  The neat part is that by placing the correct size capacitor across 
the feedline at the correct point, you get a good match to 50 ohms.  The 
300-ohm line is easy to work with, fairly hard to see, if you can find the 
light-colored stuff, and it's cheap (always a good thing :).  These antennas 
are single band and are intended for low power operation (less than 100 w). 
They are written up in the Handbook a few years back.  I'll find it for you 
if you're interested.

73,

George, KC1V


----- Original Message ----- 
From: "Tuc" <tuc1 at comcast.net>
To: <hcra at mailman.qth.net>
Sent: Tuesday, July 03, 2007 10:41 AM
Subject: [HCRA] hidden roof antenna


______________________________________________
-------Hampden County Radio Association-------
-----------e-mail list (reflector)-------------
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Hello all,
   I have decided to hit the masses with this question since I want to put 
the antenna up in the next 2 weeks or so.It will be used to listen only, 
untill I can cough up the cash a transciever.
   I live in an apartment with a flat roof and was thinking about puting a 
wire ant up there. It is 45 ft x 45 ft.
   Field day has really lit a fire under my butt.
Thanks in advance
Tuc
N1QFT
------Hampden County Radio Association-------
An ARRL Special Services Club celebrating 60 years
------------http://www.hcra.org------------
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