[Elecraft] Attic Antenna Tradeoff?

[JimWMiller@aol.com]

In a message dated 9/21/2002 2:04:38 PM Eastern Daylight Time, 
whiteleto@myvine.com writes:


> 
> I am currently building a new home and have many challenges regarding the
> use of a traditional outside antenna.  I know that an "indoor/attic" 
> antenna
> is a compromise, but how much of one??  All things being equal, what amount
> of attenuation (receive and transmit)can I realistically expect?  I am just
> trying to figure out if I would be happy with an attic antenna for the time
> being.  I will use a trap dipole in the attic (about 25-30 feet) with my 
> K2.
> Thanks!
> Greg, N9EYO
> 
> 
Greg,

I've used a commercial parallel dipoles in the attic for years and was 
reasonable happy.  Recently I've set up an outdoor w9inn dipole with loading 
coils.  To make a long story short, on 80 meters the outdoor was much better 
but on 40 and above the indoor was almost as good.  Some actual results from 
a comparison of the two antennas follows:
         band        indoor      outdoor
         80m         S9            20 over 9
         40m         S7            S8
         20m         S4            S5
        
A good 40 meter antenna in the attic is *almost* as good as an outdoor. Keep 
the power levels down to 20 watts or less for an indoor antenna!
GL & 73,
Jim WA2UMP K2:2679



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