Original article from: Wayne Sarosi
Reposted by Rob Dennis,Moderator HAM_TECH,for use of the FIDO HAM_TECH echo.
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SUBJECT: Indoor antennas
Items to be covered: HF indoor antennas,VHF/UHF indoor antennas
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HF Indoor Antennas:
This can be fun. Imagine packing a 20m beam into an apartment! OW!
Imagine your XYL's reaction! OW! Imagine trying to turn it! LOOK OUT!
Here,I'll discuss some pratical indoor antennas that can be built by anyone.
Antennas include:
o HF foil antennas
o VHF/UHF discones
o Wire beams
o Attic VHF/UHF rotatables
o Tape antennas (TNX Jim,for the idea)
o Telescoping VHF/UHF indoor beams.
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HF Foil Antennas
HF foil antennas are too weak in their physical construction for outside
se.
Foil antennas are just what the title implies,foil.
They're made from ordinary aluminum foil,the kind used for heavy duty
ooking
such as roasting a turkey.
This antenna goes in the attic of your home or condo. Apartment dwellers may
have a time with this antenna depending on their location within their
complex.
Materials needed are two to three rolls of aluminum foil,copper tape with
electrically conductive glue,a staple gun and staples,and coax with
onnector.
By stapling the foil in a loop or dipole configuration on the attic rafters,
a simple antenna can be formed.
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|| balun if desired
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| coax to shack
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|| Balun if desired
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| coax to shack
These two configurations are excellent when used with a tuner for the
arious
bands on amateur radio and SWL listening. They are cheap to install and can
e
made into other configurations,by the amateur,if desired.
A relay can be installed to provide dual antenna configurations if needed.
With this device you can switch between a dipole and the loop for different
propagation conditions. Size and shape is dependent on the attic structure.
-WS
--- GoldED 2.42.G1219
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* Origin: VE3SJN....Moderator....HAM_TECH (1:163/506.4)
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