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 telescoping beams
One problem I have encountered from Hams living in apartments is the space
to place a VHF/UHF antenna. This concerns operation of the beam from a
edroom
or porch. In these cases,the Ham can not keep the antenna up and must remove
the antenna after he or she finishes.
Using telescoping elements can solve the problem.
Adding a two or more section boom can further the portablilty for the
ntenna
making it idea for field day,camping,or travel also.
Dimensions for beams have been discussed earlier,so I won't rehash them
re.
The best portable and quickest for set-up is the four element VHF antenna.
A two section quick-clamp boom with mounting flange for a camera tripod
provides the base. Each element contains two telescoping units and a snap on
fitting for attachment to the boom.
The driven element has shorter telescoping units to preserve the
gamma match section as one piece.
The antenna described here can be stored in a briefcase save for the camera
tripod. A VHF four element antenna can provide 9dBi of gain for the apartment
dweller.
-WS
--- GoldED 2.42.G1219
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* Origin: VE3SJN....Moderator....HAM_TECH (1:163/506.4)
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