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: LPA series part 7
 BOOM SPACERS:
 These items are most important and they must cut in such a fashion as to
reflect the log-periodic nature of the element design function.
 In all the LPAs I have mentioned, each has two booms.
 These booms must be separate both electrically and physically in the 
tandard
LPA configuration. This means that the spacers must be non-conductive such as
plexi-glass, hard rubber, wood, plastic, PVC, etc.
 Spacers can be attached to the booms in many ways such as the use of nylon
screws and nuts, hose clamps, cable ties, etc.
 Currently I am using the PVC method which provides ease of parts and cost.
NOTE: Be advised that at frequencies over 1 GHz,PVC will become increasingly
 conductive.
 PVC can be cut to length and the log-periodic spacing can be accomplished
with ease.
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 MATCHING:
 There is no required matching for the LPA.
 Coax can be directly attached to the LPA. Normally the coax is run in the
lower boom from the rear of the LPA or attached to the lower boom.
 The shield is attached to the lower boom and the inner conductor attached to
the upper boom. This attachment is done at the front of the antenna and not
the rear as most believe.
-WS
--- GoldED 2.42.G1219
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