[TowerTalk] 5 Band Yagi with more than 2 elements per band

[Jim Thomson]

Date: Wed, 25 Jul 2018 14:59:30 -0400
From: rlvz at aol.com
To: towertalk at contesting.com
Subject: [TowerTalk] 5 Band Yagi with more than 2 elements per band

<But don't the JK antennas use muffler type clamps for attaching the elements to the boom where the elements must be lined up by sight?? I hate fooling around aligning elements by sight only to have them change when you tighten the clamp.??Pre-<drilled element brackets are much nicer and my idea of a well designed antenna.

<73,
<Dick- K9OM

##  Nope,  JK uses massive machined aluminum   2 piece wide clamps, with loads of surface area.  Muffler style clamps are history these days, good riddance... they have virtually  zero surface area. 
But I know what you mean by the oem F12   boom to ele brackets,  saves a bunch of time.   Flip side is... IF the yagi is needed to be re-tweaked, and ele spacing adjusted,   it’s a gong show with the F12  style brackets..esp aligning them.
There is zero room for error.  They must be drilled  precisely. 


##  For a real horror  show, the hy gain cast,  clamshell style..  boom to ele clamps, I found, were a bitch to align properly.    One could spend a long time aligning  a TH-11.   IMO, the worst  designed boom to ele clamps  bar none. 

##  On a side note,  I sent a note off just now to  Ken  at  JK ants..to  clarify what the status is on his improved version of the 5BA.... which does have plenty of room to  side mount to a tower....and use  no metric al tubing. Metric tubing as used on the optibeam yagis, is not easy to source, near unobtainium. 

Jim  VE7RF