[TowerTalk] KLM 6L20 improved dimensions

[W0UN -- John Brosnahan]

Improved KLM 6L20 dimensions.  Better gain,
F/B and especially VSWR bandwidth.

I have not yet found the YO model information
but here are the actual dimensions that I used
on my two 6L20M KLMs, but I will continue
working on it.  Probably on one of the 18 computers
that are here but not set up.

I was very pleased with the improvement and
the measured SWR tracked the predicted SWR
perfectly.

I'll try to dig out the models I used, but in the mean
time these dimensions can be worked backwards for
a model or they can be used with confidence to assemble
an antenna that they will work very well.

		spacing	inches		

R-DE1		81-7/16 		
DE1-DE2	84-3/16
DE2-D1	90-5/8
D1-D2		224-7/8
D20D3	208-3/16

this will leave 3 inches of boom at each end.


		1/2" tip lengths inches

R		81-3/16	
DE1		56-3/4
DE2		36-5/16
D1		55-5/8
D2		55-1/4
D3		48-3/16

Exposed 3/4 inch tubing are all 69-5/8 inches.
Exposed 1 inch tubing are all nominal 72 inches.

I mounted the boom in the exact center to equalize the
torque load and then used steel weights to balance the boom.

73--John  W0UN