[TowerTalk] 30m Beam

[Mike Fatchett W0MU]

I did a bit of modeling with AutoEZ and came up with a Driven Director 
combo  SWR 1.5 6.5db gain and 10db F/B.  11.5 ft boom. This is removing 
the coil and x hat and using .875/.75/.675 tubing

Director 275.917 per side

Driven 295.335 per side

I have had 40-2CD's and XM 240' and never had any issues with the 
elements in Montana or Colorado.  We rarely get icing.  I did have an 
overhead break once.  I thought they double walled the elements at the 
center at least the Reflector?

I think I could get a bit better performance with a reflector but opted 
for shorter elements overall.  I may go back and play with the reflector 
version.  I don't think it is worth the extra .X gain

W0MU


On 5/2/2024 10:36 AM, Wilson Lamb via TowerTalk wrote:
> I wish I had time to play with the model and the numbers, but I don't.
> Of course that won't stop my sounding off.
> How about just jumping the coils with some 6ga wire?
> Then there's no mechanical work to do, if the cap hats will bring it to 30m.
> Wilson
> W4boh
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