I am using a modified 30 meter beam with parts from a 40-2CD.
Basically, the top hat rods (36" elements after the inductor) are
removed. Next, the spacing is reduced to 140". The boom could be
lengthened (with little performance increase) but I just used a
simple 12 foot boom. Then the overall length of the reflector is
reduced to 215" and the driven element to 212". I used a toroid balun
at the feed but a few turns of RG8 coax (similar to 40-2 CD) should
work fine. The VSWR is about 1.5:1 but that is no problem.
My 30 meter 2 element shortened beam works great and F/B is over 12
dB. I have had mine in operation for two years.
At 07:18 PM 3/27/2006, carlos colon wrote:
>I will like to know if there is any modification for Cushcraft 402CD
>to be used on 30 meter band? Thanks for help.
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