[TowerTalk] CushCraft Query

Joe Subich, W4TV w4tv at subich.com
Thu Jun 22 10:33:23 EDT 2006


Download the A3, D4 and A743 (40/30 meter kit) manuals from the 
CushCraft web site and compare them.  You should be able to use 
the parts from the D4 as an A743.  The 10 and 20 meter traps are 
identical in the A3/A743 and the D4.  The 15 meter trap and the 
element lengths are slightly different.  To be "safe," I would 
recommend using the 15 meter trap from your A3 driven element  
the dimensions from the A743 manual.  

The D4 mast bracket is much more rugged than the DE mount for the 
A3 but you will need to replace the D4 U-bolts (2 1/8") with bolts 
to mount to the A3 boom (1 5/8").  I would recommend a pair of DX 
Engineering's 1 3/4" "Saddle Clamps" (www.dxengineering.com).   


   ... Joe, W4TV 

> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Barry Fox
> Sent: Wednesday, June 21, 2006 9:57 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] CushCraft Query
> I need the opinion of the yagi modeling gurus on the site.
> I bought a CC D4, 40 - 10M rotary dipole.  I have since decided to
> purchase an A3S.  I notice there is a modification kit to add 40M
> to the A3S driven element.  AHA says I, don't I already have that
> kit (more or less) with the D4?  Could I replace the DE on the A3S
> with the D4 and have a 40 - 10M yagi?  (with no gain on 40, I know).
> So I sent that query to CC and received a "I see no reason why that
> would not work" sort of reply.  I was really hoping to get a "We
> ran all sorts of software models of that configuration and really
> think that will work FB" sort of answer, but no such luck.  Does
> anyone on the list have any experience with a modeling program that
> would substantiate this idea?  Or shoot it down?  Either one is fine
> with me, I just want a better answer than the one I got from CC.
> TNX / 73,
> Barry - W1HFN

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