I had looked at the same process (and coincidentally have started on a Moxon
by the way) and agree you are correct, the element constructions are
slightly different.
But did you confirm whether the loading coils are the same though? (the
coils are what I was referring to in my earlier comment about being the
"same").
Ron
On 12/6/07, Dino Darling <dino@k6rix.com> wrote:
>
> AA6PW and I just evaluated these two antennas and the element
> stepping is different. He has an original 40-2CD and we wanted to
> convert it to the W6NL Moxon based on the XM-240...
> http://www.kkn.net/dayton2007/w6nl_ant.pdf
>
> We would have to make corrections in the stepping to get the CD to
> work like the XM. They ARE different.
>
> At 06:55 AM 12/5/2007, Ron Chambers wrote:
>
> >Unless I am nuts I have an email from Cushcraft a few months back where I
> >quizzed them about that very thing and am 99% sure they said they were
> the
> >same.
> >Will look back.
> >
> >Ron
> >N5QQ
> >
> >
> >On 12/4/07, K4SAV <RadioIR@charter.net> wrote:
> > >
> > > I counted 66 turns on my XM240 coils. Maybe that's the reason I had a
>
> > > lot of trouble getting it to go low enough in frequency.
> > >
> > > I would expect to see some kind of difference, either element length
> or
> > > coil turns, between the XM240 and 40-2CD. That U shaped support
> channel
> > > used on the XM240 significantly increases the effective diameter of
> the
> > > element, for the length of the channel.
> > >
> > > Jerry, K4SAV
> > >
> > > Doug Renwick wrote:
> > >
> > > >Historically it would be best to replace the self taping SS screw and
> > > >replace it with a bolt. I drilled the hole through with a 5/32" bit,
> > > >and used a 6-32 x 1 1/4" SS bolt and filed the bolt flush to the
> surface
> > > >of the nut. I put a #6 SS flat washer on the coil and a star washer
> at
> > > >the nut.
> > > >
> > > >On my XM240 coils I counted 67 turns. Some have reported counting 68
> > > >turns. Does anyone know if there was a design change or was this a
> > > >difference between the 40-2CD and XM240?
> > > >
> > > >Doug
> > > >
> > > >
> > > >
> > >
> > >
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