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
> > >
> > >
> > >
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> >
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.503 / Virus Database: 269.16.14/1172 - Release Date:
>12/5/2007 8:41 AM
>
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG.
>Version: 7.5.503 / Virus Database: 269.16.14/1172 - Release Date: 12/5/2007
Dino - K6RIX
dino@k6rix.com
--
No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.503 / Virus Database: 269.16.14/1172 - Release Date: 12/5/2007
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|