I have a 40-2CD and it is useable from
7.000 to 7.250 also!! No need for a switch box...
73, Ted K2QMF
On Fri, 12 Nov 2004 18:30:00 -0700 Ve6wz_Steve <ve6wz@shaw.ca> writes:
> Doug:
>
> I found that my XM-240 when tuned for around 7.063 was useable from
> 7.000 to 7.250.
> I'm not sure you would really need a switch box.
> BTW...the bandwidth of this Yagi is so broad mostly because of the
> way
> it is tuned...the max. F/B is actually way below the design
> frequency.
> You can improve the F/B and increase the gain somewhat by making
> the
> reflector element a bit shorter. However, because this increases
> the
> mutual coupling, the feedpoint impedance goes down (you need to add
> a
> small hairpin match at the feedpoint) and the SWR bandwidth goes
> down.
>
> 73, de steve ve6wz
>
>
> > -----Original Message-----
> > From: towertalk-bounces@contesting.com
> > [mailto:towertalk-bounces@contesting.com] On Behalf Of Doug
> Renwick
> > Sent: Friday, November 12, 2004 8:02 AM
> > To: towertalk@contesting.com
> > Subject: Re: [TowerTalk] shorty forty
> >
> >
> > Has anyone successfully added a CW/SSB relay box to the
> > driven element of the Cushcraft XM240? And if so, how did you do
> it?
> >
> > Doug
> >
> > Keith Dutson wrote:
> > > I have two of the F12 antennas. Both have the relay box for
> CW/SSB
> > > switching. They were difficult to tune, but offer stellar
> > performance
> > > once tuned properly.
> > >
> > > Keith NM5G
> >
> > --
> > Doug Renwick VA5DX
> > PO Box 50, Clavet, Saskatchewan, Canada S0K 0Y0
> > VE5RA@sasktel.net First VE5 9BDXCC What profit it a ham if he
> > gains all the awards yet forfeits his soul? I'll run the race
> > and I will never be the same again.
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers",
> > "Wireless Weather Stations", and lot's more. Call Toll Free,
> > 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
> >
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> >
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
> "Wireless Weather Stations", and lot's more. Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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