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Re: [TowerTalk] shorty forty

To: ve6wz@shaw.ca
Subject: Re: [TowerTalk] shorty forty
From: k2qmf@juno.com
Date: Sat, 13 Nov 2004 11:04:19 -0500
List-post: <mailto:towertalk@contesting.com>
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.
> > 
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com 
> > http://lists.contesting.com/mailman/listinfo/t> owertalk
> > 
> 
> 
> _______________________________________________
> 
> 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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