[TowerTalk] Fw: Screwdriver on moterhome

[Jim Miller]

Where is it mounted?  Is the whip (and coil, preferably) completely above
the roof when mounted?

Is the base of the antenna grounded?  It should be grounded to more than the
ladder or the bumper (too low to prevent strong RF reflection back to the
antenna from the body or metal inside).  It should be tied solidly to the
motor home chassis, ladder, roof rack, and if it is an aluminum body, tie it
to the body, great reflector.  I used a Butternut mounted near the top of
the ladder and tied to the roof rack and the aluminum body and it worked
GREAT.  Think grounding, not radials.

Just my thoughts,
73, Jim

> ----- Original Message ----- 
> From: "Don Josephs" <djosephs at beecreek.net>
> To: <towertalk at contesting.com>
> Cc: "A" <djosephs at beecreek.net>
> Sent: Monday, June 20, 2005 10:53 AM
> Subject: [TowerTalk] Radial Length
>
>
> > Folks  de  K5DEJ
> >
> > Is there a formula for determining the radial length, i.e. other than
> 468/f
> > MHz ???   I am trying to get a High Sierra 1800 Pro to resonate on my
> Motor
> > Home and have not been successful, as of this writing.
> >
> > I have searched the books I have here in the shack on the subject of
> radial
> > length but have not found anything other than the radial length should
be
> > approximately a quarter wave length.  I have cut the radials I have used
> to
> > the lengths specified by the above formula but have  not been successful
> in
> > getting the 1800 Pro to resonate.
> >
> > I would like the antenna to cover the frequencies of 4.025 MHz (MARS),
and
> > 40, 20, 17, 15, 12, 10 Meter Bands with a low SWR.  The 1800 Pro is
> mounted
> > on the back of a 28 foot Class C Motor Home.  Radials will have to be
> routed
> > to use the available space on top of the motor home.
> >
> >
> > Any assistance would be greatly appreciated.
> >
> >
> >  Peace and all good
> >     Don   K5DEJ
> >     djosephs at beecreek.net
> >       "Old radio nuts never die,
> >       they just fade into the noise!"
> >       K5DEJ
> >
> >
> >
> > _______________________________________________
> >
> > 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 at contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>