[TowerTalk] CC XM240 above a big Tribander

[W0MU Mike Fatchett]

I don't believe that there was any change to the swr curve or FB.

I believe that one of the Cushcraft Engineers said that grounding the 
Reflector was ok.  It might have been by someone who modeled it.

Mike W0MU

On 4/17/2014 9:04 AM, Wayne Kline wrote:
>  Interesting Mike ?
>
>   I replaced  my  Hi Gain  3 element with an XM240 and it's insulated 
> elements  gave me no top loading for my shunt feed tower ( only boom @ 
> DC ground)
> Question ..... Di the grounding have any effect on the  antennas Band  
> width  or  Front to back ?
>
> Wayne W3EA
>
>
>
>
> > Date: Thu, 17 Apr 2014 08:55:53 -0600
> > From: w0mu at w0mu.com
> > To: towertalk at contesting.com
> > Subject: Re: [TowerTalk] CC XM240 above a big Tribander
> >
> >
> >
> > When I was in Montana, I had an ungrounded XM240 and every time a storm
> > would brew up you could hear the sprarking between the element and the
> > boom in person and obviously on the radio. At night you could see it.
> >
> > I put a ground strap on my XM240 here in Colorado and I don't have that
> > problem. The XM240 should have minimal interaction. Mine is 10 - 12
> > feet above my SteppIR.
> >
> > Mike W0MU
> >
> > On 4/17/2014 6:26 AM, N2TK, Tony wrote:
> > > Wasn't there something said years ago about grounding the 
> reflector on the
> > > XM240 so it would work like the earlier 402CD? I can't remember if 
> this was
> > > intended to reduce the interaction on 15M or if you had the 
> antenna at right
> > > angles to a 20M beam the grounding would reduce a 20M resonance on the
> > > XM240?
> > > Lots of cobwebs in the belfry on this one.
> > >
> > > 73,
> > > N2TK, Tony
> > >
> > > -----Original Message-----
> > > From: TowerTalk [mailto:towertalk-bounces at contesting.com] On 
> Behalf Of Bill
> > > Parry
> > >