[TowerTalk] m2 40M4LLDD + 20m add on

[W2RU - Bud Hippisley]

Perhaps you misread my comment, John.  In the summer, the minimum SWR point of my 40M2LL is 7.050 MHz.  In the winter, minimum SWR may be down around 6.950, depending on the specifics of the ice and snow loading.  I still want to operate near 7.050....with specified forward gain and F/B ratio -- whether I use an amplifier or not.

Bud, W2RU

On Jul 10, 2013, at 9:30 45PM, john at kk9a.com wrote:

> Any efficient shortened 2el 40m beam will have over 2:1 SWR some place in 
> the band.  Thankfully there are amplifiers that load fine into higher SWR.
> 
> John KK9A
> 
> 
> To:Bob Gibson <w5rg at yahoo.com>
> Subject:Re: [TowerTalk] m2 40M4LLDD + 20m add on
> From:W2RU - Bud Hippisley <W2RU at frontiernet.net>
> Date:Wed, 10 Jul 2013 12:37:25 -0400
> List-post:<towertalk at contesting.com">mailto:towertalk at contesting.com>
> 
> I'm one of those guys up north.  Ice and/or wet snow on the linear loading 
> is a
> disaster; it will move the SWR at the "fair weather" minimum SWR point far
> enough in either direction to activate the Alpha 99 high-SWR shutdown 
> circuit
> and generally cause deterioration of various electrical parameters of the 
> beam.
> That said, I'm very, very pleased with the mechanical aspects of my 40M2LL
> (and by extension, the 40M3LL), so I'm hopeful the coils will be offered as 
> a
> retrofit to existing LL owners.
> 
> Bud, W2RU 
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk