[TowerTalk] Station interference Stubs

[ai2n at twcny.rr.com]

I have some Belden 8213 (RG-11, fairly low loss 75 ohm).  Could this coax be used for stubs in a 50 ohm system?

73, Redd - AI2N

---- Jim Brown <jim at audiosystemsgroup.com> wrote: 
> On 2/12/2013 12:22 PM, Mike Baker wrote:
> > Stubs can do a pretty good job but for 160M the line losses will
> > kill you.
> 
> NOT if you use the right coax. RG6 is a bad idea for this, but a decent 
> RG8 or RG213 with solid PE dielectric will kill the 2nd harmonic by 24 
> dB,  See specific recommendations, tuning instructions, and measured 
> data  in the Coax and Stubs Q&A, link posted a few hours ago.  I haven't 
> measured the attenuation of 160M by a shorted 160M stub on an 80M 
> system, but interpolating from other measurements, I'd guess about 25 dB.
> 
> The W3NQN filters are first rate.  I recently finished a survey of all 
> the contesting bandpass filters I could lay my hands on. Lots of 
> measured data and analysis, as well as reports from several major 
> contest clubs on reliability.
> 
> http://audiosystemsgroup.com/BandpassFilterSurvey.pdf
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