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1. [TowerTalk] Stub effectiveness (score: 1): Author: Tom Osborne <w7why@frontier.com>; Date: Tue, 06 May 2014 16:55:00 -0700; Hi All What determines the quality of a coax bandpass stub? I found about half a spool of RG-6 at the local Goodwill store here and it seems like it is pretty good coax. It has a triple shield - foil; /archives//html/Towertalk/2014-05/msg00108.html (6,757 bytes)
2. Re: [TowerTalk] Stub effectiveness (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 06 May 2014 19:38:21 -0700; See k9yc.com/Coax-Stubs.pdf First, a simple stub is not a bandpass filter, it is a NOTCH filter. Second, what makes a good stub is low resistance. The best material for HF stubs is an RG8 with a beef; /archives//html/Towertalk/2014-05/msg00110.html (8,361 bytes)
3. Re: [TowerTalk] Stub effectiveness (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Tue, 06 May 2014 19:42:14 -0700; If you want high performance, replace the coaxial stub with a coil and sufficiently rated capacitor. It will have much higher Q. A coaxial stub makes a low quality rugged filter. Rick N6Rk What deter; /archives//html/Towertalk/2014-05/msg00113.html (7,778 bytes)

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