- 1. [TowerTalk] tower resonances (score: 1)
- Author: "D.W. Fearn" <dwfearn@dwfearn.com>
- Date: Thu, 12 Feb 2009 21:44:50 -0500
- I do not have any experience with detuning amateur antennas, but I have done it for several AM broadcast stations. The way we determined if the tower was re-radiating (and affecting the pattern of th
- /archives//html/Towertalk/2009-02/msg00294.html (7,745 bytes)
- 2. Re: [TowerTalk] Balanced Feedline for Ground Mounted Vertical? (score: 1)
- Author: "D.W. Fearn" <dwfearn@dwfearn.com>
- Date: Mon, 25 May 2009 16:47:30 -0400
- I worked at WPEN in Philadelphia as an engineer in the 1960s while I was in high school. Their three-tower AM array was built in the 1930s and all towers were fed with 4-wire open-wire line. The feed
- /archives//html/Towertalk/2009-05/msg00471.html (7,638 bytes)
- 3. Re: [TowerTalk] Resonance is over rated (score: 1)
- Author: "D.W. Fearn" <dwfearn@dwfearn.com>
- Date: Fri, 07 Aug 2009 16:17:39 -0400
- Many AM broadcast towers are not resonant -- 5/8 wavelength is common. A few capacitors and inductors bring the tower to 50j0 for 50-ohm coax. No baluns are used. These antennas are fed with transmit
- /archives//html/Towertalk/2009-08/msg00114.html (7,644 bytes)
- 4. Re: [TowerTalk] NON-INSULLATION STRIKES AGAIN! RG174 ANOMALLY (score: 1)
- Author: "D.W. Fearn" <dwfearn@dwfearn.com>
- Date: Fri, 04 Sep 2009 20:40:08 -0400
- I was using RG-174 as a shielded lead in a product we build and experienced exactly the same problem as Larry describes. This was from a brand-new, very expensive roll of Belden RG-174. This was to t
- /archives//html/Towertalk/2009-09/msg00075.html (9,770 bytes)
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