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Total 365 documents matching your query.

361. Re: [TowerTalk] Feedline (choke) question (score: 1)
Author: "Jim Lux" <jim@luxfamily.com>
Date: Mon, 29 Sep 2025 15:46:44 -0400
  I'd bet that in most cases, the outside of the shield (if not buried) is a lower impedance (unless it's just the right length) than anything in the soil, though. "This one bothers me. Remember that
/archives//html/Towertalk/2025-09/msg00114.html (10,812 bytes)

362. Feedline (choke) question (score: 1)
Author: "Jim Lux" <jim@luxfamily.com>
Date: Mon, 29 Sep 2025 15:56:46 -0400
  Well, some of it does reradiate from subsurface (hence sounders and other "radars"). And in things like a Beverage, the currents in the dielectric under the wire form an essential part of the anten
/archives//html/Towertalk/2025-09/msg00115.html (17,684 bytes)

363. Re: [TowerTalk] Feedline (choke) question (score: 1)
Author: "Jim Lux" <jim@luxfamily.com>
Date: Tue, 30 Sep 2025 10:12:08 -0400
  <big snip> The late Henry Ott taught in his EMC workshops that above a few kHz, the impedance of a conductor with even a very large cross sectional area is dominate by inductance. yes - the inducta
/archives//html/Towertalk/2025-09/msg00121.html (11,571 bytes)

364. Re: [TowerTalk] Feedline (choke) question (score: 1)
Author: "Jim Lux" <jim@luxfamily.com>
Date: Thu, 02 Oct 2025 14:28:38 -0400
The Starlink emissions are regular old spurious EMI from digital circuitry. Odd as it may seem, spacecraft have no requirements for unintended emissions.  That is, there's no Part 15 or CISPR type ru
/archives//html/Towertalk/2025-10/msg00028.html (15,820 bytes)

365. Re: [TowerTalk] Feedline (choke) question (score: 1)
Author: "Jim Lux" <jim@luxfamily.com>
Date: Fri, 03 Oct 2025 11:36:44 -0400
Youre talking about the round DIN connectors here (like used for MIDI), versus the RF DIN connectors? Yes, DIN and mini-DIN are way too delicate for stage use.. you want something you can step on or
/archives//html/Towertalk/2025-10/msg00034.html (13,413 bytes)

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