- 1. [TowerTalk] t type antenna (score: 1)
- Author: w5jmw@towerfarm.net
- Date: Mon, 19 Dec 2022 02:57:37 -0600
- Hello all.I have a t antenna.50ft vertical and roughly 300 ft ntip to tip horizontal.I get a nice drop and resonance at abt 3.8 mhz.Is this weird resonant point normal??I would think it would be lowe
- /archives//html/Towertalk/2022-12/msg00116.html (7,144 bytes)
- 2. Re: [TowerTalk] t type antenna (score: 1)
- Author: Artek Manuals <Manuals@ArtekManuals.com>
- Date: Mon, 19 Dec 2022 04:27:37 -0500
- John We are missing a critical piece of the antenna "system"description. What is your ground system. Radials on the ground & how many, how long . Or elevated radials or no radials just a piece of pi
- /archives//html/Towertalk/2022-12/msg00117.html (7,765 bytes)
- 3. Re: [TowerTalk] t type antenna (score: 1)
- Author: Stan Stockton <wa5rtg@gmail.com>
- Date: Mon, 19 Dec 2022 10:28:30 -0600
- 350 feet is about 5 quarter wavelengths at 3.8 MHz. Quarter wavelength is about 65 feet or so. If that thing is really 350 feet long you should see resonance at about 700 kHz, in addition to every od
- /archives//html/Towertalk/2022-12/msg00119.html (8,266 bytes)
- 4. Re: [TowerTalk] t type antenna (score: 1)
- Author: "Lux, Jim" <jim@luxfamily.com>
- Date: Mon, 19 Dec 2022 08:32:41 -0800
- On 12/19/22 8:28 AM, Stan Stockton wrote: 350 feet is about 5 quarter wavelengths at 3.8 MHz. Quarter wavelength is about 65 feet or so. If that thing is really 350 feet long you should see resonance
- /archives//html/Towertalk/2022-12/msg00120.html (9,139 bytes)
- 5. Re: [TowerTalk] t type antenna (score: 1)
- Author: <john@kk9a.com>
- Date: Mon, 19 Dec 2022 12:01:08 -0500
- I was also trying to understand the 300 foot top hat. I have never seen that even on top band. It would be easy to model to see where it's resonant. John KK9A 350 feet is about 5 quarter wavelengths
- /archives//html/Towertalk/2022-12/msg00121.html (8,203 bytes)
- 6. Re: [TowerTalk] t type antenna (score: 1)
- Author: n1bkb--- via TowerTalk <towertalk@contesting.com>
- Date: Mon, 19 Dec 2022 17:51:20 +0000 (UTC)
- Different kind of antenna.... Many, many ears ago when I was the signal officer for an army air traffic unit, we operated a low frequency, non-directional beacon. Our authorization was for 399 kHz a
- /archives//html/Towertalk/2022-12/msg00124.html (10,424 bytes)
- 7. Re: [TowerTalk] t type antenna (score: 1)
- Author: Stan Stockton <wa5rtg@gmail.com>
- Date: Mon, 19 Dec 2022 12:10:11 -0600
- If it is 300 feet total horizontal with vertical part at midpoint, I think it is resonant about 3.55 and 350 total horizontal about 3.12 Mhz. If you match it wherever it is resonant it looks like the
- /archives//html/Towertalk/2022-12/msg00125.html (10,818 bytes)
- 8. Re: [TowerTalk] t type antenna (score: 1)
- Author: "Lux, Jim" <jim@luxfamily.com>
- Date: Mon, 19 Dec 2022 11:15:22 -0800
- On 12/19/22 12:57 AM, w5jmw@towerfarm.net wrote: Hello all.I have a t antenna.50ft vertical and roughly 300 ft ntip to tip horizontal.I get a nice drop and resonance at abt 3.8 mhz.Is this weird reso
- /archives//html/Towertalk/2022-12/msg00126.html (8,242 bytes)
- 9. Re: [TowerTalk] t type antenna (score: 1)
- Author: Richard Karlquist <richard@karlquist.com>
- Date: Mon, 19 Dec 2022 14:17:46 -0800
- I once constructed an emergency 160 meter vertical out of a 60 foot mast made of aluminum irrigation pipe along with a top hat consisting of two 120 foot "umbrella wires" that I cut to length to make
- /archives//html/Towertalk/2022-12/msg00127.html (9,937 bytes)
- 10. Re: [TowerTalk] t type antenna (score: 1)
- Author: <john@kk9a.com>
- Date: Mon, 19 Dec 2022 20:35:06 -0500
- W5JMW said the top hat is roughly 300 feet, perhaps it's a little shorter? John KK9A NEC shows resonance around 3.4 MHz, and no other resonance around 2.2. So I'd guess you've got something else goin
- /archives//html/Towertalk/2022-12/msg00128.html (8,207 bytes)
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