- 1. [TowerTalk] LPDA optimal height (score: 1)
- Author: "Jeff AC0C" <keepwalking188@ac0c.com>
- Date: Mon, 13 Feb 2017 18:06:18 -0600
- Im considering putting up an LPDA this summer to augment the existing stuff. The LPDA would serve two purposes: 1. 30m/17m/12m DX chasing. I suppose that really means 30/17 as I cant remember the las
- /archives//html/Towertalk/2017-02/msg00295.html (7,448 bytes)
- 2. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "StellarCAT" <rxdesign@ssvecnet.com>
- Date: Mon, 13 Feb 2017 19:39:33 -0500
- I believe you answered your own question - there isn't an idea height unless you have a specific purpose in mind. That said based on what you have I'd say 75' would be a good overall height - or keep
- /archives//html/Towertalk/2017-02/msg00299.html (8,831 bytes)
- 3. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: Ed via TowerTalk <towertalk@contesting.com>
- Date: Tue, 14 Feb 2017 07:18:43 +0300
- This is why people stack antennas. There is no ONE sweet spot. 100' is almost too high for 10m but perfect for 30m. I say put it up, if you already have the tower. I'm planning my own installation. I
- /archives//html/Towertalk/2017-02/msg00301.html (9,598 bytes)
- 4. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "john@kk9a.com" <john@kk9a.com>
- Date: Tue, 14 Feb 2017 07:23:58 -0500
- As you figured out, there is no perfect height. I would avoid going too high where you create nulls at critical angles. My question is why do you want to use a Log Periodic? I have never modeled one
- /archives//html/Towertalk/2017-02/msg00305.html (8,854 bytes)
- 5. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: <lstoskopf@cox.net>
- Date: Tue, 14 Feb 2017 11:52:52 -0500
- The LP antennas do what they are meant to do: cover all frequencies in their range. Maybe we don't need that and should pin point the maximum whatever. The SteppIR is a really good choice...and maybe
- /archives//html/Towertalk/2017-02/msg00309.html (7,817 bytes)
- 6. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: Guy Olinger <k2av@contesting.com>
- Date: Tue, 14 Feb 2017 11:56:20 -0500
- It's not the tools that are band-specific. The reflection formed vertical pattern is band specific. You are defeated in this by the laws of physics. Some partially solve this dilemma with stacks. Sta
- /archives//html/Towertalk/2017-02/msg00311.html (9,860 bytes)
- 7. [TowerTalk] LPDA optimal height (score: 1)
- Author: "Jim Thomson" <jim.thom@telus.net>
- Date: Tue, 14 Feb 2017 09:15:33 -0800
- As you figured out, there is no perfect height. I would avoid going too high where you create nulls at critical angles. My question is why do you want to use a Log Periodic? I have never modeled one
- /archives//html/Towertalk/2017-02/msg00312.html (8,651 bytes)
- 8. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "Steve Baughn" <baughn@centurylink.net>
- Date: Tue, 14 Feb 2017 12:45:03 -0500
- I currently use and have used for sometime a HyGain TH-11 at just over 70 feet. I also used LP's in the military..While I am working to improve my "farm" I can hold my own working DX. As has been not
- /archives//html/Towertalk/2017-02/msg00314.html (10,000 bytes)
- 9. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "Ed Sawyer" <sawyered@earthlink.net>
- Date: Tue, 14 Feb 2017 13:41:05 -0500
- There is no one perfect height for the "South facing yagi" for DX Contesting. Is it a Carib antenna, a zone 7 antenna, a PY/LU/CE antenna? Those are different heights for optimum angle for each band.
- /archives//html/Towertalk/2017-02/msg00315.html (8,737 bytes)
- 10. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "StellarCAT" <rxdesign@ssvecnet.com>
- Date: Tue, 14 Feb 2017 19:22:27 -0500
- yeah - on a 70' boom! That's something every ham has room for ... and the gain of a lowly (average) 3 element beam on each of them as well. Gary K9RX As you figured out, there is no perfect height. I
- /archives//html/Towertalk/2017-02/msg00321.html (9,465 bytes)
- 11. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "StellarCAT" <rxdesign@ssvecnet.com>
- Date: Tue, 14 Feb 2017 19:25:30 -0500
- actually correction - they have it as dbd and not dbi so indeed a decent 4 element yagi. Gary As you figured out, there is no perfect height. I would avoid going too high where you create nulls at cr
- /archives//html/Towertalk/2017-02/msg00322.html (9,196 bytes)
- 12. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: Gary Johnson <gwj@wb9jps.com>
- Date: Tue, 14 Feb 2017 19:19:32 -0800
- http://www.innovantennas.com/antennas-a-accesories/on-line-shop/view/productdetails/virtuemart_product_id/509/virtuemart_category_id/37.html Gary NA6O _______________________________________________
- /archives//html/Towertalk/2017-02/msg00326.html (8,915 bytes)
- 13. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: Ed via TowerTalk <towertalk@contesting.com>
- Date: Wed, 15 Feb 2017 06:54:08 +0300
- The benefit I see with an LPDA is the fact that you can operate multiple frequencies, simultaneously, like ALE. Likewise, it may be useful as a listening antenna if you have multiple receivers like a
- /archives//html/Towertalk/2017-02/msg00327.html (10,120 bytes)
- 14. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: jimlux <jimlux@earthlink.net>
- Date: Tue, 14 Feb 2017 21:45:42 -0800
- As you figured out, there is no perfect height. I would avoid going too high where you create nulls at critical angles. My question is why do you want to use a Log Periodic? I have never modeled one
- /archives//html/Towertalk/2017-02/msg00328.html (9,659 bytes)
- 15. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: jimlux <jimlux@earthlink.net>
- Date: Tue, 14 Feb 2017 21:49:13 -0800
- Is it a Carib antenna, a zone 7 antenna, a PY/LU/CE antenna? Those are different heights for optimum angle for each band. One beam at one height for 3 bands - whether a tribander or an LPDA - is alwa
- /archives//html/Towertalk/2017-02/msg00329.html (9,194 bytes)
- 16. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: Richard Thorne <rthorne@rthorne.net>
- Date: Wed, 15 Feb 2017 07:54:20 -0600
- I did some research on LPDA's not too long ago as I had a used M2 40 - 10 Log in hand. I ended up selling it to a local friend who is working on putting up his first tower. The price was right and wi
- /archives//html/Towertalk/2017-02/msg00330.html (10,592 bytes)
- 17. [TowerTalk] LPDA optimal height (score: 1)
- Author: Tom-W3FRG <w3frg1@gmail.com>
- Date: Wed, 15 Feb 2017 16:44:16 -0500
- And, as Jim mentioned, sloping the LPDA, you could also take the two booms and separate them to form a pyramid. Calculations would have to be made to insure the elements are correctly, and evenly spa
- /archives//html/Towertalk/2017-02/msg00332.html (6,625 bytes)
- 18. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: jimlux <jimlux@earthlink.net>
- Date: Wed, 15 Feb 2017 16:03:24 -0800
- Calculations would have to be made to insure the elements are correctly, and evenly spaced. Not a job for a wire LPDA at HF. I think you could do it with three towers and a wire LPDA.. of course, you
- /archives//html/Towertalk/2017-02/msg00333.html (7,881 bytes)
- 19. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: Steve London <n2icarrl@gmail.com>
- Date: Thu, 16 Feb 2017 09:41:17 -0700
- "Another promising LPDA design is the Band-Optimized LPDA by G0KSC of InnovAntennas. Theres an interview with him in the Jan/Feb NCJ. The article is fairly enlightening. The upshot is that its not ju
- /archives//html/Towertalk/2017-02/msg00343.html (9,166 bytes)
- 20. Re: [TowerTalk] LPDA optimal height (score: 1)
- Author: "john@kk9a.com" <john@kk9a.com>
- Date: Thu, 16 Feb 2017 14:24:59 -0500
- I am also not a fan of these types of testimonials. You can work DX with anything. I have accidentally called a DX station on the wrong band antenna with the SWR sky high and they came right back to
- /archives//html/Towertalk/2017-02/msg00346.html (9,135 bytes)
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