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Total 78 documents matching your query.

41. Re: [TowerTalk] SteppIR (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Sun, 1 Jul 2007 19:18:55 -0400; Adding ground gain was a trick some manufacturers used to inflate the specs in their ads. That led to QST banning any gain claims for decades. I prefer the very basic dBi, then you can toss in the ex; /archives//html/Towertalk/2007-07/msg00028.html (20,541 bytes)
42. [TowerTalk] SteppIr (score: 1): Author: "Anthony DeBiasi" <K2SG@comcast.net>; Date: Thu, 24 Feb 2011 22:03:48 -0500; This is really funny and silly, its NOT a monobander and its NOT a tribander, its a SteppIR! _______________________________________________ _______________________________________________ TowerTalk; /archives//html/Towertalk/2011-02/msg00455.html (6,845 bytes)
43. Re: [TowerTalk] SteppIr (score: 1): Author: "Frosty" <frosty1@pdq.net>; Date: Thu, 24 Feb 2011 21:09:10 -0600; Some people call it lots of other things. Charles F. Frost Frosty K5LBU frosty1@pdq.net This is really funny and silly, its NOT a monobander and its NOT a tribander, its a SteppIR! __________________; /archives//html/Towertalk/2011-02/msg00456.html (7,466 bytes)
44. [TowerTalk] SteppIR (score: 1): Author: Al Kozakiewicz <akozak@hourglass.com>; Date: Fri, 27 Feb 2015 14:51:44 +0000; I was tempted to hijack the Mosley thread, but it should probably be allowed to die peacefully. I discovered a few years ago that you can't ask any questions where an honest answer might be construed; /archives//html/Towertalk/2015-02/msg00503.html (10,100 bytes)
45. Re: [TowerTalk] SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Feb 2015 10:27:18 -0500; There is no trade-off in gain. Gain is almost entirely a function of boom length as long as you don't have to few elements. For example, SteppIR antennas all show more gain on 10/12 meters than the; /archives//html/Towertalk/2015-02/msg00504.html (11,846 bytes)
46. Re: [TowerTalk] SteppIR (score: 1): Author: W0MU Mike Fatchett <w0mu@w0mu.com>; Date: Fri, 27 Feb 2015 09:19:25 -0700; I have been using SteppIR since about 2004. W4TV pretty much hit the gain question. Pros: * Multi monobanders with no interaction from other elements as they don't exist. * Ability to use bidirection; /archives//html/Towertalk/2015-02/msg00505.html (11,870 bytes)
47. Re: [TowerTalk] SteppIR (score: 1): Author: "Steve Jones" <n6sj@earthlink.net>; Date: Fri, 27 Feb 2015 09:00:49 -0800; Another thing to consider is that with a fixed multi-mono yagi design, all the gain and F/B specs are at the design frequency. If the design freq is 14200 KHz, then the gain and F/B degrade at 14020; /archives//html/Towertalk/2015-02/msg00506.html (13,284 bytes)
48. Re: [TowerTalk] SteppIR (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Fri, 27 Feb 2015 11:16:58 -0600; Nice summary Mike. All antennas have compromises. A few years ago there was someone on towertalk who could not get the SteppIR motors to function due to having too long of a control line even with th; /archives//html/Towertalk/2015-02/msg00507.html (8,738 bytes)
49. Re: [TowerTalk] SteppIR (score: 1): Author: W0MU Mike Fatchett <w0mu@w0mu.com>; Date: Fri, 27 Feb 2015 10:28:09 -0700; I forgot to mention we have a steppIR yahoo group. https://groups.yahoo.com/neo/groups/SteppIR/info I am one of the moderators. There was an issue found with the surge protectors they got from Array; /archives//html/Towertalk/2015-02/msg00508.html (9,567 bytes)
50. Re: [TowerTalk] SteppIR (score: 1): Author: n8de@thepoint.net; Date: Fri, 27 Feb 2015 13:20:36 -0500; One other 'con' that does not seem to be mentioned yet: The element spacing is a compromise on ALL bands, so gain and f/r will be less than optimum on any band. 73 Don N8DE I forgot to mention we hav; /archives//html/Towertalk/2015-02/msg00509.html (10,864 bytes)
51. Re: [TowerTalk] SteppIR (score: 1): Author: W0MU Mike Fatchett <w0mu@w0mu.com>; Date: Fri, 27 Feb 2015 11:44:29 -0700; As pointed out by W4TV when you can vary the element lengths the spacing is less of a concern. The boom is the limiting factor and this is true with any multiband antenna. Mike W0MU The element spaci; /archives//html/Towertalk/2015-02/msg00510.html (11,007 bytes)
52. Re: [TowerTalk] SteppIR (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Fri, 27 Feb 2015 14:10:44 -0600; To some degree this is true but I am not sure that you can have optimum spacing for that big of a frequency range and still maintain a constant impedance. It would be nice to see a model. John KK9A A; /archives//html/Towertalk/2015-02/msg00511.html (7,533 bytes)
53. Re: [TowerTalk] SteppIR (score: 1): Author: "Doug Turnbull" <turnbull@net1.ie>; Date: Fri, 27 Feb 2015 16:24:43 -0500; Joe and OMs, I do not believe a stepper motor has any brush contacts. It does not create the rotating magnetic field in this manner. There are alternate N and S poles on the rotor and the magnetic fi; /archives//html/Towertalk/2015-02/msg00512.html (13,012 bytes)
54. Re: [TowerTalk] SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Feb 2015 16:39:32 -0500; Doug, The stepper motor does not have any brush contacts. The *elements* have brush contacts at the center - where the feedline connects to the driven element and where the parasitic elements are sho; /archives//html/Towertalk/2015-02/msg00513.html (9,964 bytes)
55. Re: [TowerTalk] SteppIR (score: 1): Author: "Doug Turnbull" <turnbull@net1.ie>; Date: Fri, 27 Feb 2015 16:46:43 -0500; Joe, Yes, I am happy with what you say and apologize for misreading your post. 73 Doug EI2CN Doug, The stepper motor does not have any brush contacts. The *elements* have brush contacts at the center; /archives//html/Towertalk/2015-02/msg00514.html (10,854 bytes)
56. Re: [TowerTalk] SteppIR (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 27 Feb 2015 16:48:26 -0500; There are several antenna designers who have shown that the impedance a simple driven element is in the mid-20 Ohm range when the antenna is tuned for maximum gain (assuming the boom is not too long; /archives//html/Towertalk/2015-02/msg00515.html (8,151 bytes)
57. Re: [TowerTalk] SteppIR (score: 1): Author: Paul Christensen <w9ac@arrl.net>; Date: Fri, 27 Feb 2015 16:54:52 -0500; Joe, Nice explanation of the SteppIR antennas. Paul, W9AC There is no trade-off in gain. Gain is almost entirely a function of boom length as long as you don't have to few elements. For example, Step; /archives//html/Towertalk/2015-02/msg00516.html (12,431 bytes)
58. Re: [TowerTalk] SteppIR (score: 1): Author: "Dick Green WC1M" <wc1m73@gmail.com>; Date: Fri, 27 Feb 2015 22:09:11 -0500; I believe the brushes Joe mentioned are the ones that connect the balun to the copper-beryllium element ribbons. Nothing to do with the stepper motors but another potential point of failure. 73, Dick; /archives//html/Towertalk/2015-02/msg00517.html (14,510 bytes)
59. [TowerTalk] SteppIR (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Sat, 28 Feb 2015 04:26:38 -0800; Another thing to consider is that with a fixed multi-mono yagi design, all the gain and F/B specs are at the design frequency. If the design freq is 14200 KHz, then the gain and F/B degrade at 14020; /archives//html/Towertalk/2015-02/msg00520.html (11,027 bytes)
60. Re: [TowerTalk] SteppIR (score: 1): Author: Michael Dinkelman <mwdink@gmail.com>; Date: Fri, 27 Feb 2015 12:13:51 -0800; You wouldn't want to do that because everything with Mosley in the title simply goes in the trash now. Thank goodness for filters. _______________________________________________ ____________________; /archives//html/Towertalk/2015-02/msg00522.html (9,928 bytes)

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