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Total 28 documents matching your query.

1. [TowerTalk] STEPPIR QUESTION (score: 1): Author: Bob Gibson <w5rg@yahoo.com>; Date: Sun, 12 Jul 2009 06:44:04 -0700 (PDT); Hi group...We had a bad Storm move in the area a few days ago and I may have been hit by lightning..we lost a TV..also now my 4 ele Steppir is not working..I think it is in the box itself..I have the; /archives//html/Towertalk/2009-07/msg00173.html (6,776 bytes)
2. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Sun, 12 Jul 2009 07:11:52 -0700 (PDT); I have seen this behavior when the load on the box is more than 30 ohms (but not an open circuit). I haven't been able to get SteppIR to tell me if this is bug or a "feature". You need to check the r; /archives//html/Towertalk/2009-07/msg00174.html (7,362 bytes)
3. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: Rick Stealey <rstealey@hotmail.com>; Date: Sun, 12 Jul 2009 15:53:59 +0000; Probably a zapped driver chip on the driver board in the controller. I had this exact problem this week. You can get chips from Mouser for about $2.25. Rick K2XT _____________________________________; /archives//html/Towertalk/2009-07/msg00175.html (7,156 bytes)
4. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Dick Green WC1M" <wc1m73@gmail.com>; Date: Sun, 12 Jul 2009 13:07:38 -0400; I have a 3-stack of 4-el SteppIRs and lost all three controllers in a lightning hit two years ago. All the driver chips were fried. The RS-232 interfaces mounted on the control boards were destroyed; /archives//html/Towertalk/2009-07/msg00176.html (11,532 bytes)
5. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Michael Ryan" <mryan001@tampabay.rr.com>; Date: Sun, 12 Jul 2009 13:20:57 -0400; Dick, Here on the west coast of Florida, the lightning capital of the US ( if not the world ), it comes as no surprise that there are lots of dangerous strikes in almost every thunderstorm. Some rece; /archives//html/Towertalk/2009-07/msg00177.html (12,990 bytes)
6. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "N2TK" <tony.kaz@verizon.net>; Date: Sun, 12 Jul 2009 19:23:56 -0400; Is there a way to build an external box with something like opto-isolators to better isolate the driver chips from getting nailed so easily? Maybe add MOV's to the opto-isolators? The breakdown volta; /archives//html/Towertalk/2009-07/msg00181.html (12,427 bytes)
7. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Dick Green WC1M" <wc1m73@gmail.com>; Date: Mon, 13 Jul 2009 12:25:48 -0400; It would be complicated to do that, and I'm not sure the opto-isolators could be protected. SteppIR has a new controller with optional remote driver board with optional surge protection. It uses a su; /archives//html/Towertalk/2009-07/msg00201.html (15,009 bytes)
8. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: Dan Zimmerman N3OX <n3ox@n3ox.net>; Date: Mon, 13 Jul 2009 13:31:04 -0400; to better isolate the driver chips from getting nailed so easily? Well, you need to build something that can source as much current as the driver chips. Wonder what happens if you replace each outpu; /archives//html/Towertalk/2009-07/msg00204.html (8,295 bytes)
9. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Dave - AB7E" <xdavid@cis-broadband.com>; Date: Mon, 13 Jul 2009 10:47:12 -0700; Having just had the induced surge from a lightning strike fry the controller for my PST-61D rotator (blown PC board traces at the connector for the control cable even with surge suppressors across th; /archives//html/Towertalk/2009-07/msg00205.html (9,222 bytes)
10. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Mon, 13 Jul 2009 20:16:21 -0700; Circuits made to take big transients would do something very much like that.. They use a fairly decent FET or IGBT with 100V or more. Then a fast clamp on the output (like a back to back thyristor/DI; /archives//html/Towertalk/2009-07/msg00230.html (9,088 bytes)
11. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Mon, 13 Jul 2009 20:18:35 -0700; Glass fiber isn't all that expensive in long lengths, and has much lower loss (plastic fiber is 1dB/ft), so you could put the drivers up on the tower, and just run isolated AC power up there. _______; /archives//html/Towertalk/2009-07/msg00231.html (8,759 bytes)
12. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "W5LT" <W5LT@verizon.net>; Date: Tue, 14 Jul 2009 16:47:58 -0500; You might check out the new SD-100 SteppIR controller. It is standard equipment on the DB-series antennas, and supposedly has a much more robust output circuit arrangement. The driver board can even; /archives//html/Towertalk/2009-07/msg00242.html (9,721 bytes)
13. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 14 Jul 2009 17:58:08 -0700; robust I just installed a 3-el with the new SD100 controller and the 33V power supply, and it's working just fine with 400 ft of 12-#22. Based on conversations with SteppIR, the primary cause of prob; /archives//html/Towertalk/2009-07/msg00250.html (9,297 bytes)
14. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Rick Karlquist" <richard@karlquist.com>; Date: Tue, 14 Jul 2009 18:26:33 -0700 (PDT); At the risk of disagreeing with an unnamed person at the factory, I am not convinced about the capacitance argument. I made up a jig with a bunch of series resistors to simulate a long cable. It had; /archives//html/Towertalk/2009-07/msg00253.html (10,133 bytes)
15. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 14 Jul 2009 19:23:38 -0700; You may be right. I haven't looked at the waveform, but a 300 Hz square wave will have harmonics well above 3 kHz. As to the capacitance -- 40pF/ft is typical for the generic sorts of cable that Step; /archives//html/Towertalk/2009-07/msg00257.html (9,674 bytes)
16. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Tue, 14 Jul 2009 20:35:48 -0700; Didn't know pro audio was 100 ohms. Good points, but here is some more evidence: I have 350 feet of cable feeding my MonstIR. Initially, it wouldn't work because the resistance was too high. I instal; /archives//html/Towertalk/2009-07/msg00260.html (11,125 bytes)
17. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 14 Jul 2009 21:31:27 -0700; resistance I agree with your conclusion. Only if the line is a significant fraction of a quarter wave at the frequency of interest. Shorter than that, it behaves as lumped R, L, and C. No control cab; /archives//html/Towertalk/2009-07/msg00265.html (10,361 bytes)
18. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Tue, 14 Jul 2009 23:39:57 -0500; If you read the data sheet for the L6219DS bridge driver IC, this will answer a lot of your questions about how the SteppIR drivers work and it should then be obvious why adding simple buffers or cla; /archives//html/Towertalk/2009-07/msg00266.html (12,066 bytes)
19. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: Rick Stealey <rstealey@hotmail.com>; Date: Wed, 15 Jul 2009 14:45:19 +0000; Nice work Jerry. I don't completely understand all, but it sounds to me as if you are saying something like the lines (i.e. pins 1-2, and 3-4 going to the driven element) are balanced. Meaning no cu; /archives//html/Towertalk/2009-07/msg00274.html (10,199 bytes)
20. Re: [TowerTalk] STEPPIR QUESTION (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Wed, 15 Jul 2009 11:43:04 -0500; My comments are interspersed with yours below: K2XT: "Nice work Jerry. I don't completely understand all, but it sounds to me as if you are saying something like the lines (i.e. pins 1-2, and 3-4 goi; /archives//html/Towertalk/2009-07/msg00279.html (14,899 bytes)

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