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Total 29 documents matching your query.

1. [TowerTalk] Best Balun (score: 1): Author: "Wilson" <infomet@embarqmail.com>; Date: Wed, 26 Nov 2014 16:50:13 -0500; Some of my points may not have been obvious and there were a couple of comments. 1. The question was about 1:1 baluns. Transformers for other impedances are obviously great. 2. My remarks about loss; /archives//html/Towertalk/2014-11/msg00525.html (8,743 bytes)
2. Re: [TowerTalk] Best Balun (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Wed, 26 Nov 2014 14:22:47 -0800; -- ORIGINAL MESSAGE --(may be snipped) REPLY: My first transmitter was a 2E26 built on a junked TV chassis when I was 15. It looked horrible but it worked. It was all I could afford. Having done it b; /archives//html/Towertalk/2014-11/msg00526.html (7,560 bytes)
3. Re: [TowerTalk] Best Balun (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Wed, 26 Nov 2014 22:54:15 +0000; On 26/11/2014 21:50, Wilson wrote: 3. As for balance, theres a good bit of impedance in a wavelength or two of coax shield, so I doubt if the shield end at the top is actually very near ground. Lengt; /archives//html/Towertalk/2014-11/msg00528.html (9,142 bytes)
4. Re: [TowerTalk] Best Balun (score: 1): Author: Charlie Gallo <Charlie@TheGallos.com>; Date: Wed, 26 Nov 2014 18:35:24 -0500; <snip> Any length of Steve, Change that to any REASONABLE length, I'll agree, but what happens if the length is long enough that R becomes dominant? I mean, say RG-8, the reistance of the center cond; /archives//html/Towertalk/2014-11/msg00529.html (7,470 bytes)
5. Re: [TowerTalk] Best Balun (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Wed, 26 Nov 2014 19:43:03 -0500; You're feeding a dummy load - it won't matter. With RG-8/RG-213 having ~ 1dB/100 ft at 30 MHz, the feedline alone has 500 dB(!) loss. 73, ... Joe, W4TV <snip> Any length of wire a multiple of a half; /archives//html/Towertalk/2014-11/msg00531.html (8,036 bytes)
6. Re: [TowerTalk] Best Balun (score: 1): Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>; Date: Wed, 26 Nov 2014 21:02:45 -0400; Thanks for all the wonderful suggestions (many off line) for a better balun than my BN-86's. I just ordered from Force 12 (Chip K7JA) their bead balun model EB-1 as this is easier for me to install o; /archives//html/Towertalk/2014-11/msg00532.html (8,586 bytes)
7. Re: [TowerTalk] Best Balun (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 26 Nov 2014 17:20:38 -0800; AAARGH! Most strings of beads are terrible chokes, because they are inductive, not resistive, at the operating frequencies. This is discussed in the tutorial I referenced earlier in this thread. 73,; /archives//html/Towertalk/2014-11/msg00533.html (8,627 bytes)
8. Re: [TowerTalk] Best Balun (score: 1): Author: "James C. Hall, MD" <heartdoc@nwtcc.com>; Date: Wed, 26 Nov 2014 19:48:18 -0600; I have to agree with Jim here. The old B-1 balun Force 12 sold was not very good - I managed to burn out a couple. The SWR was never as flat as with the 'ugly balun'. :) 73, Jamie WB4YDL AAARGH! Most; /archives//html/Towertalk/2014-11/msg00534.html (8,741 bytes)
9. Re: [TowerTalk] Best Balun (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Wed, 26 Nov 2014 18:26:09 -0800; On 11/26/14, 5:20 PM, Jim Brown wrote: On Wed,11/26/2014 5:02 PM, Herbert Schoenbohm wrote: (Chip K7JA) their bead balun model EB-1 as this is easier for me to install on the boom compared to the Com; /archives//html/Towertalk/2014-11/msg00535.html (8,956 bytes)
10. Re: [TowerTalk] Best Balun (score: 1): Author: <john@kk9a.com>; Date: Wed, 26 Nov 2014 22:56:39 -0500; Mounting Nema box baluns to a boom can be easily and securely done if you make a mounting plate. I use 1/4 thick aluminum and mount the box to the plate using four 10-32 screws though the box's feet.; /archives//html/Towertalk/2014-11/msg00538.html (8,770 bytes)
11. Re: [TowerTalk] Best Balun (score: 1): Author: Wayne Kline <w3ea@hotmail.com>; Date: Wed, 26 Nov 2014 23:30:29 -0500; Another neat trick with a torrid wound balun. I weld a #10-32 1/2 machine screw to a 2" all stainless hose clamp jus 1" past the end of the tightening slots. I then drill a hole in the 4" dead center; /archives//html/Towertalk/2014-11/msg00539.html (8,986 bytes)
12. Re: [TowerTalk] Best Balun (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 26 Nov 2014 20:38:16 -0800; That's an exception -- a GOOD one, and was W2DU's choice for his choke balun. #73 puts the resonance in the middle of HF, so it's a good design. So I'll retract my negative comments about it -- IF it; /archives//html/Towertalk/2014-11/msg00540.html (9,520 bytes)
13. Re: [TowerTalk] Best Balun (score: 1): Author: Gary K9GS <garyk9gs@wi.rr.com>; Date: Wed, 26 Nov 2014 22:55:58 -0600; Like these? http://www.dxengineering.com/parts/dxe-ecls-200 They have other sizes available. On 11/26/2014 10:30 PM, Wayne Kline wrote: Another neat trick with a torrid wound balun. I weld a #10-32 1; /archives//html/Towertalk/2014-11/msg00542.html (10,004 bytes)
14. Re: [TowerTalk] Best Balun (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Thu, 27 Nov 2014 00:06:26 -0500; Sounds like mine, but I had a legal limit transmitter for my first project. Back in those days (1961) a B&W TV was a monster in weight, size, and power consumed even with a tiny screen compared to th; /archives//html/Towertalk/2014-11/msg00543.html (11,033 bytes)
15. Re: [TowerTalk] Best Balun (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 26 Nov 2014 21:31:29 -0800; On Wed,11/26/2014 1:50 PM, Wilson wrote: As for balance, theres a good bit of impedance in a wavelength or two of coax shield, so I doubt if the shield end at the top is actually very near ground. Th; /archives//html/Towertalk/2014-11/msg00544.html (10,054 bytes)
16. [TowerTalk] Best Balun (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 26 Nov 2014 22:31:30 -0800; they use a Amidon 73 mix for this particular balun I wonder why they don't use a 31 mix? tradition? beads over 303 teflon coax. http://www.force12inc.com/products/eb-1-1-8-to-30-mhz-high-power-1-1-fe; /archives//html/Towertalk/2014-11/msg00545.html (10,557 bytes)
17. Re: [TowerTalk] Best Balun (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Thu, 27 Nov 2014 02:54:05 -0500; I've wound a number of the "choke baluns", or just call them common mode chokes They don't take a lot of coax, or a lot of cores to be very effective. I've used them on inverted Vs, center fed, half; /archives//html/Towertalk/2014-11/msg00548.html (14,468 bytes)
18. Re: [TowerTalk] Best Balun (score: 1): Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>; Date: Thu, 27 Nov 2014 02:55:04 -0500; Sounds like mine, but I had a legal limit transmitter for my first project. Back in those days (1961) a B&W TV was a monster in weight, size, and power consumed even with a tiny screen compared to th; /archives//html/Towertalk/2014-11/msg00549.html (11,119 bytes)
19. Re: [TowerTalk] Best Balun (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Thu, 27 Nov 2014 09:21:36 +0000; http://www.w8ji.com/steel_wool_balun.htm Steve G3TXQ On a related balun question...many years ago before beads were easily obtained some hams claimed that their solution was to run there coax though; /archives//html/Towertalk/2014-11/msg00550.html (9,256 bytes)
20. [TowerTalk] Best Balun (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 27 Nov 2014 04:43:07 -0800; inch.... in tiny increments. http://www.dxengineering.com/search/brand/dx-engineering/product-line/dx-engineering-element-clamps Jim VE7RF Like these? http://www.dxengineering.com/parts/dxe-ecls-200; /archives//html/Towertalk/2014-11/msg00551.html (9,535 bytes)

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