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Total 11 documents matching your query.

1. Topband: Beverage transformers (score: 1): Author: Carsten.Esch@APPELLO.DE (Carsten Esch); Date: Wed, 8 Jan 2003 12:32:43 +0100; Hi, I am planning to build some 9:1 Transformers described on Toms page at http://www.w8ji.com/beverages.htm using 73 mix binocular cores. My local supplier has a choice of two. 1. BN 73-202 with an; /archives//html/Topband/2003-01/msg00040.html (6,737 bytes)
2. Topband: Beverage transformers (score: 1): Author: jon.zaimes@dol.net (Jon Zaimes AA1K); Date: Wed, 08 Jan 2003 17:30:20 -0500; Hello Carsten, No. 1 is the one specified by Tom -- just a different way of expressing the Fair Rite Products 2873000202 number. No. 2 is about half the size -- with half-size holes for the wire -- a; /archives//html/Topband/2003-01/msg00044.html (6,598 bytes)
3. Topband: Beverage Transformers (score: 1): Author: Thomas Giella, KN4LF" <kn4lf@arrl.net (Thomas Giella, KN4LF); Date: Mon, 15 Jul 2002 10:01:15 -0400; I have used both the conventional multiple filar winding transformers as covered in ON4UN's book and the isolation transformers too. I have personally found the best performance as far as reduced noi; /archives//html/Topband/2002-07/msg00087.html (7,295 bytes)
4. Topband: Beverage Transformers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 15 Jul 2002 22:49:00 -0400; It is a mistake to think the only problem caused by not using isolated windings is noise. While that probably is a common problem, feedline common mode can also cause a loss of directivity without ad; /archives//html/Topband/2002-07/msg00097.html (9,313 bytes)
5. Topband: Beverage transformers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 7 Sep 1999 12:40:11 -0400; If you use 73 material cores about 1 or two inches of stack height, a two turn primary is enough for 75 ohms. It is the area inside the core exposed to the wire and the number of turns that mainly co; /archives//html/Topband/1999-09/msg00027.html (7,091 bytes)
6. TopBand: beverage transformers (score: 1): Author: k3nd@yahoo.com (GALE STEWARD); Date: Mon, 1 Mar 1999 05:49:03 -0800 (PST); Some years ago I built some 9:1 xformers for the 6 beverages at the W3GM contest station. I used some small binocular ferrite cores that were used in CATV cable tap boxes. They worked great thru the; /archives//html/Topband/1999-03/msg00004.html (7,185 bytes)
7. TopBand: beverage transformers (score: 1): Author: rick@area.com (rick@area.com); Date: 27 Feb 1999 03:25:17 -0000; With the recent discussion of beverage matching transformers, I am curious about why everyone builds their own matching transformers. On my 600 ft beverage, I am using a little RF Prime/Mini-Circuits; /archives//html/Topband/1999-02/msg00146.html (7,128 bytes)
8. TopBand: beverage transformers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 27 Feb 1999 18:53:41 -0500; Hi Rick, While both work, a 73 core takes 1/3 the number of turns as 43 material for the same core style, offering better bandwidth and easier construction. In either case the transformer certainly d; /archives//html/Topband/1999-02/msg00150.html (8,191 bytes)
9. TopBand: beverage transformers (score: 1): Author: i4ewh@sira.it (Paolo Zaffi); Date: Sat, 27 Feb 1999 23:34:31 +0100; I'm working around a 250 m beverage, and winding with the same transformer, but I'm using a very old blue toroid discovered in my scrap box. It is the same, or a grey toroid is absolutely required? T; /archives//html/Topband/1999-02/msg00151.html (7,056 bytes)
10. TopBand: beverage transformers (score: 1): Author: n7rt@doitnow.com (Hardy Landskov); Date: Sun, 28 Feb 1999 08:15:03 -0700; I also use the 9:1 Mini Circuits on my Beverages and they seem to work fine. I measure 20 to 25 dB return loss on each Beverage so the match is very good. My only concern would be in an area that had; /archives//html/Topband/1999-02/msg00152.html (7,215 bytes)
11. TopBand: Beverage Transformers (score: 1): Author: csus04@lmpsil02.comm.mot.com (Raymond Dave-CSUS04); Date: Wed, 16 Sep 1998 09:30:59 -0500; Am curious to know if there are any commercially available 2 wire beverage matching and termination transformers? I have been building my own, but would like to know for someone else if there is anyt; /archives//html/Topband/1998-09/msg00104.html (6,764 bytes)

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