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1. Topband: 160 Meter BALUNS (score: 1): Author: TNeill1648@aol.com; Date: Fri, 19 Dec 2003 22:24:12 EST; The thread on ferrite beads has been interesting. Tom, W8JI, suggest the air core wound BALUN for 160. Can anyone give me the diameter and number of turns of RG-213 or equivalent to use for a 160 air; /archives//html/Topband/2003-12/msg00161.html (6,432 bytes)
2. Re: Topband: 160 Meter BALUNS (score: 1): Author: Joe Reisert <W1JR@arrl.net>; Date: Sat, 20 Dec 2003 10:27:45 -0500; Hi Tom, 50 feet of RG8X close wound (about 10" long) on a 4 inch diameter PVC tube (regular plumbing supply white tubing) works great for a 80/160 balun. 73, Joe W1JR At 10:24 PM 12/19/2003, TNeill16; /archives//html/Topband/2003-12/msg00165.html (7,270 bytes)
3. Re: Topband: 160 Meter BALUNS (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Sat, 20 Dec 2003 20:17:41 -0500; That similar to the answer I gave in private mail, 30-50 feet of cable in a single layer 4" diameter. Such a balun actually works over a quite wide frequency range. Everyone should also be aware tha; /archives//html/Topband/2003-12/msg00170.html (10,357 bytes)
4. Re: Topband: 160 Meter BALUNS (score: 1): Author: Joe Reisert <W1JR@arrl.net>; Date: Mon, 22 Dec 2003 10:24:03 -0500; Hi Tom, A follow up to my prior EMail on a solenoid baluns. Regardless of whether 50 feet of RG8X wound on a solenoid (tube) is proper to use a balun or not, I'll leave that up to you and W8JI to dec; /archives//html/Topband/2003-12/msg00183.html (12,436 bytes)
5. Topband: 160 Meter BALUNS (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Mon, 22 Dec 2003 17:53:13 -0500; [This message is repeated because it didn't make through few days ago.] There are several point one should consider. 1. One doesn't have to prove that an antenna in question NEEDS a balun. On the con; /archives//html/Topband/2003-12/msg00188.html (10,555 bytes)
6. Re: Topband: 160 Meter BALUNS (score: 1): Author: "i4jmy@iol.it" <i4jmy@iol.it>; Date: Tue, 23 Dec 2003 09:51:50 +0100; RG8X is a fancy name chosen for commercial reasons and is not an official code for a qualified cable like other RGs. All foam cables without a rigid shield and a rigid jacket are infact very question; /archives//html/Topband/2003-12/msg00189.html (9,214 bytes)
7. Re: Topband: 160 Meter BALUNS (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Tue, 23 Dec 2003 08:01:59 -0500; <RG8X is a fancy name chosen for commercial reasons and is not an official code for a qualified cable like other RGs. I agree with that, except in practice I've used "RG8X" style cables for nearly al; /archives//html/Topband/2003-12/msg00194.html (9,387 bytes)
8. Re: Topband: 160 Meter BALUNS (score: 1): Author: "i4jmy@iol.it" <i4jmy@iol.it>; Date: Tue, 23 Dec 2003 15:59:58 +0100; Everyone has his own experiences, mine are different. Stated it, polyethylene is a thermoplastic material, foam PE also a good thermal insulator. High density compact polyethylene softens around 248&; /archives//html/Topband/2003-12/msg00197.html (8,264 bytes)
9. RE: Topband: 160 Meter BALUNS (score: 1): Author: "James Wolf" <jbwolf@comcast.net>; Date: Tue, 23 Dec 2003 19:27:01 -0500; Tom, If you get the chance could you try a coil that is tapered? I envision something along the lines of wrapping coax around those orange cones that are used at roadwork sites. There is a company (; /archives//html/Topband/2003-12/msg00200.html (8,302 bytes)
10. Re: Topband: 160 Meter BALUNS (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 23 Dec 2003 20:50:20 -0500; Here's a simple balun that works well on 80/160 which requires only 100 inches of RG-8X coax. I used it for many years in Colorado running 1.5 kW to a trapped dipole for 80/160 with no problems. The; /archives//html/Topband/2003-12/msg00202.html (9,299 bytes)
11. Re: Topband: 160 Meter BALUNS (score: 1): Author: Bill Tippett <btippett@alum.mit.edu>; Date: Tue, 23 Dec 2003 21:09:21 -0500; I believe the author was George Badger W6TC, "A new class of coaxial-line transformers" in the February and March 1980 issues of Ham radio. 73, Bill W4ZV _____________________________________________; /archives//html/Topband/2003-12/msg00203.html (7,924 bytes)
12. Re: Topband: 160 Meter BALUNS (score: 1): Author: "Arne Gjerning" <gjerning@flash.net>(by way of Bill Tippett<btippett@alum.mit.edu>); Date: Wed, 24 Dec 2003 06:34:15 -0500; Thanks for the corrections Arne! Bill On 160-40M the number of turns for both the coax and the wire should be 5 NOT 7. The nominal dia is about 6.5 inches. George used #10 or #12 wire NOT #16 in his; /archives//html/Topband/2003-12/msg00204.html (10,970 bytes)
13. Re: Topband: 160 Meter BALUNS (score: 1): Author: "i4jmy@iol.it" <i4jmy@iol.it>(by way of Bill Tippett<btippett@alum.mit.edu>); Date: Wed, 24 Dec 2003 06:34:53 -0500; Thanks to Bill post it occurred to me that's worth to point out that power rating of classical balun decreases dramatically in case of high SWR. I've seen a number of commercial ferrite, nominally 2K; /archives//html/Topband/2003-12/msg00205.html (8,749 bytes)
14. Re: Topband: 160 Meter BALUNS (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Wed, 24 Dec 2003 07:25:45 -0500; This design came when people thought voltage baluns were the desirable type, just before Lewallen W7EL and others started doing balun analysis and changed the mindset of people to preferring current; /archives//html/Topband/2003-12/msg00206.html (9,653 bytes)
15. RE: Topband: 160 Meter BALUNS (score: 1): Author: "James Wolf" <jbwolf@comcast.net>; Date: Wed, 24 Dec 2003 08:57:18 -0500; These baluns do work well. I use them on all my beams and tribanders. However, I use teflon coax which eliminates the need to seal anything. James Wolf, KR9U _________________________________________; /archives//html/Topband/2003-12/msg00207.html (12,051 bytes)
16. Re: Topband: 160 Meter BALUNS (score: 1): Author: "Arne Gjerning" <gjerning@flash.net>; Date: Wed, 24 Dec 2003 07:00:14 -0700; Tom As you suggested that 7 turns might be better, length of the coax strip point and wire should be increased to about 140 inches to maintain same diameter. I use mine on a Cushcraft 2el 40M yagi (s; /archives//html/Topband/2003-12/msg00208.html (11,192 bytes)
17. Re: Topband: 160 Meter BALUNS (score: 1): Author: "Tom Rauch" <w8ji@contesting.com>; Date: Mon, 29 Dec 2003 10:38:19 -0500; Rather than have fun in a contest so I could complain about how I didn't have fun because someone else who probably didn't win anyway used packet or went 65 in a 55 speed zone according to my RADAR,; /archives//html/Topband/2003-12/msg00261.html (9,189 bytes)
18. Re: Topband: 160 Meter BALUNS (score: 1): Author: "K9AY" <k9ay@k9ay.com>; Date: Tue, 30 Dec 2003 09:37:11 -0600; Hi Tom and all... I got the new QEX yesterday, and -- with excellent timing -- Zack Lau W1VT has published some of the same balun experiments that Tom has been working on. The results are essentially; /archives//html/Topband/2003-12/msg00287.html (9,853 bytes)

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