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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TenTec\]\s+Built\s+in\s+SWR\s+meter\s+bannans\s*$/: 53 ]

Total 53 documents matching your query.

41. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Wed, 24 Apr 2013 11:29:15 +0200
... Steve's analysis is correct. The same analysis repeated for a high impedance antenna will quickly reveal difficulties of using a ferrite chokes with antenna impedances in the hundreds of Ohms ran
/archives//html/TenTec/2013-04/msg00284.html (10,096 bytes)

42. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Steve Hunt <steve@karinya.net>
Date: Wed, 24 Apr 2013 11:54:38 +0100
That's correct! So if I were a tuner manufacturer I might be tempted to use an iron powder core for the balun rather than a "lossy" mix like #31 or #43 - the customer probably wont spot that it achie
/archives//html/TenTec/2013-04/msg00285.html (10,757 bytes)

43. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Jim Brown <k9yc@audiosystemsgroup.com>
Date: Wed, 24 Apr 2013 09:28:41 -0700
That is a common, but incorrect assumption. My statement is on the basis of a controlled experiment, running 1.5kW through a choke for a while and FEELING both the wire and the core. The wire heats,
/archives//html/TenTec/2013-04/msg00291.html (10,747 bytes)

44. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Wed, 24 Apr 2013 19:42:58 +0200
All cores are lossy, and their loss manifests itself by heat generation within the core whenever there is an RF field inside the core. This has nothing to do with wires. running 1.5kW through a chok
/archives//html/TenTec/2013-04/msg00299.html (11,281 bytes)

45. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Stuart Rohre <rohre@arlut.utexas.edu>
Date: Wed, 24 Apr 2013 14:00:52 -0500
The definitive work on baluns are Jerry Sevick's (sk) books. See "Baluns and Ununs". He has many experimental examples, specifications and results. -Stuart Rohre _____________________________________
/archives//html/TenTec/2013-04/msg00301.html (10,012 bytes)

46. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: shristov <shristov@ptt.rs>
Date: Wed, 24 Apr 2013 21:35:11 +0200
Jerry's treatment of choke baluns has a serious shortcoming: he tested his choke baluns in transmission mode only (i.e. as transmission lines), entirely neglecting the critical aspect of common mode
/archives//html/TenTec/2013-04/msg00302.html (10,090 bytes)

47. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Steve Hunt <steve@karinya.net>
Date: Wed, 24 Apr 2013 20:54:08 +0100
Certainly Sevick's books are some of the very few available on the topic, but I'm not sure I would call them "definitive works". I know that may appear to be heresy, but I've now "invested" in 3 of S
/archives//html/TenTec/2013-04/msg00304.html (11,045 bytes)

48. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Stuart Rohre <rohre@arlut.utexas.edu>
Date: Wed, 24 Apr 2013 15:00:26 -0500
teflon insulation on wire has been used for high power beam trap construction. Look in the QST archives. For any plastic chosen, make sure there are no sharp bends that might cause the insulation to
/archives//html/TenTec/2013-04/msg00307.html (10,265 bytes)

49. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Wed, 24 Apr 2013 22:30:54 +0200
Steve, Sevick is right. You "can" wind a 4:1 Guanella balun on a single core. I guess the question is, how well does it work? I have tried it both ways. In fact I was using dual core's for a couple o
/archives//html/TenTec/2013-04/msg00308.html (12,051 bytes)

50. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Stuart Rohre <rohre@arlut.utexas.edu>
Date: Wed, 24 Apr 2013 15:51:41 -0500
But would not common mode or unbalance currents be lower than transmission mode currents? (This may relate to impedances at point of insertion of a balun.) Stuart Rohre K5KVH ________________________
/archives//html/TenTec/2013-04/msg00310.html (9,948 bytes)

51. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Steve Hunt <steve@karinya.net>
Date: Wed, 24 Apr 2013 22:42:18 +0100
If you wind a 4:1 Guanella balun as two identical 1:1 chokes on a common core, you force the CM voltages across the two chokes to be the same because they share the same flux. If we call the input vo
/archives//html/TenTec/2013-04/msg00311.html (12,329 bytes)

52. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: Jim Brown <k9yc@audiosystemsgroup.com>
Date: Wed, 24 Apr 2013 15:27:45 -0700
I agree on all counts, Steve. 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
/archives//html/TenTec/2013-04/msg00312.html (10,335 bytes)

53. Re: [TenTec] Built in SWR meter bannans (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Thu, 25 Apr 2013 08:01:19 +0200
EXCELLENT! Pretty convincing, Steve. That explains the results I've seen on one of my recent antenna projects. I have been trying to build an Ultra-Light OCFD for SOTA and have the antenna doing what
/archives//html/TenTec/2013-04/msg00318.html (13,969 bytes)

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