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Total 72 documents matching your query.

61. Re: [Amps] plate choke (score: 1): Author: "Mark Marsden" <mm@plextek.co.uk>; Date: Fri, 26 Aug 2005 17:10:22 +0100; Hi Amp'ers When I was building my amp I spent a long time investigating plate chokes or feeding DC in from the antenna end. I made 5 chokes, and bought one from a UK manufacturer, but could never get; /archives//html/Amps/2005-08/msg00700.html (8,685 bytes)
62. Re: [Amps] plate choke (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 26 Aug 2005 12:43:35 EDT; There have been mis-designed chokes used before too! I have heard of some in some Henry amps where the few top turns would burn out. That was over SR and was cured by subtracting a few turns off the; /archives//html/Amps/2005-08/msg00701.html (8,163 bytes)
63. Re: [Amps] plate choke (score: 1): Author: R.Measures <r@somis.org>; Date: Fri, 26 Aug 2005 13:15:15 -0700; I measured such chokes and I did not find any resonances below about 35MHz. . Which frequency? ... Richard L. Measures, AG6K, 805.386.3734. www.somis.org _____________________________________________; /archives//html/Amps/2005-08/msg00706.html (9,941 bytes)
64. Re: [Amps] plate choke (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Fri, 26 Aug 2005 15:49:10 -0500; Life was much simpler when we only built 5-band amps years ago. With the addition of the 160, 60, 30, 17, and 12 meter bands, the choke building business got more complicated. Chokes that worked gre; /archives//html/Amps/2005-08/msg00707.html (9,743 bytes)
65. Re: [Amps] plate choke (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 26 Aug 2005 17:20:35 -0400; Dennis, That's happened several times, even comments on here about it. The last one was a good while back about a Henry, and the guy posted some pics of the choke. If I remember, myself and maybe Ric; /archives//html/Amps/2005-08/msg00708.html (10,375 bytes)
66. Re: [Amps] plate choke (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 26 Aug 2005 17:23:56 -0400; These were Ohmite Z-14 (The orange ones) chokes that I recall and had a RS around 23 MHz. They were used at 27 MHz but found the SR at 23 MHz with a dip meter. _______________________________________; /archives//html/Amps/2005-08/msg00709.html (10,922 bytes)
67. Re: [Amps] plate choke (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Fri, 26 Aug 2005 19:13:13 -0400; Phil, as usual, you have identified the problem(s) and given the solution, all in one easy paragraph. For those that doubt Phil's recommendation of the RF-3 sold at RF Parts, it costs under $25 and i; /archives//html/Amps/2005-08/msg00711.html (11,467 bytes)
68. Re: [Amps] plate choke (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Fri, 26 Aug 2005 18:22:05 -0700; I just wanted to see if there was a parallel resonance at work in the working operating range (as opposed to a nearly pure inductance). Presumeably any parallel resonance will be there regardless of; /archives//html/Amps/2005-08/msg00712.html (9,712 bytes)
69. Re: [Amps] plate choke (score: 1): Author: R.Measures <r@somis.org>; Date: Fri, 26 Aug 2005 18:46:12 -0700; I once made the mistake of not measuring the resonance when the choke was installed. The result was a choke fire on the low end of 20m. Richard L. Measures, AG6K, 805.386.3734. www.somis.org ________; /archives//html/Amps/2005-08/msg00713.html (10,138 bytes)
70. Re: [Amps] plate choke (score: 1): Author: Dennis12Amplify@aol.com; Date: Sat, 27 Aug 2005 06:24:56 EDT; Not necessarily. You see, when resonances occur hot spots can develop in the area that carries the current maximum. Presumably the resonance arose at the higher frequencies and that is precisely acti; /archives//html/Amps/2005-08/msg00715.html (8,098 bytes)
71. Re: [Amps] plate choke (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Sat, 27 Aug 2005 11:07:19 -0400; Yes but how many times do you need to hear the answer? Bob W6TR -- Original Message -- From: "KD7QAE" <KD7QAE@ARRL.NET> To: "Bob Maser" <bmaser@tampabay.rr.com> Sent: Saturday, August 27, 2005 2:08 A; /archives//html/Amps/2005-08/msg00716.html (13,320 bytes)
72. Re: [Amps] plate choke (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Sat, 27 Aug 2005 13:32:17 -0700; What answer? I still don't know if typical single-layer plate chokes rely on a parallel resonance to acheive suffcient low-end choking impedance; I still don't know if the impedance vs. frequency cu; /archives//html/Amps/2005-08/msg00728.html (10,244 bytes)

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