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Total 7 documents matching your query.

1. [AMPS] filament choke (score: 1): Author: alfredo@cln.it (Alfredo Rosati I5UXJ); Date: Wed, 01 Nov 2000 01:59:12 +0100; in tube with indirect catode is necessary to insert rf choke between the transformer and the filament? which can be the benefits? hello alfredo i5uxj -- FAQ on WWW: http://www.contesting.com/FAQ/amps; /archives//html/Amps/2000-10/msg00000.html (6,150 bytes)
2. Re: [Amps] Filament choke (score: 1): Author: R L Measures <R@somis.org>; Date: Tue, 30 May 2006 03:54:56 -0700; ED--8.8uH is enough for 1.8MHz provided that one cancels the XL with XC. In this case it would be c. 1000pF, which is added to C2 of the 160m tuned input. Chokes with ferrite cores are sensitive to f; /archives//html/Amps/2006-05/msg00500.html (7,564 bytes)
3. [Amps] filament choke (score: 1): Author: Angel Vilaseca <avilaseca@bluewin.ch>; Date: Mon, 18 Dec 2006 08:08:59 +0100; Hi, On almost every grounded-grid triode amp design I have seen, the filament choke is an abt 35 uH coil wound on a 1/2 inch dia, 7-inch long ferrite rod. Such a large unit is a bit cumbersome. Inste; /archives//html/Amps/2006-12/msg00129.html (6,520 bytes)
4. Re: [Amps] filament choke (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 18 Dec 2006 05:03:55 -0500; I've done that on very large amps. Depends on the core material selected. You have to look at flux density at PEAK cathode current and the number of bifilar turns. One thing about the open ended rod; /archives//html/Amps/2006-12/msg00130.html (8,964 bytes)
5. Re: [Amps] filament choke (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Mon, 18 Dec 2006 11:40:29 +0100 (CET); The filament chokes I use in my grid driven amplifier for applying NFB are wound on ferrite toroids, about 2 inches in diameter and 3/8 inch wide and thick. But they have lower inductance, as they on; /archives//html/Amps/2006-12/msg00131.html (7,479 bytes)
6. [Amps] Filament Choke (score: 1): Author: "Rich & DJ" <rdj@wildblue.net>; Date: Thu, 28 Jun 2007 14:16:02 -0500; Gentlemen is there a problem in winding a filament choke and using 10ga stranded with thin insulation instead of 10ga magnet wire. I have the stranded on hand, Rich , kd0zz __________________________; /archives//html/Amps/2007-06/msg00174.html (6,216 bytes)
7. Re: [Amps] Filament Choke (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Thu, 28 Jun 2007 21:15:17 -0400; Stranded & insulated can be used but it is very hard to form and control it on a ferrite rod. You can try tape or shrink tubing. Also consider the steady current and heat generated. At HF the perform; /archives//html/Amps/2007-06/msg00176.html (7,606 bytes)

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