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Total 19 documents matching your query.

1. [Amps] Henry 2k-4 HV inductor (score: 1): Author: Elliott L <kilocharlie8@gmail.com>; Date: Tue, 12 Dec 2017 12:52:00 -0800; Hi All, I recently purchased a Henry 2k-4 with a high-voltage fault. The fault has been traced to the inductor, L201, which is located directly after the bridge rectifier. The value, according to the; /archives//html/Amps/2017-12/msg00088.html (7,823 bytes)
2. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "David Harmon" <k6xyz@sbcglobal.net>; Date: Tue, 12 Dec 2017 15:13:48 -0600; Henry amp iron was notorious for being failure prone in that era....I know....I lost the choke in my 3K-A after just over 2 years....out of warrantee. A guy at the Henry factory told me their iron wa; /archives//html/Amps/2017-12/msg00089.html (9,753 bytes)
3. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "David Harmon" <k6xyz@sbcglobal.net>; Date: Tue, 12 Dec 2017 15:19:51 -0600; Correction....Gary Brown WZ1M is the correct call. 73 David Harmon K6XYZ Sperry, OK Henry amp iron was notorious for being failure prone in that era....I know....I lost the choke in my 3K-A after jus; /archives//html/Amps/2017-12/msg00090.html (10,411 bytes)
4. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Tue, 12 Dec 2017 16:28:08 -0500; Hi Elliott W6EL L: I recently purchased a Henry 2k-4 with a high-voltage fault. The fault has been traced to the inductor, L201, which is located directly after the bridge rectifier. The value, accor; /archives//html/Amps/2017-12/msg00091.html (7,794 bytes)
5. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Gary Schafer" <garyschafer@largeriver.net>; Date: Tue, 12 Dec 2017 20:11:09 -0600; Be careful of changing the inductance. I am not real familiar with the Henry amp but you seem to indicate that there is a small capacitor in parallel with the choke that would indicate that it is a t; /archives//html/Amps/2017-12/msg00092.html (10,469 bytes)
6. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "David Gow" <d.gow@frontier.com>; Date: Tue, 12 Dec 2017 18:31:15 -0800; I also had a choke fail in my 3KA. Gary ( another ham sent you his call) rewound it for me and did a great job. It does need to be the same inductance as Henry did use resonant chokes with a small ca; /archives//html/Amps/2017-12/msg00094.html (9,619 bytes)
7. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Wed, 13 Dec 2017 05:19:53 -0600; Forget the tuned choke stuff, that's been shown to be unreliable. If you want a choke input filter, get a 10 henry choke and follow it with a bypass oil cap of at least 8 mfd rated for the B+ with so; /archives//html/Amps/2017-12/msg00095.html (7,795 bytes)
8. [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 13 Dec 2017 10:15:56 -0800; <Forget the tuned choke stuff, that's been shown to be unreliable. If <you want a choke input filter, get a 10 henry choke and follow it with <a bypass oil cap of at least 8 mfd rated for the B+ with; /archives//html/Amps/2017-12/msg00096.html (12,472 bytes)
9. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Gary Schafer" <garyschafer@largeriver.net>; Date: Wed, 13 Dec 2017 13:52:04 -0600; A tuned choke is used to enable a smaller choke to be used. A tuned choke filter has much better dynamic regulation than a conventional choke circuit. A conventional choke is undesirable for SSB use.; /archives//html/Amps/2017-12/msg00097.html (15,726 bytes)
10. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Wed, 13 Dec 2017 21:16:22 -0500; /* snip */ 1950s. IF the choke and parallel resonating cap just happen to resonate at 120 hz, the peak V across that parallel tuned choke will skyrocket, and both the cap and choke will explode. Typ; /archives//html/Amps/2017-12/msg00098.html (8,609 bytes)
11. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 14 Dec 2017 10:47:46 -0500; W8JI experienced serious fireworks doing that A tuned choke is used to enable a smaller choke to be used. A tuned choke filter has much better dynamic regulation than a conventional choke circuit. A; /archives//html/Amps/2017-12/msg00099.html (16,005 bytes)
12. [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 14 Dec 2017 09:56:21 -0800; /* snip */ /* snip */ < I must have been taught all wrong, I was taught the capacitor (to <ground) is in series with the series inductor forming a series resonant <circuit that conducts the 120 Hz to; /archives//html/Amps/2017-12/msg00100.html (11,996 bytes)
13. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: Steve Wright <stevewrightnz@gmail.com>; Date: Fri, 15 Dec 2017 07:48:37 +1300; I suppose the rectifier is high-impedance at 120Hz ? S _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2017-12/msg00103.html (8,831 bytes)
14. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: Elliott L <kilocharlie8@gmail.com>; Date: Thu, 14 Dec 2017 10:46:56 -0800; Alright, there were some really interesting comments on this question, thank you all! If I were to ditch the HV choke and keep the plate transformer, can I simply add additional caps in parallel with; /archives//html/Amps/2017-12/msg00104.html (14,356 bytes)
15. [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 14 Dec 2017 12:15:28 -0800; <Alright, there were some really interesting comments on this question, ,thank you all! <If I were to ditch the HV choke and keep the plate transformer, can I simply add additional caps in parallel w; /archives//html/Amps/2017-12/msg00106.html (9,691 bytes)
16. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Fri, 22 Dec 2017 08:37:01 -0500; Alright, there were some really interesting comments on this question, thank you all! If I were to ditch the hV choke and keep the plate transformer, can I simply add additional caps in parallel wit; /archives//html/Amps/2017-12/msg00117.html (10,038 bytes)
17. [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 22 Dec 2017 10:15:52 -0800; < The primary advantage of using a L or Pi filter (rather than a brute <force {just capacitance} filter) is the reduced amount of energy stored <in capacitance which is undesirable when an arc is exp; /archives//html/Amps/2017-12/msg00118.html (12,254 bytes)
18. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: "Jim Garland" <4cx250b@miamioh.edu>; Date: Fri, 22 Dec 2017 14:08:54 -0700; Jim gives good advice here. A combination of a glitch resistor to limit flashover surge from the filter capacitor, plus an HV fuse close to the tube HV feed, is cheap and important protection. One ad; /archives//html/Amps/2017-12/msg00119.html (15,947 bytes)
19. Re: [Amps] Henry 2k-4 HV inductor (score: 1): Author: donroden@hiwaay.net; Date: Sun, 24 Dec 2017 11:52:10 -0600; Some good points, but I have used parallel caps on HV input inductors with great results. Collins used a parallel capacitor on their power supplies for the Collins KWM2 transceiver. Select the proper; /archives//html/Amps/2017-12/msg00141.html (11,366 bytes)

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