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Total 17 documents matching your query.

1. [AMPS] Choke input PS question (score: 1): Author: kd5izi_tech@yahoo.com (Randall DuCharme); Date: Sun, 21 Oct 2001 18:46:02 -0700 (PDT); Greetings, I'm building another power supply for my amplifier project. I originally set out to use a capacitor input design commonly used but have since (tonight) found a large (13H) choke. I was tol; /archives//html/Amps/2001-10/msg00416.html (8,182 bytes)
2. [AMPS] Choke input PS question (score: 1): Author: 2@vc.net (2); Date: Mon, 22 Oct 2001 02:43:20 -0700; Choke filters work well in applications where the load current is constant - such as RTTY, AM linear and FM. With SSB, where the load current is not constant, a choke filter causes a transient V reg; /archives//html/Amps/2001-10/msg00421.html (9,128 bytes)
3. [AMPS] Choke input PS question (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 22 Oct 2001 07:04:19 -0500; (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2001-10/msg00423.html (8,471 bytes)
4. [AMPS] Choke input PS question (score: 1): Author: k7fm@teleport.com (Lamb); Date: Mon, 22 Oct 2001 06:20:20 -0700; When using a large filter choke in my hv power supply, I experienced 2 problems. First, the collapsing field blew the diodes out. Second, there were resonances that caused problems at certain current; /archives//html/Amps/2001-10/msg00426.html (8,428 bytes)
5. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 14:30:33 +0100; I've used negative lead filtering and tuned choke input very successfully. By using the RIGHT value of capacitor, you can get quite good regulation - in conjunction with a suitable bleeder, of course; /archives//html/Amps/2001-10/msg00427.html (10,177 bytes)
6. [AMPS] Choke input PS question (score: 1): Author: kd5izi_tech@yahoo.com (Randall DuCharme); Date: Mon, 22 Oct 2001 06:43:45 -0700 (PDT); Interesting, And here I thought that the primary reason many modern amplifiers lacked heavy chokes was to save weight, space, and cost. :-) Something like this would have never occured to me. It's su; /archives//html/Amps/2001-10/msg00428.html (9,500 bytes)
7. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 14:49:40 +0100; As I said in my previous, you don't actually resonate the choke. A parallel tuned circuit looks like a pure resistance at resonance. That's using the definition of resonance that applied voltage and; /archives//html/Amps/2001-10/msg00429.html (9,756 bytes)
8. [AMPS] Choke input PS question (score: 1): Author: 2@vc.net (2); Date: Mon, 22 Oct 2001 08:04:56 -0700; Do Not resonate the choke (at 2x the mains frequency with a parallel C) if you require poor transient V-regulation. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: ht; /archives//html/Amps/2001-10/msg00430.html (8,596 bytes)
9. [AMPS] Choke input PS question (score: 1): Author: kd5izi_tech@yahoo.com (Randall DuCharme); Date: Mon, 22 Oct 2001 08:07:55 -0700 (PDT); Thanks Peter, Sorry.... I hadn't gotten that email yet when I sent the above question(s). It did explain that fairly well. I'm searching the archives to see if I can find Mr. Rauch's tale that you me; /archives//html/Amps/2001-10/msg00431.html (9,344 bytes)
10. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 15:59:29 +0100; I'd say DON'T do it anyway. Of course Rich, you realise that you can't use a 3-500z as a variable load when testing the system, as 100 or 120Hz is below its cut off frequency!!!!!!! 73 Peter G3RZP --; /archives//html/Amps/2001-10/msg00432.html (8,588 bytes)
11. [AMPS] Choke input PS question (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Mon, 22 Oct 2001 08:19:53 -0700; Rich: The adverse qualities of the power supply choke can be alleviated by shunting it with some nichrome wire. 73, Colin K7FM -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@cont; /archives//html/Amps/2001-10/msg00433.html (8,292 bytes)
12. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 16:19:06 +0100; But you mustn't use too much nichrome wire....... 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.co; /archives//html/Amps/2001-10/msg00434.html (8,409 bytes)
13. [AMPS] Choke input PS question (score: 1): Author: 2@vc.net (2); Date: Mon, 22 Oct 2001 08:35:29 -0700; Not quite. When an old timer (W6SDM) told me about the unresonant choke problem, he explained that the transient regulation problem can't be seen on a garden-variety voltmeter because the needle ine; /archives//html/Amps/2001-10/msg00437.html (9,012 bytes)
14. [AMPS] Choke input PS question (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 22 Oct 2001 16:39:19 +0100; I'm not sure if that happens with a tuned choke (I don't like calling it 'resonant' because we've seen it had better not be!) but those spikes are why you need a good big capacitor on the output to k; /archives//html/Amps/2001-10/msg00439.html (9,142 bytes)
15. [AMPS] Choke input PS question (score: 1): Author: 2@vc.net (2); Date: Mon, 22 Oct 2001 12:00:14 -0700; Indeed - like about 5cm of #18 - which has c. 50milli-ohms. However, shorting the choke with #18 copper might work a bit better for 8281 supplies since it 50x more conductive. On the other hand, res; /archives//html/Amps/2001-10/msg00441.html (8,216 bytes)
16. [AMPS] Choke input PS question (score: 1): Author: 2@vc.net (2); Date: Mon, 22 Oct 2001 12:00:16 -0700; chortle cheerio, Peter - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: am; /archives//html/Amps/2001-10/msg00442.html (8,081 bytes)
17. [AMPS] Choke input PS question (score: 1): Author: 2@vc.net (2); Date: Mon, 22 Oct 2001 12:00:17 -0700; It doesn't. This is why Collins, Henry, Hughes, Continental, on and on use resonant choke filters. A capacitor on the output would have to humongous to correct this problem. Resonating capacitors ar; /archives//html/Amps/2001-10/msg00443.html (9,380 bytes)

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