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1. [AMPS] Power Supply Question (score: 1): Author: jhill@visi.com (jhill@visi.com); Date: Wed, 12 Jul 2000 14:26:14 -0500 (CDT); Greetings; I have always assmed that if it's a Henry, it runs forever, and to specification. That having been said... I own a 3K Classic-X of the 8877 vintage. Two nights ago, I got on and one of the; /archives//html/Amps/2000-07/msg00067.html (8,741 bytes)
2. [AMPS] Power Supply Question (score: 1): Author: plantin@tcomlp.com (Bruce Plantin); Date: Wed, 12 Jul 2000 16:05:10 -0400; John, I'm surprised you B+ is not higher than normal. With the resonate choke filter that far off, your filter should act more as a capacitor input filter giving you a much higher voltage with no loa; /archives//html/Amps/2000-07/msg00068.html (7,437 bytes)
3. [AMPS] Power Supply Question (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 12 Jul 2000 16:27:23 -0500; I would venture to say that 85-90% of Henry failures are the choke. My guess is that turns are shorted internally. Call Henry to see what the resistance should be. (No Guru here...I stand in awe of; /archives//html/Amps/2000-07/msg00069.html (8,484 bytes)
4. [AMPS] Power Supply Question (score: 1): Author: ezed@aloha.net (Edward Pagaduan); Date: Wed, 12 Jul 2000 19:38:38 -1000; Don't overlook the other supplies that bias the tube{s}. Thoroughly check them out also. Problem might be more minor. Aloha & 73, Ed Pagaduan -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submiss; /archives//html/Amps/2000-07/msg00072.html (10,051 bytes)
5. [AMPS] Power Supply Question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 13 Jul 2000 08:20:43 -0400; <italic><color><param>0000,0000,0000</param>> Don't overlook the other supplies that bias the tube{s}. Thoroughly check </italic></color>I'll vote for that! <italic><color><param>0000,0000,0000</para; /archives//html/Amps/2000-07/msg00073.html (10,298 bytes)
6. [AMPS] Power Supply Question (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 13 Jul 2000 13:29:55 +0100; Too right!!! You NEVER EVER, under any circumsatnces, want that choke resonant. It must be resonant above the ripple frequency or it looks like a capacitor. Although we talk about 'resonant choke' or; /archives//html/Amps/2000-07/msg00074.html (7,388 bytes)
7. [AMPS] Power supply question (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 22 May 1999 09:49:29 -0700; I am planning the power supply for my amp. One problem is that I have a 115v blower (draws 1 amp) and a 115v filament transformer (about 1.3 amps), and I'm possibly going to move overseas where only; /archives//html/Amps/1999-05/msg00282.html (7,517 bytes)
8. [AMPS] Power supply question (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 22 May 1999 20:12:47 -0700; thinking other half. The ? Sounds feasable. Since cathode emissive life varies as (e2/e1)^23.4, a rheostat in the fil. transformer pri. would be nice since electric-mains voltage regulation in some; /archives//html/Amps/1999-05/msg00290.html (7,621 bytes)
9. [Amps] power supply question (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Sun, 4 Apr 2004 04:41:33 -0400; I've been running a power supply at 4800 volts and am thinking of going to the next tap which will yield 5600 VDC. The capacitive input filter is sixteen 2400 MFD 450 VDC computer grade caps (150 MFD; /archives//html/Amps/2004-04/msg00024.html (6,509 bytes)
10. Re: [Amps] power supply question (score: 1): Author: Gudguyham@aol.com; Date: Sun, 4 Apr 2004 10:35:09 EDT; HI Ken, I would say that you are still way in the comfort zone at 7200 volt capacity. Go for it! What tube are yo running? 73 Louie _______________________________________________ Amps mailing list A; /archives//html/Amps/2004-04/msg00027.html (7,343 bytes)
11. Re: [Amps] power supply question (score: 1): Author: "Steve Eldridge" <g8izy@eurobell.co.uk>; Date: Sun, 4 Apr 2004 17:47:18 +0100; going to grade caps comfort Wow! You are storing an awesome amount of energy in that amount of C at that voltage! Steve G8IZY _______________________________________________ Amps mailing list Amps@co; /archives//html/Amps/2004-04/msg00028.html (7,696 bytes)
12. Re: [Amps] power supply question (score: 1): Author: Dennis12Amplify@aol.com; Date: Tue, 6 Apr 2004 17:14:07 EDT; Ken, That depends on the 'leakage' of each individual capacitor. Since they should all be 'well formed' by now it would be a good idea to check the voltage across each of the 16 series connected capa; /archives//html/Amps/2004-04/msg00049.html (7,339 bytes)
13. [Amps] Power supply question (score: 1): Author: Mike Saculla <fqm@msn.com>; Date: Sat, 11 Apr 2009 13:28:53 -0700; With your basic FWD circuit essentially 2 capacitors, or 2 banks of capacitors, get alternately charged by a single transformer by 2 diode strings. The entire cap banks is then charged at a rate of 6; /archives//html/Amps/2009-04/msg00131.html (7,271 bytes)
14. Re: [Amps] Power supply question (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Sun, 12 Apr 2009 09:28:50 +0300; 4X1AT, sadly an SK by now, who was the Israeli Peter Dahl, designed for me a PS transformer with 6 separate secondaries, each one producing 400VDC after rectification. The six secondaries, each with; /archives//html/Amps/2009-04/msg00137.html (9,328 bytes)
15. Re: [Amps] Power supply question (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sun, 12 Apr 2009 03:01:39 -0700; ORIGINAL MESSAGE: REPLY: I think this is incorrect. it is true the voltage across each cap can not fall below the individual supply voltage, but it can go above it. Equalization resistors are still n; /archives//html/Amps/2009-04/msg00139.html (7,339 bytes)
16. Re: [Amps] Power supply question (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Sun, 12 Apr 2009 17:28:26 +0300; ..actually, with the usual voltage dividers across the output the voltage goes down quite fast for small overvoltages. Anyhow, a high value resistor, needing to draw 1 or 2 milliamps, is not a bleede; /archives//html/Amps/2009-04/msg00140.html (8,494 bytes)
17. Re: [Amps] Power supply question (score: 1): Author: "Jim Tonne" <Tonne@Comcast.net>; Date: Sun, 12 Apr 2009 13:59:25 -0400; Alex wrote in part: What a beautiful candidate for a pulse-width modulator for AM or Kahn-method SSB! That is precisely what the 500 kW shortwave transmitters by Continental do. 48 separate 700 volt; /archives//html/Amps/2009-04/msg00142.html (7,709 bytes)
18. Re: [Amps] Power Supply Question (score: 1): Author: Mike Saculla <fqm@msn.com>; Date: Tue, 14 Apr 2009 19:28:12 -0700; Thanks to all who responded to this thread. Though this scheme does work, it doesn't produce the same results. I didn't do the math the first time around. My two xfmrs are 1100 VAC. If I series the s; /archives//html/Amps/2009-04/msg00153.html (7,900 bytes)
19. Re: [Amps] Power Supply Question (score: 1): Author: "Rex Lint" <rex@lint.mv.com>; Date: Wed, 15 Apr 2009 12:18:13 -0400; and run a FWD ...Or you could run each secondary to its own FWD then put the two doublers series... -Rex K1HI Rex Lint Merrimack, NH Thanks to all who responded to this thread. Though; /archives//html/Amps/2009-04/msg00155.html (9,115 bytes)
20. Re: [Amps] Power Supply Question (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Wed, 15 Apr 2009 09:44:44 -0700; ORIGINAL MESSAGE: REPLY: You need to be careful when putting the secondaries in series with the primaries in parallel. Depending on how the rectifier part is wired you might exceed the voltage rating; /archives//html/Amps/2009-04/msg00157.html (8,029 bytes)

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