Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Shunt\s+regulated\s+high\s+voltage\s+psu\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Shunt\s+regulated\s+high\s+voltage\s+psu\s*$/: 109 ]

Total 109 documents matching your query.

41. [AMPS] Shunt regulated high voltage psu (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 29 Jan 2002 21:18:50 +0000; Good grief, Tom! I certainly *hope* there is a difference. -- 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com/g3sek -- FAQ on WWW: htt; /archives//html/Amps/2002-01/msg00276.html (10,237 bytes)
42. [AMPS] Shunt regulated high voltage psu (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 29 Jan 2002 21:29:20 +0000; My remark about "cheap zeners" came from an earlier statement by Rich: It had nothing to do with the alleged quality of the semiconductors. Put it down to the "common language" barrier. If the well-k; /archives//html/Amps/2002-01/msg00277.html (12,721 bytes)
43. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 14:04:26 -0800; - No "help" needed if quality zeners are operated conservatively. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps S; /archives//html/Amps/2002-01/msg00278.html (9,507 bytes)
44. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 14:04:29 -0800; To: <amps@contesting.com> // Low screen-V tubes such as the 4cx800 (350V-sc.) suffer more from reverse screen current than tetrodes with handles. However, even 4cx5000As and 4cx10,000s occasionally; /archives//html/Amps/2002-01/msg00279.html (12,727 bytes)
45. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 14:04:28 -0800; A mixed bag. Inability to maintain constant V with <> I is the sticky wicket. cheers, Steve - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www; /archives//html/Amps/2002-01/msg00280.html (10,056 bytes)
46. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 14:04:24 -0800; I am one of two who do, Tom. Hughes Electronics reportedly uses low VHF Q conductor materials in their 100kW HF amplifier. - Do you still profess that the resistance of Ni-Cr alloy increases as freq; /archives//html/Amps/2002-01/msg00281.html (9,853 bytes)
47. [AMPS] Shunt regulated high voltage psu (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 29 Jan 2002 14:02:27 -0800; (write), is a function of only three variables: Avalanche voltage; junction construction; junction cross-section (die area). If one desires low Zz (dynamic impedance), it's easy to find in very larg; /archives//html/Amps/2002-01/msg00282.html (11,205 bytes)
48. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 14:28:31 -0800; Chortle To do the job at hand, a zener must exhibit a high dynamic resistance with only a small change in V. Otherwise it would not be able to maintain a constant V as the screen current varies. It; /archives//html/Amps/2002-01/msg00283.html (13,814 bytes)
49. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 14:37:41 -0800; If the delta V for one diode ia 2%, the delta V for 100 of them in series is 2% even though the regulated V is 100x higher. Good point, Steve. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, ww; /archives//html/Amps/2002-01/msg00285.html (12,091 bytes)
50. [AMPS] Shunt regulated high voltage psu (score: 1): Author: gdaught6@leland.stanford.edu (George T. Daughters); Date: Tue, 29 Jan 2002 14:40:15 -0800; < snip > No. That's a SMALL dynamic resistance. You want delta V to be small with a given delta I. Dynamic Resistance = (delta V)/(delta I) Good voltage regulation is "constant V as the ... current v; /archives//html/Amps/2002-01/msg00286.html (9,688 bytes)
51. [AMPS] Shunt regulated high voltage psu (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 29 Jan 2002 14:46:52 -0800; however, if you do the math, it comes out the same. The problem is that Zz, and thus regulation, is not held well by small-area junctions. The Zz of a small device might be 10-20-30 Ohms, so dynamic; /archives//html/Amps/2002-01/msg00287.html (12,402 bytes)
52. [AMPS] Shunt regulated high voltage psu (score: 1): Author: john@steampower.demon.co.uk (John Nelson); Date: Tue, 29 Jan 2002 23:05:07 -0000; screen regulator and a zener-string regulatior was too vast to be true with quality semiconductors. Oh dear: the troll is active again. Speaking as the person who some years ago spent a long time ma; /archives//html/Amps/2002-01/msg00288.html (10,444 bytes)
53. [AMPS] Shunt regulated high voltage psu (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 29 Jan 2002 23:27:20 +0000; A small change in V for a given change in I is characteristic of *low* resistance, not high. Check the device data sheets for the definition of dynamic resistance, or almost any electronics textbook.; /archives//html/Amps/2002-01/msg00289.html (9,981 bytes)
54. [AMPS] Shunt regulated high voltage psu (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Tue, 29 Jan 2002 18:12:24 -0600; "John Nelson" <john@steampower.demon.co.uk> wrote... Rerefences? URLs? Jim N6OTQ -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUE; /archives//html/Amps/2002-01/msg00290.html (9,708 bytes)
55. [AMPS] Shunt regulated high voltage psu (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 29 Jan 2002 19:34:46 -0500; Why would that be true, if you run nearly constant current through the diodes??? If the source voltage is at least twice the screen operating voltage, the maximum possible screen dissipation is equa; /archives//html/Amps/2002-01/msg00291.html (11,063 bytes)
56. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 19:26:26 -0800; Zener diode A can change it resistance by 5 to 1. Zener diode B can change its resistance by 100 to 1. Which one provides a wider range of regulation with current change? A 10?, 10W resistor allows; /archives//html/Amps/2002-01/msg00294.html (10,012 bytes)
57. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 19:26:28 -0800; Agreed - R. L. Measures, a.k.a. Rich..., 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/2002-01/msg00295.html (11,344 bytes)
58. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 19:26:30 -0800; John plays the Ad Hominem Card. What % screen voltage regulation did you measure with your zener shunt regulator? no doubt about that At what % of the max dissipation rating did you bias the zeners?; /archives//html/Amps/2002-01/msg00296.html (10,891 bytes)
59. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 19:26:31 -0800; So low dynamic resistance means a high ability to change resistance? - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amp; /archives//html/Amps/2002-01/msg00297.html (9,729 bytes)
60. [AMPS] Shunt regulated high voltage psu (score: 1): Author: 2@mail.vcnet.com (rich); Date: Tue, 29 Jan 2002 19:26:34 -0800; Bingo - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amp; /archives//html/Amps/2002-01/msg00298.html (10,830 bytes)

Current List: 41 - 60
Page: [1] [2] [3] [4] [5] [6]