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Total 13 documents matching your query.

1. [AMPS] PS diode equalizing (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 03 Jul 1999 08:43:42 -0700; What's the current view on equalizing caps and resistors across diodes in rectifier strings? The ARRL handbook says you should put a 0.01 mf capacitor and (I think) 1000 ohms per volt resistor across; /archives//html/Amps/1999-07/msg00019.html (7,942 bytes)
2. [AMPS] PS diode equalizing (score: 1): Author: qrotec@bright.net (QRO Technologies); Date: Sat, 3 Jul 1999 11:53:38 -0400; Vic, Your doing OK! Ray C. KB8VU QRO Tech capacitor recall a 1N5408's -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/1999-07/msg00020.html (8,956 bytes)
3. [AMPS] PS diode equalizing (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sat, 3 Jul 1999 12:53:21 -0400; Hi Vic, from 1996 ARRL Handbook, DIODES IN SERIES, page 11.9: "There used to be a general recommendation to place a resistor across each diode in the string to equalize PIV drops. With modern diodes,; /archives//html/Amps/1999-07/msg00021.html (9,535 bytes)
4. [AMPS] PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 3 Jul 1999 14:44:17 -0700; With 16 diodes per leg and 4kV out, each diode c. 1/4 of its rated piv. . I would be happy with a bit less safety factor, Bill Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- F; /archives//html/Amps/1999-07/msg00025.html (8,719 bytes)
5. [AMPS] PS diode equalizing (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sat, 3 Jul 1999 21:36:12 -0400; Yep, overkill - but 32 of 'em fit on a beautiful board I had available. Plus there's room for 32 more as the project grows!. --Original Message-- From: Rich Measures <measures@vc.net> To: Bill Colema; /archives//html/Amps/1999-07/msg00027.html (9,369 bytes)
6. [AMPS] PS diode equalizing (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Sun, 4 Jul 1999 10:03:00 +0200; The resistors and caps don't really force voltage sharing as the values are too high, however they do remove the high frequency transients caused when the diodes switch and reduce RFI from the rectif; /archives//html/Amps/1999-07/msg00031.html (9,360 bytes)
7. [AMPS] PS diode equalizing (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 4 Jul 1999 12:12:50 -0400; Hi Bill, I called Motorola, and no one there had any data to support this claim one way or another. It was all mostly rumor. When I finally reached a semiconductor engineer who actually was involved; /archives//html/Amps/1999-07/msg00038.html (9,972 bytes)
8. [AMPS] PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 4 Jul 1999 11:00:18 -0700; ? I contend that the statement "In fact, shunt resistors can actually create problems..." has nothing to do with resistor problems. I have seen situations where "equalizer resistors" caused potential; /archives//html/Amps/1999-07/msg00043.html (10,688 bytes)
9. [AMPS] PS diode equalizing (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 5 Jul 1999 09:48:49 +0100; I tend to go along with Tom here. Rich's example is fine but.......... 1. If you were applying 1800v reverse, then you'd use two diodes rated at 1kV each. For an 800 piv and a 1000piv diode in series; /archives//html/Amps/1999-07/msg00054.html (9,497 bytes)
10. [AMPS] PS diode equalizing (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 05 Jul 1999 07:33:06 -0700; 30-odd years ago, I worked at a BC station. We had a 5kw FM transmitter whose power supply contained boards made of many, many 400 piv diodes. They were paralled with (I think 470K) resistors. We los; /archives//html/Amps/1999-07/msg00056.html (9,265 bytes)
11. [AMPS] PS diode equalizing (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 5 Jul 1999 10:19:19 -0700; values, ? Manufacturers of encapsulated multi-diode stacks used to use equalizer resistors and capacitors. They apparently stopped the practice over 15 years ago. - later, Vic Rich... R. L. Measures; /archives//html/Amps/1999-07/msg00062.html (9,574 bytes)
12. [AMPS] PS diode equalizing (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 5 Jul 1999 18:23:24 +0100; --Original Message-- From: Vic Rosenthal <rakefet@rakefet.com> To: Peter Chadwick <Peter_Chadwick@mitel.com>; amps@contesting.com <amps@contesting.com> To: <amps@contesting.com> Date: 05 July 1999 15; /archives//html/Amps/1999-07/msg00064.html (10,471 bytes)
13. [AMPS] PS diode equalizing (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 6 Jul 1999 11:59:04 -0400; That's basically what the semiconductor engineer at Motorola told me also. He said the biggest problems was uneven reverse recovery times, even with diodes from the same source. 73, Tom W8JI w8ji@co; /archives//html/Amps/1999-07/msg00105.html (8,827 bytes)

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