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1. [Amps] RMS power - who cares? (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Tue, 12 Nov 2002 13:05:34 EST; The recent discussion about RMS power has left one general impression on me. Just about everyone is concerntrating on words, and some trivial definitions, without really looking at the basic issues w; /archives//html/Amps/2002-11/msg00190.html (6,839 bytes)
2. [Amps] Hi-Q RF Coils (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Thu, 28 Nov 2002 14:28:57 EST; I am trying to find the best way to build RF inductors in the range of 5-50 uH and the lowest possible losses. They are for use at KW+ power levels, such as might be found in tank circuits and antenn; /archives//html/Amps/2002-11/msg00389.html (7,417 bytes)
3. [Amps] P600M diodes in HT supplies (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Fri, 3 May 2002 15:31:02 EDT; What reasoning leads you to believe that these diodes (fast recovery) do or don't need 'equalizing' R's or C's any more or less than standard recovery diodes. I have always been skeptical of this any; /archives//html/Amps/2002-05/msg00022.html (7,979 bytes)
4. [Amps] Rectifier diode strings (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Sun, 5 May 2002 09:16:21 EDT; Well, so far the only significant reason that has been offered, by Steve K., is that for fast transients, the rectifier string "appears to be a string of small capacitors." True enough, and indeed sm; /archives//html/Amps/2002-05/msg00029.html (9,519 bytes)
5. [Amps] Basic transformer theory (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Tue, 7 May 2002 12:05:57 EDT; Sorry - none of you has it right. Here is how it goes: At no load, the primary sits there drawing a current which is V/X, where X is the inductive reactance of the primary. This current is commonly r; /archives//html/Amps/2002-05/msg00071.html (8,563 bytes)
6. Fwd: [Amps] Basic transformer theory (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Wed, 8 May 2002 08:25:42 EDT; -- StripMime Report -- processed MIME parts -- multipart/mixed text/plain (text body -- kept) message/rfc822 --; /archives//html/Amps/2002-05/msg00079.html (6,628 bytes)
7. [Amps] Silver plating (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Sat, 11 May 2002 13:23:33 EDT; While doing a major shop cleanup, I came across an old container of KoolAmp wipe-on silver plating powder. I recalled seeing a note about it recently, recommending it as a protective (?) coating on c; /archives//html/Amps/2002-05/msg00128.html (8,175 bytes)
8. [Amps] Fwd: High power attenuators (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Sat, 11 May 2002 13:37:40 EDT; This is a re-routing of the original message which was accidentally launched into outer space the first time. -- StripMime Report -- processed MIME parts -- multipart/mixed multipart/alternative text; /archives//html/Amps/2002-05/msg00129.html (6,402 bytes)
9. [Amps] High power attenuators (HPA's) (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Sat, 11 May 2002 18:19:09 EDT; I have some interesting info to share with other engineering minded hams. I have long been plagued by the problem of trying to make accurate measurments at high power levels. A simple example is the; /archives//html/Amps/2002-05/msg00132.html (8,514 bytes)
10. [Amps] High power attenuators (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Wed, 15 May 2002 19:54:07 EDT; Eric K8LV -- StripMime Report -- processed MIME parts -- multipart/alternative text/plain (text body -- kept) text/html --; /archives//html/Amps/2002-05/msg00227.html (6,609 bytes)
11. [Amps] Voodoo harmonics at K1TTT (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Sat, 18 May 2002 13:09:25 EDT; Dave: (No ill intentions in the title - just thought it sounded cool.) It is a little difficult to analyze problems by remote control when you cannot see, feel and touch EVERYTHING involved. However,; /archives//html/Amps/2002-05/msg00294.html (7,200 bytes)
12. [Amps] Resistor voltage ratings (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Thu, 23 May 2002 11:42:55 EDT; Can any one tell me what is the origin of voltage ratings on ordinary resistors (i.e. film and composition types.) In every case where I had to design a high voltage divider, the dominant factor was; /archives//html/Amps/2002-05/msg00387.html (8,098 bytes)
13. [Amps] Mica capacitors - friend or foe? (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Fri, 24 May 2002 07:59:50 EDT; I still question this assertion that mica degrades at HF. According to the best information I have ( which I will be glad to post if anyone cares) mica has a loss factor of 2x10^-4 at frequencies up; /archives//html/Amps/2002-05/msg00409.html (8,617 bytes)
14. [Amps] Mica capacitors - friend or foe? (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Fri, 24 May 2002 10:49:05 EDT; Todd: I have a number of tricks that I have developed over the years for building up capacitors. Perhaps I will reveal some of them soon - unfortunately some of my data is proprietary since I am in t; /archives//html/Amps/2002-05/msg00410.html (8,877 bytes)
15. [Amps] Mica capacitors - friend or foe? (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Fri, 24 May 2002 14:15:38 EDT; Oops - I didn't notice that it was addressed to me directly. He was having trouble with temperature drift in his homebrew capacitor. Eric K8LV -- StripMime Report -- processed MIME parts -- multipart; /archives//html/Amps/2002-05/msg00418.html (7,592 bytes)
16. [Amps] Mica capacitors - friend or foe? (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Fri, 24 May 2002 14:36:07 EDT; Unfortunately that's not the main issue. What's relavent is how they perform relative to other types (e.g. ceramic). You expressed the opinion that they degrade more than other caps as f increases, a; /archives//html/Amps/2002-05/msg00419.html (8,528 bytes)
17. [Amps] Mica capacitors - Round 2 (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Sat, 25 May 2002 10:12:57 EDT; Thanks to all who finally came forward with some data to look at. The bad news is that the data is somewhat confusing. I am inherently suspicious of data that does not 'compute'. This is the result o; /archives//html/Amps/2002-05/msg00426.html (9,680 bytes)
18. [Amps] 811 vs SV-572 (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Tue, 23 Apr 2002 09:40:27 EDT; Does anyone have any REAL information which shows any significant difference between the 811A and the SV-572. I have looked at the curves for both tubes and the curves quack like the same duck to me.; /archives//html/Amps/2002-04/msg00530.html (6,620 bytes)
19. [Amps] SV572 vs 811A (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Fri, 26 Apr 2002 11:15:43 EDT; Thanks to everyone who responded to my original request. As I suspected, most of the information received was not very useful, because it was too general. However, John K5PRO was kind enought o send; /archives//html/Amps/2002-04/msg00563.html (9,743 bytes)
20. [Amps] (no subject) (score: 1): Author: EVonvaltie@aol.com (EVonvaltie@aol.com); Date: Wed, 6 Mar 2002 17:13:30 EST; --part1_129.d936254.29b7ee8a_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Unsubscribe. --part1_129.d936254.29b7ee8a_boundary Content-Type: text/html; charset=; /archives//html/Amps/2002-03/msg00119.html (6,439 bytes)

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