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101. Re: [Amps] load capacitor ratings? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 30 Aug 2004 21:20:54 -0400; I failed to mention that the values I were mentioning earlier, in the designs I was using, were for a Pi tank circuit and not a Pi-L. Thus the load C would have seen a different load resistance of ab; /archives//html/Amps/2004-08/msg00462.html (7,387 bytes)
102. [Amps] Re: load capacitor ratings (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 30 Aug 2004 22:04:34 -0400; Vic and Roy, Yea, I caught that. I don't know why I mis-read what was said, I must have been thinking about a Pi tank or something when I wrote that. I sent in a correction which was in the last mail; /archives//html/Amps/2004-08/msg00463.html (7,251 bytes)
103. [Amps] AL-1500 pi network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 30 Aug 2004 22:44:14 -0400; Rob, It's hard to tell the exact rating of the transformer. He gives a weight of 32 pounds, but that's total weight including the coil. I just figured a core for an op the other day to fit an Alpha 7; /archives//html/Amps/2004-08/msg00464.html (10,480 bytes)
104. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 30 Aug 2004 23:18:03 -0400; If the tank coil(s) are under-sized, this will in turn effect the Q due to the skin effect raising the resistance of the conductor, especially in the higher frequencies. You are exactly correct on th; /archives//html/Amps/2004-08/msg00465.html (9,334 bytes)
105. [Amps] Re: load capacitor (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 31 Aug 2004 00:10:48 -0400; Hal, I'll bet it was because I was a manufacturer that he spoke to me. He was figuring on me ordering like 100+ capacitors at a time, which I eventually did. I started buying from Oceanstate Electron; /archives//html/Amps/2004-08/msg00467.html (7,528 bytes)
106. Re: [Amps] load capacitor ratings? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 31 Aug 2004 01:42:15 -0400; Rich, 1500 watts PEP on a 300 ohm load. Sqrt of 1500 X 300 = 670.8 Volts. 1500 v x 300 ohms = 450,000 and the sqrt of 450,000 = 670.8. On a 50 ohm load, 1500 watts PEP x 50 = 75,000 and the sqrt of 7; /archives//html/Amps/2004-08/msg00469.html (9,775 bytes)
107. Re: [Amps] load capacitor ratings? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 31 Aug 2004 01:52:19 -0400; Rich, This insulation material that they said was nylon, looked as if they dipped the stator assembly in it as a liquid and let it dry. It still gave enough clearance for the rotor plates to move fre; /archives//html/Amps/2004-08/msg00470.html (11,112 bytes)
108. Re: [Amps] load capacitor ratings? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 31 Aug 2004 02:07:46 -0400; Rich, Yep, your correct, I wasn't thinking about the differences in the readings. So in turn it would double the voltage values. Don't know why I was thinking that, must be getting senile? Will R. Me; /archives//html/Amps/2004-08/msg00472.html (11,633 bytes)
109. Re: [Amps] load capacitor ratings? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 31 Aug 2004 02:54:43 -0400; I wanted to take a look at OEP's variable inductor and see what it said on their website and in the catalog I have here. The website says they're using a glass-phenolic core. The printed catalog said; /archives//html/Amps/2004-08/msg00473.html (13,638 bytes)
110. [Amps] conductivity problem (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 09:35:42 -0400; Clive, I used to be a sales engineer for Pandjiris, Inc. out of St. Louis. We manufactured automated welding equipment and welding positioners. This is something we researched in depth as we had to u; /archives//html/Amps/2004-09/msg00005.html (11,117 bytes)
111. [Amps] OEP caps (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 09:49:41 -0400; I would assume that the glass epoxy was a cheaper alternative somehow. Most electrical will use the cheapest insulation to get the job done within ratings. I don't know how may the had made up, but t; /archives//html/Amps/2004-09/msg00006.html (7,610 bytes)
112. [Amps] A question! (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 15:21:22 -0400; Yep, Go to a local bearing and power transmission supply house. We have three large ones close to here, Motion Industries, Applied Technology, and Ohio Transmission & Pump. They can generally order a; /archives//html/Amps/2004-09/msg00017.html (8,248 bytes)
113. [Amps] Homeland Security (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 17:01:47 -0400; I received an e-mail today that might be of interest to some. A copy of it is below. Will Matney Quote; This Webinar is sponsored by Kenwood USA Corporation. For complete details and to *register* cl; /archives//html/Amps/2004-09/msg00022.html (9,130 bytes)
114. Re: [Amps] Homeland Security (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 18:03:45 -0400; Bill, I totally agree but you would be surprised on how many amateur manufacturers are involved in this. Thus, I sent this in which may interest some. Really, any amateur manufacturer deals with the; /archives//html/Amps/2004-09/msg00026.html (11,735 bytes)
115. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 01 Sep 2004 19:34:21 -0400; Rob. Aluminum has several design features that aren't as good as copper for a tank coil. Copper has better conducting values and will not get hot near as quick. Plus, soldering to aluminum isn't as e; /archives//html/Amps/2004-09/msg00030.html (10,270 bytes)
116. [Amps] Magnet wire ratings (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Thu, 02 Sep 2004 09:03:39 -0400; Somebody on the reflector wanted to know the voltage rating on magnet wire used in transformers-chokes a while back. I didn't have that info on the transformer webpage either so I researched it for i; /archives//html/Amps/2004-09/msg00039.html (7,989 bytes)
117. [Amps] Magnet wire ratings (Correction) (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Thu, 02 Sep 2004 11:49:43 -0400; I said the operating voltage, OV, should be "(X2)" and is not right. The operating voltage is the breakdown voltage, BDV, divided by two. OV / 2 = BDV. Sorry for that little blunder. Will Matney Some; /archives//html/Amps/2004-09/msg00050.html (7,154 bytes)
118. Re: [Amps] How do I determine Class (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Thu, 02 Sep 2004 12:07:55 -0400; Bill, I was reading about this a while back. If I recall, the spacing between the screen grid and the anode in power tetrodes help control secondary emission reaching the screen from the anode. If yo; /archives//html/Amps/2004-09/msg00051.html (10,469 bytes)
119. [Amps] AL-1500 pi-network capabilities (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Fri, 03 Sep 2004 00:53:15 -0400; Rob, I almost didn't catch your question below about the low frequency coil in tank circuits. Yes, the type of core used on the coil can cause a coil to heat up. Preferably, this should be a true air; /archives//html/Amps/2004-09/msg00056.html (10,097 bytes)
120. [Amps] Question about low frequency tank coil forms? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Fri, 03 Sep 2004 10:55:12 -0400; After answering an earlier question to Rob about cores in low frequency tank coils, something hit me. What if the core had a series of holes close together about 1/2" in diameter all around its circu; /archives//html/Amps/2004-09/msg00060.html (7,767 bytes)

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