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141. Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ? (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 01 Jan 2004 21:48:14 -0500; You can see from the entire expansion that all three of the effects are there. And one of the most interesting one is the cross modulation term. Here you can see that the amplitude of one signal affe; /archives//html/Amps/2004-01/msg00013.html (13,761 bytes)
142. Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ? (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 01 Jan 2004 21:57:09 -0500; You know this misconception probably has come from the trig identity generally used to expand (Cos A + Cos B)^3. Which is the same one I use. However, it could be done with different identities. Thes; /archives//html/Amps/2004-01/msg00014.html (15,267 bytes)
143. Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ? (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 01 Jan 2004 22:10:14 -0500; Sorry that I can't keep this discussion up tonight. I have work to do and then need to go to bed. Got some sort of bug last night, even though I did get my flu shot this year. Happy New Year to all.; /archives//html/Amps/2004-01/msg00015.html (8,962 bytes)
144. [Amps] Tube tester (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Mon, 05 Jan 2004 23:20:17 -0500; Well, I fired up my HB tube tester and checked a new 4CX250B which came just as expected and a NEW 4-1000A. It is not quite finished but this is very promising. It runs off 12 volts too. I can take i; /archives//html/Amps/2004-01/msg00063.html (7,260 bytes)
145. [Amps] Re: FW: How are IMds created (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 07 Jan 2004 18:53:13 -0500; You are referring to models that are determined by empirical data. There you can't separate the effects of second order and third order distortion. The math ( I don't know if you looked at it or not); /archives//html/Amps/2004-01/msg00085.html (16,999 bytes)
146. Re: [Amps] 9913 cable (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 10 Feb 2004 12:17:26 -0500; I see you are using a tuner. What was the SWR after the tuner. Having 1:1 into the tuner does not count. 9913 should easily handle 10 KW. I can run 2.5 KW into a dummy load thru RG58 (perfect match).; /archives//html/Amps/2004-02/msg00066.html (8,578 bytes)
147. Re: [Amps] A CALL TO ARMS ! (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 12 Feb 2004 09:23:52 -0500; The commissioners are scrambling to put this into effect before the next election to assure their future employment by the Utility companies. BPL will allow the power company to get into the telephon; /archives//html/Amps/2004-02/msg00090.html (9,798 bytes)
148. [Amps] 701A Pulse tube (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Fri, 09 Apr 2004 15:48:21 -0400; I need a data sheet on a 701A tetrode pulse hard modulator tube. I am playing with my transmitting tube tester and need the filament voltage and current specs and a set of characteristic curves for t; /archives//html/Amps/2004-04/msg00065.html (7,346 bytes)
149. Re: [Amps] filament supply options (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 26 Apr 2004 09:40:38 -0400; Since most all high current 5 volt DC power supplies have a positive output, you may be one step ahead. Often the cathode needs to be made slightly positive to reduce idling current and your effectiv; /archives//html/Amps/2004-04/msg00214.html (9,915 bytes)
150. Re: [Amps] filament supply options (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 26 Apr 2004 09:52:33 -0400; This reminded me of something. Sometimes while listening to your own signal (CW) in your shack you may notice some hum. This may not be real. What happens (QRP Guys notice this a lot when using direc; /archives//html/Amps/2004-04/msg00218.html (10,179 bytes)
151. Re: Re: [Amps] 4-1000A in Passive grid-driven use? (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Fri, 30 Apr 2004 09:32:15 -0400; I don't know if anyone has actually made a cathode driven biased 4-1000A AB1 amplifier but it should be very low in distortion compared to either zero bias grounded grid or common cathode operation.; /archives//html/Amps/2004-05/msg00003.html (9,197 bytes)
152. Re: [Amps] 3kv variable one amp PS (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 05 May 2004 09:41:35 -0400; I have often purchased these kind of things for $1 at university auctions. You have to realize that the auctions are a way of them getting rid of stuff that would other wise cost them a great deal of; /archives//html/Amps/2004-05/msg00051.html (9,008 bytes)
153. [Amps] List (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 06 May 2004 09:30:53 -0400; I am planning to bring my tx tube tester ( if I don't blow it up first) to Dayton to check tubes there. So far I have been able to test: 4x150 thru 4cx350 with pins and bayonet bases. I don't have a; /archives//html/Amps/2004-05/msg00060.html (8,131 bytes)
154. Re: [Amps] List (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Fri, 07 May 2004 13:14:29 -0400; Any of you have a data sheet (specs and curves) for a 8877/ 3CX1500A7 tube that you could scan and attach to an email? I can't seem to find one just now. And I need to make an adapter socket and dete; /archives//html/Amps/2004-05/msg00082.html (7,087 bytes)
155. [Amps] List (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Sat, 08 May 2004 01:15:10 -0400; Thanks for all the replies. I really appreciate your help. Hope to see you in Dayton. 73 Bill wa4lav Any of you have a data sheet (specs and curves) for a 8877/ 3CX1500A7 tube that you could scan and; /archives//html/Amps/2004-05/msg00091.html (7,371 bytes)
156. Re: [Amps] E-bay 12 tube 3-500Z deck (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Sat, 22 May 2004 19:24:45 -0400; Darn CBers will do just about anything. Or buy just about anything. The price is already over $100 per tube. It is only good for parts. 73 Bill wa4lav Wondering if anyone has seen the 12 tube 3-500Z; /archives//html/Amps/2004-05/msg00205.html (8,447 bytes)
157. Re: [Amps] Note on paralelling transformers (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Sat, 22 May 2004 19:31:17 -0400; I have a 5KW Henry Radio RF generator (20 meter transmitter?) in the garage. It has two plate supply transformers in parallel. The 3KW version only has one o f these transformers. To check secondarys; /archives//html/Amps/2004-05/msg00206.html (9,317 bytes)
158. RE: [Amps] Interesting item on eBay web site item#5700291025:AMPLIFIER 12 TUBER (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 25 May 2004 09:35:07 -0400; I think it is a close relative of Bird Watts. 73 Bill wa4lav At 05:42 PM 5/24/2004 -0400, Mike McCarthy, W1NR wrote: What is a "Gammer Match"? Mike, W1NR --Original Message-- From: amps-bounces@conte; /archives//html/Amps/2004-05/msg00226.html (10,183 bytes)
159. Re: [Amps] What to do with tubeless sweep tube FL2000 ? (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 28 Jun 2004 09:16:03 -0400; Maybe go to (4) 837's or modified 1625's. Not as much power ( they were really pushing the sweep tubes anyway). Look at the LA-400 amplifier made by P&H on bama.sbc.edu. ( no www). 1200 volts is just; /archives//html/Amps/2004-06/msg00135.html (10,128 bytes)
160. Re: [Amps] What to do with tubeless sweep tube FL2000 ? (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 28 Jun 2004 11:42:27 -0400; In fact you could bias the grids for AB1 and cathode feed (4) 4x150A or 4cx250b and get extremely low distortion due to the very low grid current drawn. But you will need bias supplies. And reduce fi; /archives//html/Amps/2004-06/msg00136.html (9,178 bytes)

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