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321. Re: [Amps] TL922A (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 03 Apr 2006 09:21:28 -0400; I agree that is about right. It was rated at 2000 watts PEP plate input and with 60%or 65% efficiency you get 1200 or 1300 watts output. The initial limitations of power output are in the power suppl; /archives//html/Amps/2006-04/msg00021.html (10,016 bytes)
322. Re: [Amps] tubes (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 04 Apr 2006 09:56:26 -0400; If you have a lot of drive you can connect the control grid to the cathode, ground the screen grid and run grounded grid. The linearity will put high mu triodes to shame since there will be very litt; /archives//html/Amps/2006-04/msg00042.html (9,785 bytes)
323. Re: [Amps] tubes (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 04 Apr 2006 14:50:25 -0400; There are two grids. One connected to the cathode and one to ground. The screen grid becomes the control grid. But the geometry of the 4cx250 is such that electrons have a tough time hitting the scre; /archives//html/Amps/2006-04/msg00058.html (11,288 bytes)
324. Re: [Amps] 4CX250B and data sheets in general. (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Tue, 04 Apr 2006 23:53:32 -0400; I was thinking about that one too. I suspect that the spec was for use in portable SSB Military transceivers such as the PRC-47 where there is little concern with IMD products. Who cares in the jungl; /archives//html/Amps/2006-04/msg00073.html (8,288 bytes)
325. Re: [Amps] small signal diodes (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 05 Apr 2006 15:28:37 -0400; Mouser has them for 13 cents each. 73 Bill wa4lav _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-04/msg00082.html (8,557 bytes)
326. Re: [Amps] NON-CONTACT laser thermometer (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 11 Apr 2006 10:07:06 -0400; These will not work very well with reflective or transparent surfaces. Thus, the measurement of glass envelopes or shiny aluminum surfaces in not possible. By the way, the laser is simply a pointing; /archives//html/Amps/2006-04/msg00173.html (8,629 bytes)
327. Re: [Amps] working backwards to setup tank (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 18 Apr 2006 18:16:31 -0400; That reminds me about an interesting incident with a MFJ antenna analyzer. Our club had just put up an new 2 meter repeater antenna. They had made some adjustments to it in one of the member's back y; /archives//html/Amps/2006-04/msg00290.html (10,555 bytes)
328. Re: [Amps] Strange power supply (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 20 Apr 2006 15:21:05 -0400; It could be either 60 or 120 Hz. What is usually called hum are the harmonics, not the fundamentals, since our hearing is much more sensitive to the higher frequencies, 400 to 1000 Hz or so. 60 Hz an; /archives//html/Amps/2006-04/msg00317.html (10,520 bytes)
329. [Amps] The Hamvention (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Fri, 28 Apr 2006 11:41:14 -0400; It seems that there is a lot of selling activity a month or two before the Dayton Hamvention. I suspect that folks are trying to raise funds to get cool stuff there. I would like to get compile a lis; /archives//html/Amps/2006-04/msg00421.html (6,972 bytes)
330. [Amps] Fwd: The Hamvention (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 03 May 2006 12:01:40 -0400; I have only gotten two replies. Anyone else interested in the Dayton Hamvention List? I will only be sending the list to those that are interested so that the information will not be public. 73 Bill; /archives//html/Amps/2006-05/msg00012.html (7,700 bytes)
331. [Amps] Fwd: The Hamvention (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 11 May 2006 16:59:51 -0400; I have had few replies. If you want on the list or a copy please email me right away. I am combining the Boatanchor and AMPs list since the list is so short. 73 Bill wa4lav __________________________; /archives//html/Amps/2006-05/msg00081.html (7,400 bytes)
332. Re: [Amps] RE : who needs it? Henry 8K (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 25 May 2006 10:57:38 -0400; But does anyone other than a complete nut exceed those speeds by 50%? 100%? 200%? Above about 50 MPH the power required is proportional to the speed cubed! 100% increase ,say 50 to 100 MPH ,requires; /archives//html/Amps/2006-05/msg00353.html (10,538 bytes)
333. Re: [Amps] 813's (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 29 May 2006 09:52:49 -0400; I may have an idea where the confusion comes from. RCA made two different 813's one with a graphite plate and the newer version with a metal plate. There may be other internal differences between the; /archives//html/Amps/2006-05/msg00486.html (8,529 bytes)
334. [Amps] resonance (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 05 Jun 2006 09:51:26 -0400; Maybe it is time to change the thread. Passive Resonance is a frequency selective means of storing oscillating energy. It occurs when energy oscillates back and forth between two complementary energy; /archives//html/Amps/2006-06/msg00116.html (11,698 bytes)
335. Re: [Amps] resonance (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 05 Jun 2006 11:10:24 -0400; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-06/msg00121.html (11,760 bytes)
336. Re: [Amps] re :NIB HeathKit Amp (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Mon, 26 Jun 2006 10:16:04 -0400; I saw an unassembled SB220 amplifier at Dayton one year. It had fallen out the back of the vendor's pick-up truck somewhere on I-75. 73 Bill wa4lav _______________________________________________ Amp; /archives//html/Amps/2006-06/msg00427.html (8,435 bytes)
337. [Amps] Q and Resonance (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 28 Jun 2006 09:45:15 -0400; This is a bit off the topic of "AMPS" but is related to building your own equipment. I had been teaching ham radio classes for many years. Can't remember when I started. I have received the new ARRL; /archives//html/Amps/2006-06/msg00556.html (7,586 bytes)
338. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1): Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>; Date: Sun, 02 Jul 2006 12:08:07 -0400; Reading the emails I have not seen one that states the obvious. The 4-250A is electrically identical to the 4-400A except for plate dissipation. They just added fins to the 4-250A to make the 4-400A.; /archives//html/Amps/2006-07/msg00057.html (9,866 bytes)
339. Re: [Amps] New SGC Mini Lini Uses Class E Technology (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 05 Jul 2006 12:20:33 -0400; The last thing I saw on this amplifier was a year ago. I assume they decided not to manufacture it. I certainly had my reservations about the product, but it would been nice to have been proven wrong; /archives//html/Amps/2006-07/msg00224.html (7,207 bytes)
340. Re: [Amps] Hi Mu correction (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Wed, 19 Jul 2006 10:49:21 -0400; Lower mu tubes have wider spacing between the grid wires allowing more electrons to slip by each second for the same bias voltage. It also reduces the effective control the grid voltage has over the; /archives//html/Amps/2006-07/msg00634.html (8,615 bytes)

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