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81. [AMPS] Re: B&W PT-2500 (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 3 Apr 1999 12:51:28 -0600; Brad, "Hello: A friend of mine has one of the first manufactured PT2500 Amplifiers manufactured by B&W. He would like to know if there were any major changes made in the power supply. He is not sure; /archives//html/Amps/1999-04/msg00048.html (7,382 bytes)
82. [AMPS] Re: QRO Pwr Sup Question (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 3 Apr 1999 16:11:04 -0600; George, pertaining to: someone elses earlier project. I have the power supply built, but the power transformer I used was designed for 220 VAC nominal rather than the 240 (plus) that I have at my out; /archives//html/Amps/1999-04/msg00052.html (7,403 bytes)
83. [AMPS] Re: cathode driven questions (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 11 Apr 1999 09:49:52 -0500; HI Vic; the cornvention is now in your back yard, instead of mine :-) Concerning: In planning my 2 x 3-500z gg amp, I've been looking at schematics of similar units, and there are a couple of questio; /archives//html/Amps/1999-04/msg00227.html (7,942 bytes)
84. [AMPS] Re: full break in (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 16 Apr 1999 17:43:12 -0500; Howdy, I have been using PINs at 1500 watts for the past 14 years with the QSK-1500 unit. No problems. Absolutely silent. Probably 50 million operations--used hard duty everyday. 73, K6XK Iowa outbac; /archives//html/Amps/1999-04/msg00316.html (7,238 bytes)
85. [AMPS] Re: QRO QSK (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 17 Apr 1999 12:20:42 -0500; provide a drawing?<<<< Mike, The full skinny is in January, 1985 Ham Radio, beginning on page 82: "High Power RF Switching With PIN Diodes" by J. R. Sheller, PhD, KN8Z. So far, I think this is the '; /archives//html/Amps/1999-04/msg00323.html (7,630 bytes)
86. [AMPS] Re: QRO QSK (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 17 Apr 1999 12:34:06 -0500; Did I offend the dentists or the post hole diggers? K6XK -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Pro; /archives//html/Amps/1999-04/msg00324.html (7,303 bytes)
87. [AMPS] Re: QRO QSK (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 17 Apr 1999 12:37:34 -0500; Roy, Is he the designer of the QSK 1500? Yes, I'm pretty sure. Roy K6XK -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@con; /archives//html/Amps/1999-04/msg00325.html (7,336 bytes)
88. [AMPS] Old Time Amidon Flyer (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 17 Apr 1999 12:48:51 -0500; I was pleased today to find in my P. O. Box the same informative, catalog/info/data sheet of long ago from Amidon. Plus some added goodies as well. www.amidon-inductive.com Just FYI, Roy K6XK -- FAQ; /archives//html/Amps/1999-04/msg00326.html (6,750 bytes)
89. [AMPS] Re: full break in (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 18 Apr 1999 09:14:00 -0500; what recommendations you might have for what to use & where to buy them etc<<<<< John, I think the QSK-1500 unit by DEO is still the best way to go. They are still available at hamfests and flea mar; /archives//html/Amps/1999-04/msg00335.html (7,755 bytes)
90. [AMPS] Re: full break-in (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 18 Apr 1999 14:40:08 -0500; Re: "The 2M operations spec is guaranteed at full ratings. How many Carl, I have encountered a few. But, I never learned how much operating they really did everyday like I do with PIN diodes. Besides; /archives//html/Amps/1999-04/msg00341.html (7,484 bytes)
91. [AMPS] Re: 30L1 Problem (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 30 Apr 1999 08:00:33 -0500; Hello, The thought came to mind that the amp may use a padder cap switched in parallel with the plate tuning cap or loading cap for 80M. If so, that cap may be defective, or not being switched in pro; /archives//html/Amps/1999-04/msg00458.html (6,406 bytes)
92. [AMPS] Tuned Input Circuit for Clipperton L (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 10 Mar 1999 16:03:56 -0600; What are the tubes, how many and is it GG? Roy K6XK --Original Message-- From: Steve Iezzi <siezzi@aeronix.com> To: amps@contesting.com <amps@contesting.com> To: <amps@contesting.com> Date: Wednesday; /archives//html/Amps/1999-03/msg00220.html (7,851 bytes)
93. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 11 Mar 1999 14:28:38 -0600; Steve, Assuming total cath Z = 100-ohms, Q = 2 Shunt capacity reduces C values somewhat Band C1 C2 L from predicted 160 3300 2520 4.20 80 1700 1350 2.26 40 900 680 1.14 20 440 330 0.56 15 300 220 0.3; /archives//html/Amps/1999-03/msg00235.html (8,898 bytes)
94. [AMPS] Re: Clipperton Tuned Inputs... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 12 Mar 1999 08:44:47 -0600; Steve, My advice from experience is to go for the big compression trimmers. It is a joy to adjust them for unity SWR with no hair pulling! And as mentioned here by others, I too prefer powdered iron; /archives//html/Amps/1999-03/msg00250.html (6,780 bytes)
95. [AMPS] Re: Solenoid Plate Chokes (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 12 Mar 1999 13:56:39 -0600; Hello, A trick I learned for testing them another, reassuring way is to mount them into position, with the "bottom" grounded. Then dip the tank's resonant freq. both with and without the "top" connec; /archives//html/Amps/1999-03/msg00260.html (7,283 bytes)
96. [AMPS] Plate Solenoid Chokes (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sat, 13 Mar 1999 13:40:21 -0600; Some general stuff about xmitting chokes: First, like with cholesterol, there are two kinds of self resonances--good and bad. The good resonance is the parallel and the bad is the series. In fact, fo; /archives//html/Amps/1999-03/msg00271.html (8,492 bytes)
97. [AMPS] Re: Solenoid Chokes (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 14 Mar 1999 08:44:36 -0600; A question I have is : Is there a problem with too much of a good thing? I wind my chokes so that no resonances fall within a desired operating frequency. The belief is that it contributes to stabili; /archives//html/Amps/1999-03/msg00282.html (9,037 bytes)
98. [AMPS] Output power 8877 (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 14 Mar 1999 13:59:38 -0600; core. Powdered iron is appropriate. The toroid core's dimensions for legal-limit power level is that of Amidon's T-400-A, which is 4-inches by 1-inch. I have used this core on 160M, 80M and 40M with; /archives//html/Amps/1999-03/msg00286.html (9,182 bytes)
99. [AMPS] Re: IT WORKS!!! (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 14 Mar 1999 15:53:58 -0600; ...OR...IT'S ALIVE, IT'S ALIVE!!! Congrats. and thanks for the info. K6XK -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@c; /archives//html/Amps/1999-03/msg00287.html (6,508 bytes)
100. [AMPS] Output power 8877 (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Mon, 15 Mar 1999 07:20:26 -0600; Dave, I'm looking at digital cameras right now. Then I'll finally have a way of taking and sending such photos! Now, if I could just decide which one... 73, Roy K6XK -- FAQ on WWW: http://www.contest; /archives//html/Amps/1999-03/msg00303.html (7,927 bytes)

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