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References: [ +from:gdaught6@stanford.edu: 176 ]

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81. Re: [Amps] Quad Tube 4cx800 hf amp (score: 1): Author: gdaught6@stanford.edu; Date: Thu, 25 May 2006 23:07:12 -0700; I have run a 4cx800a at 2500 volts (and 350v on the screen) for 10 years with no problems. 73, George T. Daughters, K6GT _______________________________________________ Amps mailing list Amps@contest; /archives//html/Amps/2006-05/msg00369.html (8,586 bytes)
82. Re: [Amps] 813's (score: 1): Author: gdaught6@stanford.edu; Date: Sat, 27 May 2006 18:38:16 -0700; I used (as did many others) the ART-13 military transmitter which used an 813 in the horizontal position. It was a Collins rig, if I recall correctly (it was in 1957-1964 for gosh sake! That's a whil; /archives//html/Amps/2006-05/msg00437.html (8,508 bytes)
83. [Amps] for will matney (score: 1): Author: gdaught6@stanford.edu; Date: Fri, 09 Jun 2006 20:42:07 -0700; First, my apologies to all for "broadcasting" this to the list. It's for Will, but I've misplaced his address. Will, I have a 2-section, 11 position ceramic rotary switch if you still need it. Contac; /archives//html/Amps/2006-06/msg00249.html (6,258 bytes)
84. [Amps] fiberglas tape (score: 1): Author: gdaught6@stanford.edu; Date: Mon, 12 Jun 2006 20:21:07 -0700; Hi, I've often read "wind the toroid core with fiberglas tape..." What the heck is fiberglas tape? There is fiberglass tape for patching drywall, and for covering seams when building a boat, and othe; /archives//html/Amps/2006-06/msg00264.html (7,060 bytes)
85. [Amps] fiberglas tape : summary (score: 1): Author: gdaught6@stanford.edu; Date: Thu, 15 Jun 2006 10:03:50 -0700; Thanks to all who responded to my query about fiberglas tape. The consensus was that Scotch 27 is the thing to use. Other suggestions were for strapping tape (like for packages) which might work OK,; /archives//html/Amps/2006-06/msg00296.html (6,532 bytes)
86. [Amps] cathode return? (score: 1): Author: gdaught6@stanford.edu; Date: Sun, 25 Jun 2006 14:33:07 -0700; Gentlemen, I am in the throes of building a grid-driven amplifier using a tube with a thoriated-tungsten filament that has a rather unusual filament voltage, and my filament transformer has no center; /archives//html/Amps/2006-06/msg00395.html (7,341 bytes)
87. Re: [Amps] cathode return question (score: 1): Author: gdaught6@stanford.edu; Date: Mon, 26 Jun 2006 12:20:04 -0700; Thanks to those who responded to my query about the cathode connection on a thoriated tungsten filament tube! The obvious answer is that if I don't use some means to balance out the AC that's heating; /archives//html/Amps/2006-06/msg00453.html (6,611 bytes)
88. Re: [Amps] Passive Grid Resistor Source? (score: 1): Author: gdaught6@stanford.edu; Date: Mon, 21 Aug 2006 21:31:11 -0700; Lee, you might try to locate some TO-220 sized power resistors made by Caddock. They mount on a heatsink, but they are compact and have low intrinsic inductance. A couple of 100 ohm 50 watt units cou; /archives//html/Amps/2006-08/msg00585.html (7,661 bytes)
89. Re: [Amps] Inverter Microwave HV Supply (score: 1): Author: gdaught6@stanford.edu; Date: Tue, 22 Aug 2006 21:15:27 -0700; In my experience the Panasonic "inverter" is a great source of RFI. When my wife heats her coffee, or poaches our salmon, the AM radio, the TV, and my ham bands are all clobbered. Maybe some quieting; /archives//html/Amps/2006-08/msg00623.html (7,267 bytes)
90. Re: [Amps] Need GU-74B info (score: 1): Author: gdaught6@stanford.edu; Date: Tue, 29 Aug 2006 16:32:00 -0700; The GU-74B WILL NOT substitute for a 3cx800a without considerable modification to the circuitry. The 3cx800a is a triode, and the GU- 74B is a tetrode... and it's a tetrode that will NOT do well if i; /archives//html/Amps/2006-08/msg00787.html (6,832 bytes)
91. Re: [Amps] Fixed Transmitting Capacitors: REVISITED (score: 1): Author: gdaught6@stanford.edu; Date: Tue, 17 Oct 2006 16:01:11 -0700; Tony, I0JX deals with these questions very nicely. Go to: http://www.geocities.com/SiliconValley/Pines/5440/index.html and click on the 9th subject line under "Technical". 73, George T. Daughters, K6; /archives//html/Amps/2006-10/msg00190.html (8,119 bytes)
92. Re: [Amps] 8877 Longetivity (score: 1): Author: gdaught6@stanford.edu; Date: Mon, 29 Jan 2007 09:27:17 -0800; Many have contributed to this thread, and the one thing we can all take away from it is a new word: longetivity. 8>) [note smiley thing]. 73, George T. Daughters, K6GT _______________________________; /archives//html/Amps/2007-01/msg00320.html (7,641 bytes)
93. [Amps] reducing filament oltage (score: 1): Author: gdaught6@stanford.edu; Date: Fri, 02 Feb 2007 09:34:51 -0800; Regarding W2CQM's question regarding reducing filament voltage: his transformer is a single unit supplying filament, anode, and bias/control voltages. If a resistor is put in the primary of the trans; /archives//html/Amps/2007-02/msg00014.html (6,726 bytes)
94. Re: [Amps] High Power (score: 1): Author: gdaught6@stanford.edu; Date: Sun, 18 Feb 2007 16:55:41 -0800; < snip > That's an opinion that I share as well, Tom. In fact, sometimes there is little-or-no increase in the desired signal when this is done, as you said. The increase in measured output power is; /archives//html/Amps/2007-02/msg00287.html (8,044 bytes)
95. Re: [Amps] Old POwer Cord (score: 1): Author: gdaught6@stanford.edu; Date: Sat, 03 Mar 2007 22:32:05 -0800; It's not just Dentron. I had to replace one on an Alpha amp recently. OK, it's an OLD alpha amp (70V) but the black wire in the cord was crunchy the whole length. The white and green were OK. Moral :; /archives//html/Amps/2007-03/msg00048.html (6,670 bytes)
96. Re: [Amps] Doorknob capacitors (score: 1): Author: gdaught6@stanford.edu; Date: Wed, 21 Mar 2007 19:08:16 -0700; Tony, I0JX, has a good discussion of this subject at: http://www.geocities.com/SiliconValley/Pines/5440/index.html go down the list 6 or 7 lines, and you'll find lots about capacitors in RF circuits.; /archives//html/Amps/2007-03/msg00295.html (7,914 bytes)
97. Re: [Amps] RE : ?amp hardware (score: 1): Author: gdaught6@stanford.edu; Date: Wed, 11 Apr 2007 11:29:26 -0700; < snip, snip > Which brought to mind a question that I've been dealing with for many, many years: "What is the correct size pilot hole for selftapping sheet metal screws?" I have always measured the; /archives//html/Amps/2007-04/msg00080.html (7,477 bytes)
98. Re: [Amps] RE : amp hardware (score: 1): Author: gdaught6@stanford.edu; Date: Thu, 12 Apr 2007 08:26:32 -0700; Excellent! Thank you Steve. 73, George T. Daughters, K6GT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2007-04/msg00090.html (7,626 bytes)
99. [Amps] (Fwd) Amp tube pin/socket de VY1JA (score: 1): Author: gdaught6@stanford.edu; Date: Sat, 14 Apr 2007 20:30:28 -0700; Ampsters, Here is a query from a friend up in the Yukon about a problem he has with his amp. Can anybody respond? vy 73, -- Forwarded message follows -- With the AL80 on line at about 350 Watts, in a; /archives//html/Amps/2007-04/msg00125.html (8,587 bytes)
100. [Amps] 3-500z filament problem (score: 1): Author: gdaught6@stanford.edu; Date: Wed, 18 Apr 2007 21:53:28 -0700; Many thanks to all who responded to my request for help with the 3- 500z filament problem being experienced in the Yukon. I distilled and forwarded all to Jay. vy 73, George T. Daughters, K6GT ______; /archives//html/Amps/2007-04/msg00203.html (6,672 bytes)

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