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References: [ +from:wc6w_amps@yahoo.com: 193 ]

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81. Re: [Amps] Junk Connectors (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Fri, 24 Apr 2009 08:58:19 -0700 (PDT); If anyone has any need, I have a few of the good ol' American made parts for sale on my webpage: http://wc6w.50webs.com/wc6wfsw/index.html?fr44.html 73 & Good morning, Marv WC6W P.S.: The creeping ju; /archives//html/Amps/2009-04/msg00316.html (20,756 bytes)
82. [Amps] Anyone need some 6LB6's? (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Sun, 26 Apr 2009 12:43:45 -0700 (PDT); They just hopped out of the time closet here. Were these ever used in a radio application? They are compactron (12 pin) sweep tubes. I have 4 NIB. 73 & Good afternoon, Marv WC6W http://wc6w.50webs.co; /archives//html/Amps/2009-04/msg00369.html (6,614 bytes)
83. Re: [Amps] HV switch-mode power supply (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Thu, 21 May 2009 08:13:47 -0700 (PDT); Hi Larry, Some of the answers to your queries: <snip> <snip> 2000uF per KW is a good rule of thumb. Multiple caps in parallel are typically the most economical realization. A step start may be implem; /archives//html/Amps/2009-05/msg00150.html (11,338 bytes)
84. Re: [Amps] HV switch-mode power supply (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Fri, 22 May 2009 12:47:55 -0700 (PDT); Hi Larry, <snip> Your neighborhood trash may vary from the norm! <snip> It becomes an issue insomuch as the heat must go somewhere. An ol' iron supply is pretty darn efficient. An inefficient switche; /archives//html/Amps/2009-05/msg00157.html (11,449 bytes)
85. Re: [Amps] HV switch-mode power supply (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Tue, 26 May 2009 11:14:17 -0700 (PDT); My-oh-my, go away for a few days and the topic wanders off screen... sobeit! Here's a plan for a low noise, well regulated, solar powered, plate supply. Next week 1000+ Chrysler Dealers are going SK.; /archives//html/Amps/2009-05/msg00196.html (8,958 bytes)
86. Re: [Amps] Doorknob Caps Needed: Background (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Thu, 28 May 2009 10:29:03 -0700 (PDT); Hi Dick, <snip> <snip> A good "rule of thumb" is 4X the tune capacitance. The value is not at all critical. 100pF, or thereabouts, will be fine for 6 meters with your pair of 3-500's. There are some; /archives//html/Amps/2009-05/msg00245.html (8,320 bytes)
87. [Amps] FS: Parts that may be of some use in Amplifiers (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Mon, 1 Jun 2009 08:55:32 -0700 (PDT); 1N2804A 6.8V 50 Watt Zener Diodes, TO-3 NOS -- $10 each Stancor Transformer P-6461 117 VAC Primary / 10VCT @ 10 A Secondary, used -- $25 Triad Transformers -- 115V 60CPS Primary F21A 6.3VCT @ 10A Sec; /archives//html/Amps/2009-06/msg00000.html (9,639 bytes)
88. [Amps] Slightly OT: 250 degree panel meters (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Mon, 8 Jun 2009 09:14:22 -0700 (PDT); Just curious... Anyone happen to know how a 250 degree (deflection, not temperature!) panel meter is implemented? Goooglizing it doesn't seem to turn up any inside info... 73 & Good morning, Marv WC6; /archives//html/Amps/2009-06/msg00026.html (6,543 bytes)
89. Re: [Amps] Question: Ship Vacuum Variables at minimum or maximum? (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Wed, 10 Jun 2009 12:23:23 -0700 (PDT); Hi Bob, Per the Jennings catalog, vacuum variables should be shipped at min. C. 73 & Good afternoon, Marv WC6W http://wc6w.50webs.com/ _______________________________________________ Amps mailing lis; /archives//html/Amps/2009-06/msg00047.html (8,709 bytes)
90. Re: [Amps] Amp ideas needed (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Thu, 2 Jul 2009 09:22:17 -0700 (PDT); Hi Bill, 25 dB is a lot to expect from a single stage but... Perhaps, you should consider the 4CX350FJ. It only takes 20V peak RF drive. A swamped grid input, with a suitable parallel L to cancel the; /archives//html/Amps/2009-07/msg00042.html (8,361 bytes)
91. Re: [Amps] 4-1000A in LK2000 (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Fri, 3 Jul 2009 20:26:01 -0700 (PDT); Hi Kevin, The input impedance of a 4-1000A in "strapped" grounded grid is circa 110 ohms. A 3-1000Z runs around 65 ohms. Some input network tweaking will be necessary with a transistorized driver. 73; /archives//html/Amps/2009-07/msg00085.html (7,812 bytes)
92. Re: [Amps] 4-1000A in LK2000 (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Sat, 4 Jul 2009 09:45:12 -0700 (PDT); Hi Dick, The LK2000 was designed to be compatible with the 4-1000A; All the grids are grounded. A 4-1000A, in strapped GG, doesn't have quite the gain of a 3-1000Z. An experimental fellow might add a; /archives//html/Amps/2009-07/msg00092.html (10,861 bytes)
93. Re: [Amps] monitoring tube seal temps (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Sun, 5 Jul 2009 14:45:17 -0700 (PDT); Hi Larry, There are a couple manufacturers (names escape from my moldy old mind this afternoon) making complete sensors, with lenses and signal processing, in a transistor sized case covering up to 3; /archives//html/Amps/2009-07/msg00119.html (8,849 bytes)
94. Re: [Amps] monitoring tube seal temps (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Mon, 6 Jul 2009 09:07:27 -0700 (PDT); Hi Alex, Those parts won't suffice in this application. They work by summing the signal across multiple (2 or more) areas of the chip and don't produce an absolute output; Essentially an AC device. 7; /archives//html/Amps/2009-07/msg00124.html (8,557 bytes)
95. [Amps] FS: Parts that may be of some use in Amplifiers (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Sun, 19 Jul 2009 14:02:45 -0700 (PDT); 1N2804A 6.8V 50 Watt Zener Diodes, TO-3 NOS -- $10 each Stancor Transformer P-6461 117 VAC Primary / 10VCT @ 10 A Secondary, used -- $25 Triad Transformers -- 115V 60CPS Primary F21A 6.3VCT @ 10A Sec; /archives//html/Amps/2009-07/msg00217.html (8,998 bytes)
96. Re: [Amps] Relay Reglulator / Driver (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Tue, 21 Jul 2009 19:02:53 -0700 (PDT); Hi Mike, First a couple of suppositions. 1. I presume that the "cut off voltage" is negative. & 2. It has enough extra current capability for the relays. You can use a LM337 with a preregulator. Take; /archives//html/Amps/2009-07/msg00257.html (8,928 bytes)
97. Re: [Amps] inexpensive HV fuse (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Wed, 22 Jul 2009 14:17:34 -0700 (PDT); IGBT's have evolved to the point where one can build an Electronic Circuit Breaker that will disconnect the load in a microsecond or so. This approach avoids dumping all the energy from the filter ca; /archives//html/Amps/2009-07/msg00280.html (7,399 bytes)
98. Re: [Amps] inexpensive HV fuse (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Wed, 22 Jul 2009 17:30:28 -0700 (PDT); Hi Bill, Since it turns off in one uS, the filter cap(s) stay charged. The total let through power is on the order of one Joule. 73 & Good afternoon, Marv WC6W http://wc6w.50webs.com/ _______________; /archives//html/Amps/2009-07/msg00292.html (9,185 bytes)
99. Re: [Amps] inexpensive HV fuse (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Thu, 23 Jul 2009 08:24:24 -0700 (PDT); Hi Bill, Same application; 21st Century solution. Damage is avoided by shutting off the power, veryyyy quickly, rather than by shunting it. My post was in reply to the one that suggested using a crow; /archives//html/Amps/2009-07/msg00302.html (9,820 bytes)
100. Re: [Amps] inexpensive HV fuse (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Thu, 23 Jul 2009 08:41:57 -0700 (PDT); Hi Bill, The device I've proposed is located in the plate supply line between the PS filter caps and the tube. It is NOT on the primary side of the supply. 73 & Good morning, Marv WC6W http://wc6w.50; /archives//html/Amps/2009-07/msg00304.html (9,431 bytes)

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