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61. [AMPS] bright light (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 18 Nov 2001 14:26:53 +0000; Which one do you expect to glow with a bright light? -- 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com/g3sek -- FAQ on WWW: http://ww; /archives//html/Amps/2001-11/msg00322.html (7,944 bytes)
62. [AMPS] 8877 rectifier board considerations (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 20 Nov 2001 15:39:05 +0000; No, they're not just tales. There are two ways gas can get into a vacuum tube. One is through a faulty seal, as Rich said. But even if a tube has perfect seals, the inside surfaces of the tube can ve; /archives//html/Amps/2001-11/msg00376.html (11,314 bytes)
63. [AMPS] HV connectors (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 20 Nov 2001 20:18:15 +0000; Well, you remembered most of it. SHV is based on BNC but is much more modified than MHV, so SHV will not accidentally mate with any other connector. Both contacts are deeply recessed, and the ground; /archives//html/Amps/2001-11/msg00391.html (8,959 bytes)
64. [AMPS] Meter faces... (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sat, 24 Nov 2001 08:43:43 +0000; I don't have that article, but a friend who repairs and resells RF heaters has done a lot of work on this (because the meters are always getting damaged). After trying rub-on transfers and various sc; /archives//html/Amps/2001-11/msg00407.html (8,329 bytes)
65. [AMPS] Screen supply & negative current???? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 28 Nov 2001 07:42:55 +0000; [...] Correct. There is information on this and many other related topics on my site, at www.ifwtech.com/g3sek/boards/tetrode/tetrode-3.htm Click 'Downloads' to jump to the bottom of the page, and th; /archives//html/Amps/2001-11/msg00455.html (8,078 bytes)
66. [AMPS] v's (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 28 Nov 2001 23:40:48 +0000; People don't send you these 'worm' programs - they send themselves. They may spread in two ways: by copying addresses from an existing victim's Outlook address book; or by trawling through cached cop; /archives//html/Amps/2001-11/msg00469.html (8,261 bytes)
67. [AMPS] DOD006 / RCA-7213 Tubes (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Thu, 4 Oct 2001 16:58:22 +0100; A real 7213 works fine at 432, but a DOD006 isn't quite the same. As far as I know, only G3LTF has made a DOD006 work well at 432, though they work fine at 144 and, yes, even on HF. I haven't heard o; /archives//html/Amps/2001-10/msg00070.html (7,729 bytes)
68. [AMPS] Re: [HomeBrew] Fan->make correct and 8877 vs GS35 (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sat, 6 Oct 2001 08:14:36 +0100; Nothing on the website or the "DX Book" but it's very simple: you time how long it takes for the outlet air to fully inflate a light plastic bag. The idea comes courtesy of George, K6GT. The volume o; /archives//html/Amps/2001-10/msg00117.html (8,761 bytes)
69. [AMPS] Finding the Q of a Coil (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 7 Oct 2001 08:32:56 +0100; VE3ERP (Mr HAMCALC) has produced a new version that does just what you need. The theory is described the current QEX (Sept/Oct). The download address is www.arrl.org/qexfiles/ and the file is Murphy0; /archives//html/Amps/2001-10/msg00137.html (8,800 bytes)
70. [AMPS] Finding the Q of a Coil (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 7 Oct 2001 16:43:13 +0100; I should have mentioned, it's all based on info from Terman. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com/g3sek -- FAQ on WWW: http; /archives//html/Amps/2001-10/msg00152.html (8,875 bytes)
71. [AMPS] Discharge energy (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 8 Oct 2001 10:49:45 +0100; When the capacitor is discharged through the series combination of the resistor and the tube, the stored energy is divided between those two components. Strictly speaking the energy going into the tu; /archives//html/Amps/2001-10/msg00167.html (9,504 bytes)
72. [AMPS] Tuned Input Circuit Q (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 9 Oct 2001 19:05:54 +0100; Amplifiers for 50 and 144MHz often use what look like L-C-L T-networks because the tube's own input capacitance makes it difficult to design a pi-network with sensible component values. What you actu; /archives//html/Amps/2001-10/msg00240.html (9,205 bytes)
73. [AMPS] G3SEK (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 21 Oct 2001 13:33:51 +0100; And is back at the keyboard - a bit achey and tottering around on crutches, but otherwise OK and glad to be home. Thanks for all the good wishes. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In P; /archives//html/Amps/2001-10/msg00411.html (6,974 bytes)
74. [AMPS] Amps and Microprocessors (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Thu, 25 Oct 2001 09:20:44 +0100; I can't reply directly to the questions on microprocessors, but some experience with several hundred Triode Boards and Tetrode Boards may be worth sharing. First of all, if the amplifier is well desi; /archives//html/Amps/2001-10/msg00481.html (14,157 bytes)
75. [AMPS] How to control a vacuum C ?? (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 31 Oct 2001 18:35:13 +0000; Good thought, Marv - the motor will try to keep going until the magnetic field collapses after switch-off. A reverse diode in parallel with the winding(s) will provide a path for the back-EMF, but it; /archives//html/Amps/2001-10/msg00515.html (8,088 bytes)
76. [AMPS] HA-10 Warrior Parasitic Supressor Inductor Values (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 3 Sep 2001 14:37:16 +0100; "So-called" is correct. According to the schematics, it consisted of a feedback capacitor from the output end of the pi-tank, back to the cathode. This will produce feedback of variable amplitude and; /archives//html/Amps/2001-09/msg00031.html (9,546 bytes)
77. [AMPS] HA-10 Warrior Parasitic Supressor Inductor Values (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 3 Sep 2001 17:36:45 +0100; Sorry, it appears I was confusing the Warrior with another amp... maybe the Yaesu, though I don't recall ever seen that schematic. I agree that a phase inverting transformer, coupled as you describe,; /archives//html/Amps/2001-09/msg00036.html (11,526 bytes)
78. [AMPS] HA-10 Warrior Parasitic Supressor Inductor Values (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Mon, 3 Sep 2001 22:41:18 +0100; Just a plain fact. The circuits are different. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com/g3sek -- FAQ on WWW: http://www.contest; /archives//html/Amps/2001-09/msg00041.html (9,432 bytes)
79. [AMPS] HA-10 Warrior Parasitic Supressor Inductor Values (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 4 Sep 2001 07:38:48 +0100; Basic electronic theory remains the same, but the circuit is different so the ways they operate are too. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http; /archives//html/Amps/2001-09/msg00054.html (10,074 bytes)
80. [AMPS] HA-10 Warrior Parasitic Supressor Inductor Values (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Tue, 4 Sep 2001 14:08:19 +0100; We were just told that neutralization is carried out at the high end of the operating range. It's just another kind of balanced bridge, so it should improve stability at the VHF resonant frequency to; /archives//html/Amps/2001-09/msg00057.html (10,122 bytes)

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