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References: [ +from:G3SEK@ifwtech.demon.co.uk: 419 ]

Total 419 documents matching your query.

141. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 5 Jun 1999 23:33:51 +0100; Picking up one of Rich's points: Here's part of a message sent to me some months ago, by someone who reads these debates but chooses not to take part publicly - (Quoted with permission, of course. Th; /archives//html/Amps/1999-06/msg00152.html (10,754 bytes)
142. [AMPS] slam tally (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 8 Jun 1999 07:51:34 +0100; Experimenter's Handbook: "Buzz Miklos, WA4GPM... is currently [ = was, when written] the manager for R&D for RF cavities and tubes at VARIAN EIMAC in Salt Lake City, Utah." 73 from Ian G3SEK Editor,; /archives//html/Amps/1999-06/msg00251.html (10,484 bytes)
143. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 9 Jun 1999 13:28:45 +0100; There's one little word missing there: you mean dissipation RATING. The resistor's dissipation limit is set by the maximum working temperature, so the dissipation rating - the dissipation that is ava; /archives//html/Amps/1999-06/msg00302.html (10,321 bytes)
144. [AMPS] slam tally (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 9 Jun 1999 13:44:44 +0100; Yes, it's bad form, because: (a) Your assertion - which is contradicted by several other sources - is based on a telephone conversation with some random person in HR who had no incentive to give you; /archives//html/Amps/1999-06/msg00303.html (9,589 bytes)
145. [AMPS] slam tally (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 9 Jun 1999 22:56:57 +0100; No... and that's precisely the point that you're missing about all this. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.demon.co.uk/g3sek; /archives//html/Amps/1999-06/msg00328.html (9,172 bytes)
146. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 14 Jun 1999 18:37:20 +0100; This brings us back to the old problem that we never know the condition of the resistor (and/or tube) immediately before it failed. Was it still like new, or had it already deteriorated way out of sp; /archives//html/Amps/1999-06/msg00440.html (9,876 bytes)
147. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 15 Jun 1999 06:52:50 +0100; But that still doesn't answer the question. Nobody checks until *after* the amplifier fails. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwte; /archives//html/Amps/1999-06/msg00445.html (9,674 bytes)
148. [AMPS] measuring meter shunt resistance (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Fri, 18 Jun 1999 06:56:21 +0100; Try thinking about it a different way - what you really need is to know is that when (say) 1.0A is passing through the plate meter shunt, the plate meter reads 1.0A. Thinking about it that way gives; /archives//html/Amps/1999-06/msg00517.html (8,923 bytes)
149. [AMPS] Testing for Balanced Output from antenna Tuner (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 21 Jun 1999 13:11:24 +0100; Somewhere... somewhere... I remember seeing a description of a gadget with two toroidal current transformers and a switchable rectifier/load. It allowed you to measure I1, I1 and also (I1-I2). For re; /archives//html/Amps/1999-06/msg00562.html (10,237 bytes)
150. [AMPS] Henry 2K2 (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 11 May 1999 20:47:04 +0100; Picking up on one of Rich's remarks: It doesn't really matter which end of the HV circuit the glitch resistor and HV fuse are - unless the designer thinks that putting them in the negative return rai; /archives//html/Amps/1999-05/msg00139.html (8,788 bytes)
151. [AMPS] Henry 2K2 (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 12 May 1999 08:33:05 +0100; I believe so... a choke input supply still needs a glitch resistor, to handle the current surge out of the smoothing capacitor. If the choke and resistor are in the negative side, the choke would con; /archives//html/Amps/1999-05/msg00144.html (9,055 bytes)
152. [AMPS] Henry 2K2 (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 12 May 1999 13:27:10 +0100; You're obviously a bigger cricket fan than I am, Rich! Where were we...? The cathode doesn't go strongly negative at all - it stays around chassis potential, much as it would if the glitch resistor i; /archives//html/Amps/1999-05/msg00146.html (9,952 bytes)
153. [AMPS] Henry 2K2; glitch resistor in negative HV considerations (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 12 May 1999 23:01:56 +0100; I see it exactly the same as you, Dick. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.demon.co.uk/g3sek -- FAQ on WWW: http://www.contes; /archives//html/Amps/1999-05/msg00157.html (8,364 bytes)
154. [AMPS] Henry 2K2 (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 12 May 1999 22:59:56 +0100; Agreed - that's the only location where it is equivalent to placing it in the B+ lead. Probably not. More to the point, is there a tube manufacturer who does not recommend placing the glitch-R in the; /archives//html/Amps/1999-05/msg00158.html (8,722 bytes)
155. [AMPS] Big Bang Theories? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 18 May 1999 08:07:07 +0100; Been there... done that... BIG mistake... Or perhaps it still was (see other posting). If there's one thing worse than a big bang, it's when it happens the morning after an evening spent with Master; /archives//html/Amps/1999-05/msg00206.html (8,097 bytes)
156. [AMPS] Big Bang Theories? (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 18 May 1999 08:14:30 +0100; The gases do not "burn up" - you're thinking atmospheric chemistry, not vacuum chemistry. All the metal and ceramic materials used to make the tube are processed to be almost gas-free, but this can n; /archives//html/Amps/1999-05/msg00207.html (11,370 bytes)
157. [AMPS] voltage breakdown vs pressure (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 18 May 1999 19:58:28 +0100; Here's an interesting figure to throw into the discussion: at that pressure (10^-6 to 10^-7 mm of mercury) the so-called "vacuum space" between the electrodes of a typical amateur-size transmitting t; /archives//html/Amps/1999-05/msg00214.html (7,403 bytes)
158. [AMPS] more vacuum (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 19 May 1999 22:12:26 +0100; Thanks, John, very interesting - especially bit about the gas burps. (In a vacuum, no-one can you hear you burp...?) Someone was telling me about a way to test tubes for gas by running them in "ion-g; /archives//html/Amps/1999-05/msg00238.html (7,930 bytes)
159. [AMPS] FCC Actions at Dayton (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 22 May 1999 10:45:32 +0100; This 6m problem had puzzled me, too, when G4GHP and I were thinking about developing a 2 x 4CX400A amp kit for 6m as well as 2m. Obviously, if the kits couldn't be exported legally to the USA, the wh; /archives//html/Amps/1999-05/msg00280.html (11,173 bytes)
160. [AMPS] FCC Actions at Dayton (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 22 May 1999 20:52:50 +0100; 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.demon.co.uk/g3sek -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@c; /archives//html/Amps/1999-05/msg00286.html (8,574 bytes)

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