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161. Re: [Amps] 2 more questions-- electrical (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Tue, 05 Apr 2011 09:19:45 -0400; No, that is not possible. The power company grounds IS thousands of ground rods one under every other power pole all the way back to the generating plant in parallel. AC impedance measurements here a; /archives//html/Amps/2011-04/msg00161.html (11,484 bytes)
162. Re: [Amps] Alpha vs Henry (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Fri, 08 Apr 2011 12:35:00 -0400; I'm pretty sure IR is radiated from objects and hot air is not an object. IR thermometer's accuracy is independent to of ambient air temperature. -- Ron KA4INM - Endless Loop: n. see Loop, Endless. L; /archives//html/Amps/2011-04/msg00302.html (9,667 bytes)
163. Re: [Amps] Alpha vs Henry (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sat, 09 Apr 2011 02:36:52 +0000; It is simple, the air leaving a tube, it's temperature can not exceed that which is heating it. -- Ron KA4INM - Endless Loop: n. see Loop, Endless. Loop, Endless: n. see Endless Loop. -- Random Shac; /archives//html/Amps/2011-04/msg00307.html (9,667 bytes)
164. Re: [Amps] Alpha vs Henry (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sat, 09 Apr 2011 16:32:07 +0000; I can, if I can remember all the way to Monday morning, but the question is immaterial, because: "The temperature of air leaving a tube, can not exceed that which is heating it." -- Ron KA4INM - Endl; /archives//html/Amps/2011-04/msg00312.html (10,012 bytes)
165. Re: [Amps] Power handling of an SMA (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Wed, 27 Apr 2011 09:49:43 -0400; I have used, used PL259s that the solder didn't want to stick to, so I drilled out the holes (two at a time) with a drill bit a we bit larger than the original hole and the bare brass soldered like a; /archives//html/Amps/2011-04/msg00560.html (8,344 bytes)
166. Re: [Amps] PA efficiency (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Thu, 19 May 2011 09:17:34 -0400; I measure the Voltage with my Tektronix 475B. That's why I bought it. -- Ron KA4INM - "Ubuntu" -- an African word, meaning "Slackware is too hard for me". ___________________________________________; /archives//html/Amps/2011-05/msg00160.html (9,232 bytes)
167. Re: [Amps] Dummy load varying R (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Wed, 08 Jun 2011 11:33:19 -0400; Sure, try 6 OTHER Ohm meters on the load and the cable. -- Ron KA4INM - Every HAM should have at least one desk MIC, it's the perfect place to hang the cans when CW is "arm chair copy." _____________; /archives//html/Amps/2011-06/msg00104.html (8,047 bytes)
168. Re: [Amps] Watch out for a scam by... (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Thu, 16 Jun 2011 13:49:08 -0400; Q: Why is top posting such a bad thing? A: Top posting to a group, makes the reader read the posting out of order {bottom then top} to find out what the post is about. (especially annoying if 30 or 6; /archives//html/Amps/2011-06/msg00180.html (8,032 bytes)
169. Re: [Amps] Watch out for a scam by... (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Thu, 16 Jun 2011 15:55:17 -0400; It is silly to repeat all of post that you are replying to under any procedure top/bottom. It is a "length of a bridge thing." There is no "hunt and seek" if you have "> " turned on 4 quoted passages; /archives//html/Amps/2011-06/msg00185.html (8,705 bytes)
170. Re: [Amps] old commercial amp (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Fri, 17 Jun 2011 08:57:47 -0400; It may relate to the fact that once neutralized with 180 out of phase Voltage the capacitance need not vary (for any frequency) as long as the input or output tank remains balanced as is used for pus; /archives//html/Amps/2011-06/msg00207.html (9,200 bytes)
171. Re: [Amps] al-811 wont transmit (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sat, 18 Jun 2011 13:31:46 +0000; I think some CB foot warmers have "RF sensing" switching circuits. I know I've had several 2 meter amplifiers that did. (5 W in 35 W out) I don't think it is 100% stupidity. -- Ron KA4INM - The man w; /archives//html/Amps/2011-06/msg00218.html (8,811 bytes)
172. Re: [Amps] DIODE PIV Confusion (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Wed, 29 Jun 2011 14:03:09 -0400; You can measure the breakdown Voltage with a scope, ac power supply and a resistor. The "PIV RATING" is a breakdown Voltage that their products shall not fall below. 40 years ago I measured many 1N40; /archives//html/Amps/2011-06/msg00324.html (8,284 bytes)
173. Re: [Amps] Risks from continuous discharge of high voltage ?? (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sun, 03 Jul 2011 12:58:47 +0000; The production of X-rays requires something that does not exist in a transformer or the transformers would be lined with lead sheeting. Which is: "a high velocity stream of electrons that changes spe; /archives//html/Amps/2011-07/msg00013.html (8,395 bytes)
174. Re: [Amps] RAL color for Marconi AMP (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 04 Jul 2011 21:42:25 -0400; If you get no other help, you may be able to take the little door off and take it to a paint store that has a "color eye." -- Ron KA4INM - Youvan's corollary: Every action results in unwanted side ef; /archives//html/Amps/2011-07/msg00048.html (7,133 bytes)
175. Re: [Amps] What's wrong here- dropping resistor for DC meter? (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sat, 09 Jul 2011 08:37:48 -0400; Put a 1 or 2 k Ohm resistor at the bottom of the bleeder string then put a 1 mA meter across it, re-calibrate the meter card for k Volts. -- Ron KA4INM - WARNING TO ALL PERSONNEL: Firings will contin; /archives//html/Amps/2011-07/msg00076.html (7,852 bytes)
176. Re: [Amps] GS35b FWB issue] (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 11 Jul 2011 14:39:59 -0400; I have been puzzling over this, I think it is either something that is not on the schematic (like a terminal strip or mounting screw arcing) or the secondary winding is arcing to something, you need; /archives//html/Amps/2011-07/msg00113.html (7,844 bytes)
177. Re: [Amps] AC filament voltage regulator (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Thu, 14 Jul 2011 09:38:14 -0400; Hsu said his idea is to use the CdS photo-resistor and a micro-bulb to create a home made photo-coupler to get a "slow response" version of a "opto-isolator" to measure a tube's heater Voltage, but t; /archives//html/Amps/2011-07/msg00152.html (9,329 bytes)
178. Re: [Amps] MOSFET ratings (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 18 Jul 2011 22:59:47 -0400; If the diode is for protection, it doesn't effect the operation until the diode/s starts to conduct. Therefor the device has speed limitations when it is over driven and different speed limitations w; /archives//html/Amps/2011-07/msg00220.html (8,115 bytes)
179. Re: [Amps] New NXP BLF578XR 1200W LDMOS FET is "indestructible" (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Fri, 22 Jul 2011 12:04:59 -0400; I suspect the "device" is ordinary, it is the "built-in protective circuit" that protects it and has that low frequency limit. (tiny torus core) Reflected power reduces drive internally. -- Ron KA4IN; /archives//html/Amps/2011-07/msg00259.html (9,663 bytes)
180. Re: [Amps] New NXP BLF578XR 1200W LDMOS FET is "indestructible" (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sat, 13 Aug 2011 08:53:13 -0400; I've never heard of this, but I see no theoretical limit problem, we can tolerate any output impedance if we are allowed to use a transformer/s. -- Ron KA4INM - I've been carving my initials on trees; /archives//html/Amps/2011-08/msg00047.html (8,426 bytes)

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