Mail Archive Search: <+from:g8on@fsmail.net>

Results:

References: [ +from:g8on@fsmail.net: 246 ]

Total 246 documents matching your query.

61. Re: [Amps] OTA TV (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Mon, 05 Aug 2013 14:46:56 +0200; Paul digital geek, and I am usually very slow to adopt new technologies.< Like me, but you are more advanced - I don't even HAVE a TV set! 73 Peter G3RZP _____________________________________________; /archives//html/Amps/2013-08/msg00043.html (6,832 bytes)
62. Re: [Amps] Dummy load. Can distilled water be used instead of oil ? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 11 Aug 2013 18:29:57 +0200; One problem is that water has a dielectric constant of about 78, as opposed to around 3 for things like liquid paraffin. The resistors, assuming that you have thin wall tube, will be in a transmissio; /archives//html/Amps/2013-08/msg00077.html (10,230 bytes)
63. Re: [Amps] Electron HOLE flow (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Wed, 28 Aug 2013 20:33:26 +0200; == Message Received: Aug 28 2013, 07:31 PM From: "peter chadwick" <g8on@fsmail.net> To: "Mike Waters" <mikewate@gmail.com> Cc: Subject: Re: [Amps] Electron HOLE flow Scroggie's 1960 book "Principles; /archives//html/Amps/2013-08/msg00160.html (9,228 bytes)
64. Re: [Amps] What causes arc over on the BeO2 ceramic insulator of an 8877? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 31 Aug 2013 10:12:13 +0200; John, Are you sure the ceramic insulator in an 8877 is BeO2? It is not mentioned in the data sheet, and generally, where BeO2 is used, the fact is mentioned because of the problems of dust. 73 Peter; /archives//html/Amps/2013-08/msg00187.html (6,996 bytes)
65. Re: [Amps] Bird 43 (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 31 Aug 2013 20:58:26 +0200; Mine is 1352 ohms - +/- 5 ohms. 73 Peter G3RZP == Message Received: Aug 31 2013, 06:10 PM From: "George Hall" <N2CG@VERIZON.NET> To: "'Col. Paul E. Cater'" <paulecater@gmail.com>, "'Amps reflector'"; /archives//html/Amps/2013-08/msg00192.html (8,329 bytes)
66. Re: [Amps] Future of RF AMPS (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Wed, 11 Sep 2013 02:58:50 +0200; I am still waiting to see a review of a SS amp that is as good as the last generation of tube amps when one looks at the generation of high order IM products. With pre-distortion and a totally digita; /archives//html/Amps/2013-09/msg00018.html (11,853 bytes)
67. Re: [Amps] Future of RF AMPS (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Wed, 11 Sep 2013 22:09:38 +0200; Manfred, you do have a point BUT My transceiver is a rather old and much modified FT102, using three 6146B tubes in the PA with negative feedback to the driver. The 3rd order IMD is -44dB relative to; /archives//html/Amps/2013-09/msg00043.html (9,777 bytes)
68. Re: [Amps] design approach for QRO solid state (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Thu, 12 Sep 2013 17:21:20 +0200; Adding to Roger's comment on diffusion and temperature, this is why old tunnel diodes are often u/s. Tunnel diodes use very high doping levels, and some diffusion occurs over time even at room temper; /archives//html/Amps/2013-09/msg00076.html (7,236 bytes)
69. Re: [Amps] Clipperton-L question (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Thu, 12 Sep 2013 17:40:05 +0200; Carl, Do you know if those BC375 switches (still available from Fair Radio Sales!) were a standard switch that mostly got used in the BC375, or were they manufactured especially for the BC375? 73 Pet; /archives//html/Amps/2013-09/msg00078.html (8,062 bytes)
70. [Amps] DSB AM - was S/S Amp's (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Thu, 12 Sep 2013 22:57:16 +0200; They don't take up any more bandwidth than DSBSC, so why not? Plus Am is easier to detect..... 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com ht; /archives//html/Amps/2013-09/msg00091.html (7,276 bytes)
71. Re: [Amps] S/S Amp's (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 09:34:22 +0200; <A cathode follower can solve the problem, though.> A cathode follower can solve many problems. Some years ago, one afternoon I had the tower cranked over and the garden full of bits of aluminium as; /archives//html/Amps/2013-09/msg00104.html (8,405 bytes)
72. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 14:55:25 +0200; Jim, I have got from somewhere a 'circle cutter'. The difficulty with the plain fly cutter is that it is inherently unbalanced and so has a tendency to dig into the work and 'pick it up'. My circle c; /archives//html/Amps/2013-09/msg00109.html (8,531 bytes)
73. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 17:52:20 +0200; Realistically, fly cutters are no more and no less dangerous than an end mill or slot drill. Tools and especially machine tools need to be treated with care and respect...like amplifiers. There's no; /archives//html/Amps/2013-09/msg00126.html (7,951 bytes)
74. Re: [Amps] Rectifier equilization? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 19:48:50 +0200; If they are off the same reel, you should be OK without resistors. 1N5408s are pretty slow, so I don't think you need capacitors, either. But an MOV on the transformer primary and step start are good; /archives//html/Amps/2013-09/msg00132.html (8,297 bytes)
75. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 19:52:38 +0200; Exactly, Manfred. 73 Peter G3RZP == Message Received: Sep 13 2013, 06:38 PM From: "Manfred Mornhinweg" <manfred@ludens.cl> To: amps@contesting.com Cc: Subject: Re: [Amps] Workshop Danger Like many ho; /archives//html/Amps/2013-09/msg00133.html (9,673 bytes)
76. Re: [Amps] Rectifier equilization? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 23:03:52 +0200; The Applications and Design engineers in the company I worked for (making very big diodes) were very dubious about using unmatched i.e. not from the same batch diodes and relying on avalanching provi; /archives//html/Amps/2013-09/msg00140.html (7,826 bytes)
77. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Fri, 13 Sep 2013 23:13:08 +0200; I too have a machine shop and I agree 100% with Roger. Especially on clothing, and NEVER wear a necktie. Always use safety goggles where appropriate, like wise ear protection. When drilling, ease the; /archives//html/Amps/2013-09/msg00141.html (8,597 bytes)
78. Re: [Amps] Workshop Danger (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 14 Sep 2013 00:50:15 +0200; Depends on the tool. An old worn file grinds down real well to make a scraper. Broken drills and small end mills and taps grind down well to make the tool bits for a boring bar or even fly cutter bi; /archives//html/Amps/2013-09/msg00148.html (8,309 bytes)
79. Re: [Amps] Rectifier equilization? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 14 Sep 2013 22:00:01 +0200; Yes, Hardy, that's the way I would go. Except being a Brit, I'd spell it "equalisation"! 73 Peter G3RZP == Message Received: Sep 14 2013, 08:40 PM From: "Hardy Landskov" <n7rt@cox.net> To: "Manfred M; /archives//html/Amps/2013-09/msg00168.html (11,993 bytes)
80. Re: [Amps] Direct rectification of AC mains to derive the amp VDD supply (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Mon, 16 Sep 2013 13:31:37 +0200; You need to ensure that the neutral is not earthed at any time by the amplifier, too. Safety requirements would dictate double insulation. As Leigh says the myriad legal requirements for commercially; /archives//html/Amps/2013-09/msg00197.html (7,005 bytes)

Current List: 61 - 80
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]