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

Results:

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

Total 246 documents matching your query.

41. Re: [Amps] rms Volts, Amps and Watts (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 10 Mar 2013 10:42:31 +0100; I seem to remember that motors for things like electric locomotives have a 5 minute rating and a 1 hour rating, and the 5 minute rating is quite a lot higher. That gives more power to get the train r; /archives//html/Amps/2013-03/msg00139.html (8,980 bytes)
42. Re: [Amps] FW: Power factor correction on tube amps (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 10 Mar 2013 10:52:21 +0100; all.< I wouldn't say that, Bill. Just think of the money spent on air fares, hotels, meals and so-on (CIA, Secret Service and FBI can be more specific on what the so-on can include!) for the people w; /archives//html/Amps/2013-03/msg00140.html (8,679 bytes)
43. Re: [Amps] BURNING IN A TUBE (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 23 Mar 2013 18:24:46 +0100; Depends on how 'new' the tube is. If it IS new, no need. If it's 'NOS', then it depends. It seems that generally ceramic tubes will just need the heater running (plus any forced air cooling for the s; /archives//html/Amps/2013-03/msg00311.html (7,862 bytes)
44. Re: [Amps] BURNING IN A TUBE (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 23 Mar 2013 23:10:59 +0100; I'd worry more about the testing before you got it....... Quoting TexasRF@aol.com: Anything beyond three hours and it's a gamble. Don W4DNR _______________________________________________ Amps mailin; /archives//html/Amps/2013-03/msg00314.html (8,277 bytes)
45. Re: [Amps] instability issue (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Wed, 27 Mar 2013 15:56:54 +0100; The classic cause of LF oscillation (LF parasitics) is a grid choke and an anode choke going off in a TPTG fashion because the neutralisation isn't right at the low frequency. If the plate choke has; /archives//html/Amps/2013-03/msg00347.html (8,093 bytes)
46. Re: [Amps] Band switch (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 06 Apr 2013 09:55:39 +0200; Those switches are good for at least 20 amps, so parallleling contacts is unnecessary, especially as for bandswitches, you don't (or shouldn't!) hot switch. Stacking sections to turn them into n-pole; /archives//html/Amps/2013-04/msg00023.html (7,619 bytes)
47. Re: [Amps] chassis maker? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 04 May 2013 17:02:08 +0200; Colin, The aeroplane is likely to be less forgiving of poor riveting than a chassis, though! == Message Received: May 04 2013, 03:27 PM From: "Colin Lamb" <k7fm@teleport.com> To: amps@contesting.com; /archives//html/Amps/2013-05/msg00073.html (8,842 bytes)
48. Re: [Amps] chassis maker? (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 05 May 2013 10:27:00 +0200; One alternative to a shear is to use two steel angles clamped with the sheet metal between the angles, and then saw so you get a straight line. Then draw file for a good finish. Messy, time consuming; /archives//html/Amps/2013-05/msg00092.html (10,361 bytes)
49. Re: [Amps] FW: 4CX5000A in common grid circuit (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 05 May 2013 10:49:29 +0200; I have a feeling that to get the higher gain in gg with a tetrode will require there to be volts on the screen grid. If it's directly grounded, you need a big drive signal to get the peak plate curre; /archives//html/Amps/2013-05/msg00093.html (9,965 bytes)
50. Re: [Amps] FW: 4CX5000A in common grid circuit (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 05 May 2013 12:53:33 +0200; The G2DAF configuration has had, over many years, a very poor reputation for producing broad signals. 73 Peter G3RZP == Message Received: May 05 2013, 11:07 AM From: "Ville Lintervo" <villelintervo@h; /archives//html/Amps/2013-05/msg00096.html (8,049 bytes)
51. Re: [Amps] Pre-Distortion Linearizer (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 05 May 2013 13:19:46 +0200; Manufacturers have gone mad about IMD in receivers but can you use it? e.g. a +40dBm TOIP with a 10dB NF. In SSB, that's an rx noise floor of -130dBm and an SFDR of 113dB. To use that, you need phase; /archives//html/Amps/2013-05/msg00097.html (9,385 bytes)
52. Re: [Amps] 4CX5000A in common grid circuit (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Mon, 06 May 2013 00:20:30 +0200; I'm not sure what you mean here by mu. mu is dVp/dVg. Gm is dIp/dVg and ra is dVp/dIp so mu is Gm times ra. So for any given screen voltage, you can figure the mu, because at a given grid voltage, Va; /archives//html/Amps/2013-05/msg00103.html (11,137 bytes)
53. Re: [Amps] 4CX5000A in common grid circuit (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Mon, 06 May 2013 10:00:00 +0200; Hi Markku, Have a look at 'Single Sideband Principals and Circuits' by Pappenfus, Bruene and Schoenike - the 1964 edition. Or better, see if your local library can get you a copy of the article. E.L.; /archives//html/Amps/2013-05/msg00110.html (14,744 bytes)
54. Re: [Amps] 4CX5000A in common grid circuit (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Mon, 06 May 2013 16:25:55 +0200; Markku, Scans coming from a different email address because of size limitations with this ISP. 73 Peter G3RZP == Message Received: May 06 2013, 02:43 PM From: "Markku Oksanen" <markku.a.oksanen@kolum; /archives//html/Amps/2013-05/msg00111.html (18,382 bytes)
55. Re: [Amps] 4CX5000A in common grid circuit (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Mon, 06 May 2013 16:31:55 +0200; Markku, Once you have the data sheet, it is easy to determine the values of gm, Rp and mu from it, especially as mu = gm times Rp. 73 Peter G3RZP == Message Received: May 06 2013, 02:43 PM From: "Mar; /archives//html/Amps/2013-05/msg00112.html (17,946 bytes)
56. Re: [Amps] Advice needed for SS amp (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Thu, 06 Jun 2013 11:47:15 +0200; I believe that at one time, there was a US mil airborne HF Tx that used a 4CX350 with the whole PA compartment liquid cooled with a relatively inert silicone oil fluid. Although not quite as good as; /archives//html/Amps/2013-06/msg00084.html (8,312 bytes)
57. Re: [Amps] Tube identification (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 20 Jul 2013 18:52:20 +0200; I've just looked through my 1984 Eimac power grid short-form catalogue, and can't find anything looking like that which you describe. 73 Peter G3RZP == Message Received: Jul 20 2013, 04:40 PM From: "; /archives//html/Amps/2013-07/msg00054.html (7,415 bytes)
58. Re: [Amps] Shortwave Returns? [Was: testing the biggest one] (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 03 Aug 2013 18:02:44 +0200; There's still a lot of Africa and some Asian countries e.g. parts of rural India and rural Bangladesh who have no mains electricity, internet or money for TVRO satellite equipment, where a battery po; /archives//html/Amps/2013-08/msg00023.html (8,546 bytes)
59. Re: [Amps] Shortwave Returns? [Was: testing the biggest one] (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sat, 03 Aug 2013 21:33:55 +0200; Exactly, Karl-Arne! Tak! 73 Peter G3RZP == Message Received: Aug 03 2013, 08:09 PM From: "Karl-Arne Markström" <sm0aom@telia.com> To: g8on@fsmail.net, "Richard Solomon" <dickw1ksz@gmail.com>, "amps@c; /archives//html/Amps/2013-08/msg00031.html (10,087 bytes)
60. Re: [Amps] OTA TV (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Sun, 04 Aug 2013 19:51:31 +0200; Bill, boost their profits considerably. Also those that manufactured the conversion boxes that were purchased with coupons from the government.< Where were all those manufacturers located? I'd place; /archives//html/Amps/2013-08/msg00036.html (7,028 bytes)

Current List: 41 - 60
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]