Mail Archive Search: <+from:na9d@speakeasy.net>

Results:

References: [ +from:na9d@speakeasy.net: 73 ]

Total 73 documents matching your query.

61. [AMPS] Expulsion policy on AMPS (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Thu, 24 May 2001 21:35:25 -0500; The "board" is the reflector. They are synonyms, Rich. Board is short for "bulletin board" as in the electronic kind. Secondly, a computer that someone has to pay for is hosting the Majordomo list pr; /archives//html/Amps/2001-05/msg00415.html (14,361 bytes)
62. [AMPS] Input impedance (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Thu, 24 May 2001 23:11:11 -0500; I think there is generally a driving impedance specified by the tube data. At least this is where I have gotten mine from. Bill Orr's book has a table of various tubes with the drive impedance specif; /archives//html/Amps/2001-05/msg00420.html (8,535 bytes)
63. [AMPS] Pin Diode Information from Microsemi (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Fri, 25 May 2001 00:06:32 -0500; For those that don't know, Micro-Semi is the remnants of the old Unitrode. Their high power PINs are EXCELLENT. 73, Jon NA9D -- Jon Ogden NA9D (ex: KE9NA) Member: ARRL, AMSAT, DXCC, NRA http://www.qs; /archives//html/Amps/2001-05/msg00422.html (8,291 bytes)
64. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Fri, 25 May 2001 18:31:37 -0500; What do you mean "doesn't the source have to be a transmission line?" A series C can indeed do what you say. However, a true series C does not dissipate energy but stores it. I was speaking in terms; /archives//html/Amps/2001-05/msg00435.html (9,933 bytes)
65. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Sat, 26 May 2001 08:22:43 -0500; Billy, Take a look at a filter plot of both S21 and S11. I can send some to you if you need any since I sell them. At frequencies outside the passband of the filter, S11 is high. A filter is a REFLEC; /archives//html/Amps/2001-05/msg00443.html (14,380 bytes)
66. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Sat, 26 May 2001 08:26:34 -0500; A CAPACITOR IS NOT A DISSIPATIVE DEVICE!! Period. Any heat generated in the device is caused by losses that are real world and are the electrical equivalent of friction. There is some parasitic resis; /archives//html/Amps/2001-05/msg00444.html (10,338 bytes)
67. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Sat, 26 May 2001 08:34:40 -0500; S-Parameters can be used and applied to any n port device. If our box is a transmitter, it will only have one port. Therefore, the only S parameter we can measure is S11. You don't have to have a tra; /archives//html/Amps/2001-05/msg00445.html (11,100 bytes)
68. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Sun, 27 May 2001 00:26:52 -0500; I think that's what he's saying, Rich. As the output RF waveform varies over time, the resistance (or a better term is impedance) of the source will vary over time as well. 73, Jon NA9D -- Jon Ogden; /archives//html/Amps/2001-05/msg00453.html (9,872 bytes)
69. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Sun, 27 May 2001 07:55:52 -0500; Ahh, but Ian, it has been shown that calculation of efficiency using a Thevenin source and calculation of efficiency using a Norton source does not give the same answer. Therefore, since Norton and T; /archives//html/Amps/2001-05/msg00456.html (10,812 bytes)
70. [AMPS] PA-77 musings (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Tue, 29 May 2001 07:07:51 -0500; Rich's switching circuitry works absolutely outstandingly well! Your vacuum variable in the amp is probably sufficient or better than an RJ1-A. One minor correction that I would add to Rich's circuit; /archives//html/Amps/2001-05/msg00488.html (8,739 bytes)
71. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Tue, 29 May 2001 07:17:11 -0500; I discovered a very apparent reason why this is so. I was cruising through my 1987 ARRL handbook the other day (yes, I have a newer one, but I am more familiar with the old one). In the PA section, i; /archives//html/Amps/2001-05/msg00489.html (10,470 bytes)
72. [AMPS] Conjugate Matching and Efficiency (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Wed, 30 May 2001 07:11:06 -0500; Apparently, then, George never saw any intermittent arcing. Cause if he did, every amp on the market would now be of a different construction. QST is still pretty tough on their advertisers. Until re; /archives//html/Amps/2001-05/msg00517.html (11,327 bytes)
73. [AMPS] Triton - Glass tubes ?? (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Sun, 29 Apr 2001 21:22:10 -0500; Yes, Rich, this is VERY true. Richardson is in my backyard. A friend works for an engineering company they own. They distribute some parts for me. They compete with me on others. They are well known; /archives//html/Amps/2001-04/msg00575.html (9,512 bytes)

Current List: 61 - 73
Page: [1] [2] [3] [4]