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61. Re: [Amps] IM distortion and such (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 27 Jun 2006 13:31:08 -0700; I have seen no info from Eimac on Class B for the 3-500Z. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lis; /archives//html/Amps/2006-06/msg00529.html (11,849 bytes)
62. Re: [Amps] IM distortion and such (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Tue, 27 Jun 2006 16:58:08 -0400; Ok, I went and pulled my Eimac book down. I hadn't earlier where it was at as I couldn't hardly reach it from my wheelchair. I guess I need shorter book shelves : ) Anyhow, this one does have the Cla; /archives//html/Amps/2006-06/msg00531.html (14,014 bytes)
63. Re: [Amps] IM distortion and such (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Tue, 27 Jun 2006 19:54:41 -0400; Tony, Thanks as mine is a little different than this one (1973 version), as yours shows the driving power. The one in my manual does not. The link was from another poster on here, I was merely refere; /archives//html/Amps/2006-06/msg00536.html (16,371 bytes)
64. Re: [Amps] IM distortion and such (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Tue, 27 Jun 2006 21:50:49 -0400; Rich, I caught that too as class B should be cut off or like you said, ZSAC = 0. I think Tony said that sheet was from 1968. My manual sheets are from 1973, or at least the one on the 3-500Z. Tony e-; /archives//html/Amps/2006-06/msg00537.html (14,818 bytes)
65. Re: [Amps] IM distortion and such (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 27 Jun 2006 18:35:41 -0700; Will -- The stated ZSAC is 65mA. With Class B, ZSAC is zero mA. With Class AB there's some ZSAC, and with AB2 it means there's ZSAC as well as grid-current during signal conditions. Whoever wrote thi; /archives//html/Amps/2006-06/msg00539.html (13,308 bytes)
66. Re: [Amps] IM distortion and such (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Tue, 27 Jun 2006 23:08:26 -0400; Not true. Even a curved line does not necessarily produce IM3 or IM5. (harmful IM3 is 2 * F1 - F2, or 2*F2-F1, IM5 is 3*F1-2*F2, 3*F2-2*F1 and so on through all odd-order products). There were two po; /archives//html/Amps/2006-06/msg00540.html (12,708 bytes)
67. Re: [Amps] IM distortion and such (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Wed, 28 Jun 2006 07:12:52 +0200 (CEST); IM3 or IM5. (harmful IM3 is 2 * F1 - F2, or 2*F2-F1, IM5 is 3*F1-2*F2, 3*F2-2*F1 and so on through all odd-order products).< If it's a square law curve, for example, there are NO third order products; /archives//html/Amps/2006-06/msg00542.html (9,138 bytes)
68. Re: [Amps] IM distortion and such (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Wed, 28 Jun 2006 01:06:56 -0500; "This word means exactly what I intend it to mean, neither more, nor less" The Queen of Hearts Give it up Tom and welcome back. 73, Sam, W5LU _______________________________________________ Amps mail; /archives//html/Amps/2006-06/msg00543.html (9,092 bytes)
69. Re: [Amps] IM distortion and such (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 28 Jun 2006 06:23:36 -0400; Unfortunately Rich even if **you** don't believe what nearly every good electrical engineer in the world knows to be a fact, including all the people at Eimac who design tubes, it does not change an; /archives//html/Amps/2006-06/msg00544.html (10,120 bytes)
70. Re: [Amps] IM distortion and such (score: 1): Author: "Kenneth D. Grimm, K4XL" <kgrimm@adelphia.net>; Date: Wed, 28 Jun 2006 07:23:17 -0400; As I recall, it was an attempt to fill a gap between the bigger and more expensive Eimac offerings and the 811A offered by everyone. Also, if I remember correctly, it was specifically created as an a; /archives//html/Amps/2006-06/msg00545.html (9,184 bytes)
71. Re: [Amps] IM distortion and such (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Wed, 28 Jun 2006 14:30:38 +0200 (CEST); expensive Eimac offerings and the 811A offered by everyone. Also, if I remember correctly, it was specifically created as an amateur service tube as was the 3-1000Z. Interestingly enough, the 572B is; /archives//html/Amps/2006-06/msg00548.html (11,058 bytes)
72. Re: [Amps] IM distortion and such (score: 1): Author: "k7fm" <k7fm@teleport.com>; Date: Wed, 28 Jun 2006 06:30:24 -0700; I recall that QST had an article on a 2 tube amplifier using the UE572 tube that was made for hams. I think the article was about 1957 or so. Gee, the years seem to melt together. The front panel had; /archives//html/Amps/2006-06/msg00555.html (8,522 bytes)
73. Re: [Amps] IM distortion and such (score: 1): Author: R L Measures <r@somis.org>; Date: Wed, 28 Jun 2006 02:05:16 -0700; RE: A curved line: Since the slope of the line is constantly changing, it means that the transfer characteristic is too, and that means it's making most all types of doo-doo. No sale. Changing slope; /archives//html/Amps/2006-06/msg00559.html (15,102 bytes)
74. Re: [Amps] IM distortion and such (score: 1): Author: R L Measures <r@somis.org>; Date: Wed, 28 Jun 2006 02:16:09 -0700; RE: constant current curves: I do not believe that a constantly changing slope (i. e., a curved line) has this magical ability. . How would the manufacturer determine how much peak current had ever b; /archives//html/Amps/2006-06/msg00560.html (9,235 bytes)
75. Re: [Amps] IM distortion and such (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Wed, 28 Jun 2006 07:20:09 -0700; Yes, definitely, Peter. I recall an IEEE talk on Gallium Nitride amplifier technology that I attended about 6 months ago where the presenter showed several IMD curves for class B amplifiers that had; /archives//html/Amps/2006-06/msg00562.html (9,629 bytes)
76. Re: [Amps] IM distortion and such (score: 1): Author: Gudguyham@aol.com; Date: Wed, 28 Jun 2006 11:02:19 EDT; BTW, TWTA linearizers actually exploit this phenomenon to reduce overall IMD. Sometimes two wrongs do make a right :) 73, Mike W4EF I think this whole thread started out when a posted claimed that he; /archives//html/Amps/2006-06/msg00567.html (10,084 bytes)
77. Re: [Amps] IM distortion and such (score: 1): Author: "Joe Subich, W4TV" <w4tv@subich.com>; Date: Wed, 28 Jun 2006 11:02:36 -0400; This is a complete canard. Amplifiers do not operate along the constant current curves. They operate along a "load line" that starts at the zero drive condition for grid to cathode voltage and plate; /archives//html/Amps/2006-06/msg00568.html (11,809 bytes)
78. Re: [Amps] IM distortion and such (score: 1): Author: Gudguyham@aol.com; Date: Wed, 28 Jun 2006 11:09:13 EDT; By properly loading the amplifier, voltages (including VHF transients) in the output circuit would be reduced and the chance of damage to the bandswitch would be significantly reduced. 73, ... Joe, W; /archives//html/Amps/2006-06/msg00570.html (8,207 bytes)
79. Re: [Amps] IM distortion and such (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 28 Jun 2006 11:45:31 -0400; 73, Tom W8JI -- > guess the question is Why does Amerritron say you can drive the tube with up to I don't remember how it would do at 130 watts drive. My ~20 year old AL1200 measures about -33dB PEP; /archives//html/Amps/2006-06/msg00574.html (9,067 bytes)
80. Re: [Amps] IM distortion and such (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 28 Jun 2006 11:46:24 -0400; No, that's totally false. 73 Tom _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-06/msg00575.html (8,379 bytes)

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