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81. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Sun, 26 Mar 2000 08:34:26 +0100; It doesn't wander. It follows the rf envelope. But screen voltage is set by rf (=grid) voltage. If +10 grid gives +1500 screen it won't suddenly or randomly give 500V screen instead. The time constan; /archives//html/Amps/2000-03/msg00952.html (9,341 bytes)
82. [AMPS] The G2DAF Amplifier; Intents and Purposes (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 27 Mar 2000 08:40:23 +0100; --Original Message-- From: measures <2@vc.net> To: Phil Clements <philk5pc@tyler.net>; Steve Thompson <rfamps@ic24.net>; AMPS <amps@contesting.com> To: <amps@contesting.com> Date: 26 March 2000 19:39; /archives//html/Amps/2000-03/msg00981.html (9,288 bytes)
83. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 27 Mar 2000 08:39:07 +0100; To: <amps@contesting.com> Like I said, it follows the *envelope* No, but neither can the rf drive from a SSB exciter go from zero to full in one cycle. The screen charging circuit can take the screen; /archives//html/Amps/2000-03/msg00982.html (13,377 bytes)
84. [AMPS] Re: New G2DAF amplifier information (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 27 Mar 2000 10:01:32 -0800; The comparison would be vey interesting, but just putting a DAF amp on the bench for some controlled tests would add massively to our knowledge. I have the space and equipment, but not the time to bu; /archives//html/Amps/2000-03/msg00984.html (9,249 bytes)
85. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 27 Mar 2000 22:35:26 +0100; snipped for brevity in Surely not in practice. There is some rise time in the envelope - during that time, the amplitude of the rf cycles gradually increases from zero to the intended level. The enve; /archives//html/Amps/2000-03/msg00990.html (11,690 bytes)
86. [AMPS] The G2DAF Amplifier; Intents and Purposes (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Mon, 27 Mar 2000 19:46:55 +0100; To: <amps@contesting.com> ¿Say what.? Section 2.2 of 'Care and feeding..' I don't have my copy to hand at this computer for the page reference, but you can find it on their web site version. I; /archives//html/Amps/2000-03/msg00991.html (9,504 bytes)
87. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Tue, 28 Mar 2000 08:53:59 +0100; snipped for brevity The envelope risetime of a SSB signal generated at 455kHz is different from one generated at 10.7MHz? If the risetime is different, is the bandwidth different? Steve -- FAQ on WWW; /archives//html/Amps/2000-03/msg00999.html (9,624 bytes)
88. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 29 Mar 2000 07:54:26 +0100; Now that we are charging the capacitor, why do you think that it cannot? What is a reasonable value for the source impedance of the rectifier. What is the time constant with 2000pF of screen capacito; /archives//html/Amps/2000-03/msg01031.html (10,123 bytes)
89. [AMPS] Northrup and the 3/2 law (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 29 Mar 2000 08:04:25 +0100; Which version of the 3/2 law, the linear one or the non-linear one? Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@; /archives//html/Amps/2000-03/msg01032.html (7,669 bytes)
90. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 29 Mar 2000 08:07:08 +0100; Perhaps he was generating his SSB at too high a frequency? Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contestin; /archives//html/Amps/2000-03/msg01033.html (9,957 bytes)
91. [AMPS] Northrup and the 3/2 law (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 29 Mar 2000 14:02:48 -0800; --Original Message-- From: G0MJW <mike@g0mjw.freeserve.co.uk> To: Steve Thompson <rfamps@ic24.net>; amps@contesting.com <amps@contesting.com> To: <amps@contesting.com> Date: 28 March 2000 23:22 Subje; /archives//html/Amps/2000-03/msg01055.html (7,496 bytes)
92. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 29 Mar 2000 14:12:35 -0800; --Original Message-- From: measures <2@vc.net> To: Peter Chadwick <Peter_Chadwick@mitel.com>; amps <amps@contesting.com>; 'Steve Thompson' <rfamps@ic24.net> To: <amps@contesting.com> Date: 29 March 2; /archives//html/Amps/2000-03/msg01056.html (9,242 bytes)
93. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Wed, 29 Mar 2000 14:30:36 -0800; snipped for brevity new I'm not disagreeing that regulated screen makes for good linearity, and I won't be surprised if the DAF system turns out to be relatively poor if I ever get the chance to do s; /archives//html/Amps/2000-03/msg01057.html (11,253 bytes)
94. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 30 Mar 2000 08:37:56 +0100; The experimental work that he did in the characterisation probably took more time and effort than building bias supplies. Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps; /archives//html/Amps/2000-03/msg01069.html (8,341 bytes)
95. [AMPS] test signals (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 30 Mar 2000 08:33:16 +0100; With two tones, it's better to vary the amplitude of both (together or spearately) but leave the frequency fixed, so that IMD products stay in the same place for measurement. The only problem will be; /archives//html/Amps/2000-03/msg01070.html (7,092 bytes)
96. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 30 Mar 2000 09:41:52 -0800; snipped for brevity new I'm not disagreeing that regulated screen makes for good linearity, and I won't be surprised if the DAF system turns out to be relatively poor if I ever get the chance to do s; /archives//html/Amps/2000-03/msg01074.html (10,805 bytes)
97. [AMPS] Tube data (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 30 Mar 2000 18:29:23 +0100; Is there anywhere I can find constant current curves for the 4-125? Thanks, Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-; /archives//html/Amps/2000-03/msg01086.html (6,572 bytes)
98. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Thu, 30 Mar 2000 18:20:53 +0100; 5uF upwards should be enough. Steve -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@co; /archives//html/Amps/2000-03/msg01087.html (9,133 bytes)
99. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Fri, 31 Mar 2000 08:41:20 +0100; Hang on - you repeatedly remind us that +ve grid voltage/grid current results in non-linear amplification in amps where screen voltage is fixed. The non-linearity can be fixed by varying the screen v; /archives//html/Amps/2000-03/msg01097.html (9,295 bytes)
100. [AMPS] Is screen potential important? (score: 1): Author: rfamps@ic24.net (Steve Thompson); Date: Fri, 31 Mar 2000 08:52:04 +0100; of Why guess, it's elementary maths. Work out how close to final voltage you get after 5 timeconstants. We've been through this. Something with that much screen C is not a good candidate for a DAF ty; /archives//html/Amps/2000-03/msg01098.html (9,563 bytes)

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