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21. [AMPS] Is screen potential important? (score: 1): Author: 2@vc.net (measures); Date: Thu, 30 Mar 2000 08:27:50 -0700; There were several versions. The screen bypass C should have equal charge and discharge time constants. // I do not want to charge/discharge the screen bypass. So shouting in the microphone could ac; /archives//html/Amps/2000-03/msg01084.html (10,100 bytes)
22. [AMPS] Is screen potential important? (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Thu, 30 Mar 2000 09:14:49 -0800; " With any tetrode, to obtain linear suds, one can vary the grid v. Or one can vary the screen v. -- but Not at the same time. In other words, When the grid potential varies, the screen potential mus; /archives//html/Amps/2000-03/msg01085.html (10,548 bytes)
23. [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)
24. [AMPS] Is screen potential important? (score: 1): Author: 2@vc.net (measures); Date: Thu, 30 Mar 2000 11:14:42 -0700; My guess is that it takes more than this. For an 8171 operating no lower than 3.5MHz, the screen/cathode capacitance is around 0.05uF. For 1.8MHz, around .iuF. Also, the input signal is a voice. Sin; /archives//html/Amps/2000-03/msg01090.html (9,611 bytes)
25. [AMPS] Is screen potential important? (score: 1): Author: 2@vc.net (measures); Date: Thu, 30 Mar 2000 12:14:00 -0700; It's not polite to shout. ok The 8171 is quite similar to the 4-125A, the 8973, and other tetrodes. . There is no certain screen voltage. This screen potential is always 1500v unless you need to mak; /archives//html/Amps/2000-03/msg01092.html (10,262 bytes)
26. [AMPS] Is screen potential important? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 31 Mar 2000 08:02:57 +0100; is around 0.05uF. For 1.8MHz, around .iuF Since when were we talking about 8171s? We have specifically been talking about the original G2DAF with a total of .007 microfarads. Even with .05 microfard,; /archives//html/Amps/2000-03/msg01096.html (9,273 bytes)
27. [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)
28. [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)
29. [AMPS] Is screen potential important? (score: 1): Author: 2@vc.net (measures); Date: Fri, 31 Mar 2000 12:08:14 -0700; << Also, the input signal is a voice. Since voice On a sustained AHHHH, the duty-cycle is around 35%. Sentences have a duty-cycle of roughly 15%. This is why so many ssb amplifiers get by with a fai; /archives//html/Amps/2000-03/msg01104.html (8,723 bytes)
30. [AMPS] Is screen potential important? (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 31 Mar 2000 14:42:56 -0600; average as u a by this, one plate/anode Harvey Fletcher, in his book, "Speech and Hearing in Communications" states that the range of intensity of the speech sounds may vary as much as 35 to 40 db f; /archives//html/Amps/2000-03/msg01105.html (9,566 bytes)

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