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241. [AMPS] Eimac 3CX1200D7 Component package (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 21 Dec 1999 08:53:46 -0700; not much if any. The advantage of the D7 is reduced feedback C. The Z7 is better yet. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissio; /archives//html/Amps/1999-12/msg00324.html (8,317 bytes)
242. [AMPS] BeO Cautions (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 21 Dec 1999 08:53:43 -0700; I handle it with my fingers, and so far no problems. The BeO demo was conducted in the Chemistry Department at the University of California, Berkeley. In a gloved box, a solid piece was scraped with; /archives//html/Amps/1999-12/msg00325.html (10,559 bytes)
243. [AMPS] BeO Cautions (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 21 Dec 1999 08:53:45 -0700; ? Amen. Ceramic insulation in ceramic/metal tubes is silver-soldered to the metal parts. The pink colour is from a bit of Manganese that is added to improve the wetablility of the ceramic RCA and Sv; /archives//html/Amps/1999-12/msg00326.html (8,912 bytes)
244. SV: [AMPS] More and More and More and More - drive derived screen potential (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 21 Dec 1999 15:12:36 -0700; ? You seemed to indicate that he was overly critical. Overcritical is usually an obfuscation of serious cracks in the foundation. . ? My impression is that it was His way or the highway. He was tryi; /archives//html/Amps/1999-12/msg00335.html (9,847 bytes)
245. [AMPS] Tuning a Pi-L tank circuit (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 21 Dec 1999 15:34:39 -0700; Make a graph of C1 vs. turns counter indication. Calculate the number of turns for a Q of 10 or so on each band and mark. Calculate the inductance required for each band. Measure L1 vs. turns counte; /archives//html/Amps/1999-12/msg00336.html (7,899 bytes)
246. [AMPS] Re: G2DAF (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 22 Dec 1999 04:22:30 -0700; Not bad, not bad. Recommended reading *The True Believer* - Eric Hoffer. cheers, John - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissio; /archives//html/Amps/1999-12/msg00342.html (7,068 bytes)
247. [AMPS] Measures Parasitic suppresor?/Tentec/Emtron (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 22 Dec 1999 05:30:22 -0700; Igor. -- Nickle-chromium is similar in appearance to tinned copper, even though the resistance is 50x higher. // I have doubts that Ten Tec would use a resistance-wire suppressor. To wit: When a Ten; /archives//html/Amps/1999-12/msg00343.html (8,062 bytes)
248. RE;[AMPS]Measures Parasitic Suppresors (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 22 Dec 1999 10:00:15 -0700; The suppressors are not resonant close to ten meters. . It would have. ? si, correcto. ? Psup increases as the square of the turns on Lsupp, so u gotta go easy. ? Clever. Safety wire is pretty close; /archives//html/Amps/1999-12/msg00346.html (7,791 bytes)
249. [AMPS] Fw: Two Tone Tests (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 23 Dec 1999 06:05:18 -0700; ? The question is How Much grid-current? 0.5Ma of grid-current is a whole nuther ballgame than 15mA of grid-current. . When I was measuring on-the-air distortion of the two, DAF amplifiers, I observ; /archives//html/Amps/1999-12/msg00356.html (9,187 bytes)
250. [AMPS] 2 TONE TESTS OF G2DAF CIRCUIT (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 23 Dec 1999 15:52:51 -0700; ? good point, Ian. Therein lies the sticky wicket. Hows about using a 100F screen bypass C in the DAF amp? Whistle it up and talk for ten minutes. - Rich..., 805.386.3734, www.vcnet.com/measures. --; /archives//html/Amps/1999-12/msg00371.html (10,275 bytes)
251. [AMPS] Plotting of screen voltage variation (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 23 Dec 1999 15:52:53 -0700; ? indeed. Are these Rich's words?. -- 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/1999-12/msg00372.html (7,820 bytes)
252. SV: [AMPS] daf on-air amplifier testing (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 27 Dec 1999 03:26:38 -0700; Norm's signal was not bad after he put fixed volts on the screens and stopped running grid current to the 4cx250Bs. All of the DAFs I heard produced more doo-doo than conventional amplifiers. I have; /archives//html/Amps/1999-12/msg00387.html (11,993 bytes)
253. SV: [AMPS] daf on-air amplifier testing (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 27 Dec 1999 03:26:39 -0700; I ran a 4cx250 for years on Class C telegraphy. Roughly 28mA of grid current is recommended by Eimac under typical operation. // Norm's DAF amplifier used less grid current. None of Norm's 4cx250 tu; /archives//html/Amps/1999-12/msg00388.html (8,221 bytes)
254. SV: SV: [AMPS] daf on-air amplifier testing (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 27 Dec 1999 07:13:09 -0700; The issue was grid current killing Norm's tubes. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrativ; /archives//html/Amps/1999-12/msg00390.html (8,153 bytes)
255. [AMPS] DAF-page updated... (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 30 Dec 1999 16:56:10 -0700; Can you accept the 3/2 power law?. cheers, Peter....... - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Admini; /archives//html/Amps/1999-12/msg00410.html (8,467 bytes)
256. SV: [AMPS] daf amplifier circuit, on air testing... (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 31 Dec 1999 05:02:09 -0700; ? Norm tried various time constant screen supply configurations. The one that produced acceptable distortion was a 350v shunt regulator. The 3/2 power rule is undoubtedly true. ? There were two DAF; /archives//html/Amps/1999-12/msg00415.html (11,720 bytes)
257. [AMPS] daf amplifier circuit, on air testing... (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 31 Dec 1999 05:10:08 -0700; I have never heard a G-G amplifier that had -22db total distortion. Hal's 2, 813 - DAF amp produced similar results. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contes; /archives//html/Amps/1999-12/msg00416.html (9,041 bytes)
258. [AMPS] daf amplifier circuit, on air testing... (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 31 Dec 1999 05:10:05 -0700; Skipp. Your attribution is bogus. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amp; /archives//html/Amps/1999-12/msg00417.html (13,410 bytes)
259. [AMPS] daf amplifier circuit, on air testing... (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 31 Dec 1999 08:06:03 -0700; ? The screen supply for the 2, 4CX250B amp in question required a string of a dozen 30v, 5w zeners tied to the cold end of the extant HV bleeder resistor. Total cost, under $10. cheers, Mike. - Rich; /archives//html/Amps/1999-12/msg00421.html (8,862 bytes)
260. [AMPS] daf amplifier circuit (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 31 Dec 1999 09:07:03 -0700; ? There has never been an amplifier that did not splatter in actual operation. The question is how much? ? the writing is on the wall. ? the 3/2 power law is too well established. ? The DAF amplifie; /archives//html/Amps/1999-12/msg00424.html (9,089 bytes)

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