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81. [Amps] pandoras parasites (score: 1): Author: 2@vc.net (Rich); Date: Thu, 7 Nov 2002 08:00:19 -0800; ** Since the cathode is the destination of the feedback-C in g-g configuration, adding a vhf-damper to gnd from each filament pin makes sense since the cathode is where regen must begin. For a 3cx12; /archives//html/Amps/2002-11/msg00099.html (7,485 bytes)
82. [Amps] RMS-PEP & 2x8877 (score: 1): Author: 2@vc.net (Rich); Date: Thu, 7 Nov 2002 08:00:19 -0800; ** PEP is the finite RMS power at the max peak output. Thus 1kW PEP = 2kW peak. - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00100.html (8,539 bytes)
83. [Amps] 4-400A Plate (score: 1): Author: 2@vc.net (Rich); Date: Fri, 8 Nov 2002 06:00:49 -0800; My experience is that c. 3500Vdc is needed on ssb to produce the needed ZSAC (75mA) with 0V bias. - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00121.html (8,667 bytes)
84. [Amps] 4-400A Plate (score: 1): Author: 2@vc.net (Rich); Date: Fri, 8 Nov 2002 06:12:37 -0800; ** Indeed, and it produces the same peak-emission as a 3-400, 3-500 and 4-400. Another good light show can be produced by the 8281/4cx15,000A. When a clear plastic chimney is used, electrons strikin; /archives//html/Amps/2002-11/msg00122.html (9,976 bytes)
85. [Amps] 4-400A Plate (score: 1): Author: 2@vc.net (Rich); Date: Fri, 8 Nov 2002 07:24:28 -0800; Any triode will run in g-g. The higher the Mu, the less cathode driving V needed. A 250TH is easier to drive in g-g than a 250TL. The "you can't" is running a high or medium Mu triode in grid-driven; /archives//html/Amps/2002-11/msg00127.html (8,850 bytes)
86. [Amps] Big bang (score: 1): Author: 2@vc.net (Rich); Date: Fri, 8 Nov 2002 16:54:02 -0800; ** 4. None of the above. - Why? The HV bypass C - 2000pF - is only about half of what is needed to protect C3 from RF on 160m. Fix: Replace C3 and add C in parallel with the 2000pF. - An article on; /archives//html/Amps/2002-11/msg00139.html (7,392 bytes)
87. [Amps] Potting HV Transformers! (score: 1): Author: 2@vc.net (Rich); Date: Sat, 9 Nov 2002 02:59:22 -0800; homebrew potting transformers is discussed on my Web site in "Amplifiers". - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00145.html (7,054 bytes)
88. [Amps] Henry 2KD Classic (score: 1): Author: 2@vc.net (Rich); Date: Sat, 9 Nov 2002 02:59:22 -0800; You are not driving the tubes enough. Either your SWR is not low enough to allow the radio to develop full output, or you don't have the needed 130w drive. To make the SWR low enough, it takes a tun; /archives//html/Amps/2002-11/msg00146.html (8,375 bytes)
89. [Amps] Power ratings N/BNC/SO239? (score: 1): Author: 2@vc.net (Rich); Date: Sun, 10 Nov 2002 06:29:19 -0800; This depends on the mode and frequency. SSB causes considerably less I^2 x R heating in conductors than RTTY. For years, when jammed, I ran 14 on 40m with Type-N connectors, sans-grief. By accident,; /archives//html/Amps/2002-11/msg00154.html (7,930 bytes)
90. [Amps] Henry 2KD Classic (score: 1): Author: 2@vc.net (Rich); Date: Sun, 10 Nov 2002 06:29:19 -0800; ** Re-Design the tuned input circuits for a Q of 2 - 3. A Q of less than that is ok with tube-type radios, but not solid-state radios. S-S radios need an SWR of /,1.2 - 1. - Henry Radio amp-design i; /archives//html/Amps/2002-11/msg00155.html (9,954 bytes)
91. [Amps] 4-400A Plate (score: 1): Author: 2@vc.net (Rich); Date: Mon, 11 Nov 2002 08:21:33 -0800; Infrared energy radiates in the room and not from the antenna. During the Winter, this is not wasteful. - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00178.html (9,003 bytes)
92. [Amps] 4-400A Plate (score: 1): Author: 2@vc.net (Rich); Date: Mon, 11 Nov 2002 12:18:22 -0800; A 5-125B tantalum plate/anode weighs around 0.008 lb -- which is about one USD. - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00182.html (7,827 bytes)
93. [Amps] transformers (score: 1): Author: 2@vc.net (Rich); Date: Tue, 12 Nov 2002 05:08:46 -0800; Plymouth Rubber Co self-adheering silicone-rubber tape works better. Want a free sample? - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00186.html (6,669 bytes)
94. [Amps] 6m (score: 1): Author: 2@vc.net (Rich); Date: Wed, 13 Nov 2002 02:26:20 -0800; Mark -- When I was running a tetrode with handles [putting out 14k] on 40m to thwart the jammers, a number of people wrote to the FCC and complained. Many of them were big-gun contesters who ran a t; /archives//html/Amps/2002-11/msg00198.html (8,646 bytes)
95. [Amps] 6m (score: 1): Author: 2@vc.net (Rich); Date: Wed, 13 Nov 2002 07:42:19 -0800; No damage was done to anyone. It confirmed what I had begun to suspect about big-guns -- that contesting is like shooting craps with guys who are known to use loaded dice. - Rich..., 805.386.3734, ww; /archives//html/Amps/2002-11/msg00207.html (9,906 bytes)
96. [Amps] 6m (score: 1): Author: 2@vc.net (Rich); Date: Wed, 13 Nov 2002 07:42:19 -0800; It was c. 1981. They didn't contact me or inspect my station. The odds of them catching me doing 14k were small since about the only times I ran it was when the jammers were active, which was maybe; /archives//html/Amps/2002-11/msg00208.html (7,723 bytes)
97. [Amps] 6m (score: 1): Author: 2@vc.net (Rich); Date: Wed, 13 Nov 2002 08:02:08 -0800; No ** With a calibrated pep wattmeter and a 50-ohm termination, it was do-able -- provided they could convince me to turn up the mic gain. The ultimate fly in the ointment was the FCC trying to expl; /archives//html/Amps/2002-11/msg00209.html (7,734 bytes)
98. [Amps] SB220 T/R relay substitution (score: 1): Author: 2@vc.net (Rich); Date: Thu, 14 Nov 2002 10:20:28 -0800; ** To prevent hotswitching with QSK-radios, it takes <3mS relays. - Rich..., 805.386.3734, www.vcnet.com/measures.; /archives//html/Amps/2002-11/msg00225.html (8,504 bytes)
99. [Amps] Hot Switching (score: 1): Author: 2@vc.net (Rich); Date: Fri, 15 Nov 2002 00:18:12 -0800; ** In modern radios, R/T speed is the same whether one uses VOX, PTT, or the SEND switch. Typical R/T & T/R switch time is currently 5 - 7mS. In SSB or AM mode, after the R/T switch time, whatever so; /archives//html/Amps/2002-11/msg00237.html (8,599 bytes)
100. [Amps] Output Safety Choke Value (score: 1): Author: 2@vc.net (Rich); Date: Fri, 15 Nov 2002 00:42:18 -0800; 50uH has the advantage of no resonances below c. 40MHz. 2.5mH has a plethora of resonances from 1,8 - 30 MHz. For the tetrode amplifier shown on my Website, I used three 500V resistors in series to b; /archives//html/Amps/2002-11/msg00238.html (8,106 bytes)

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