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21. [Amps] RE: The Great Equalizer (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 23 Jul 2002 20:16:41 -0400; You guys are being a little unfair by thinking Alex does not like Ham radio. The ARRL's FCC report says Alex was called on the carpet by the FCC for operating on 20 meters with a technician class li; /archives//html/Amps/2002-07/msg00449.html (8,120 bytes)
22. [Amps] Muffin Fan on Swan Mark 1 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 24 Jul 2002 20:16:30 -0400; On 60Hz the EBM fan specified for that unit is fast enough to keep even the glass below 200C at rated dissipation, but only with the cover on. By the way, it is permissible to allow the envelope awa; /archives//html/Amps/2002-07/msg00468.html (9,348 bytes)
23. [Amps] Muffin Fans (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 24 Jul 2002 20:16:31 -0400; Why would it? There isn't a significant change in pressure or flow no matter which side it is on. An airplane propeller is an entirely different situation than an amplifier. 73, Tom W8JI W8JI@contes; /archives//html/Amps/2002-07/msg00469.html (7,498 bytes)
24. [Amps] Muffin Fan on Swan Mark 1 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 24 Jul 2002 20:16:29 -0400; It is really very simple. The market drives it firmly in that direction. The single largest complaint by far is amplifier noise. It dwarfs all other complaints, and nothing can be "too quiet". Build; /archives//html/Amps/2002-07/msg00470.html (8,576 bytes)
25. [Amps] questions (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 28 Jul 2002 12:08:33 -0400; This has already been answered. Temperature has a small effect on air volume because the density of a free volume of gas is proportional to the absolute temperate, not the fahrenheit or celsius scal; /archives//html/Amps/2002-07/msg00517.html (7,881 bytes)
26. [Amps] Pole Pig Question (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 30 Jul 2002 10:39:35 -0400; 3000V was never a standard primary line voltage. In the 50's there was 2200, in the 60's 4160V, and now virtually all are over 7200V. I'd run 5 or 10 volts into the 120 volt winding and measure the; /archives//html/Amps/2002-07/msg00540.html (6,574 bytes)
27. [Amps] choke resonances (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 30 Jun 2002 20:50:58 -0400; Someday when I have time I will put some amplifier stuff up on my web page, and testing chokes should be one of the more useful things. The gaps are there because those areas were "hot spots" where; /archives//html/Amps/2002-06/msg00001.html (8,278 bytes)
28. [Amps] TL-922 Revisited. (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 6 Jun 2002 06:01:14 -0400; Since parasitics don't cause tube problems, as a general rule, and especially since the stock 922 is stable, that change should make no difference. There are an abnormal amount of grid -filaments oc; /archives//html/Amps/2002-06/msg00038.html (10,430 bytes)
29. [Amps] Strange Problerm (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 7 Jun 2002 06:53:59 -0400; Whenever capacitors are changed, equalizing resistors should be tested. The dividing resistance should be tested AFTER the wiring is completed, because it is easy to damage many resistor types. You; /archives//html/Amps/2002-06/msg00048.html (8,414 bytes)
30. [Amps] electrolytic strings ++ (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 11 Jun 2002 10:39:43 -0400; In a series circuit, one fuse or one resistor is enough. One at the each component would do absolutely no good at all. The real problem with this suggestion, however, is that peak current in a capac; /archives//html/Amps/2002-06/msg00069.html (9,318 bytes)
31. [Amps] Looking for RF3A or RJ2B (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 13 Jun 2002 21:41:07 -0400; I'm looking for surplus RJ2B or RF3A relays, preferably with 24 volt coils. Anyone have any ideas where to find some?73, Tom W8JI W8JI@contesting.com; /archives//html/Amps/2002-06/msg00085.html (6,395 bytes)
32. [Amps] Solid state relay question++ (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 19 Jun 2002 17:37:43 -0400; It always takes more than a quick pulse of back EMF to blow a fuse. Even fast-acting low-current fuses require many cycles of 60Hz energy to fail, unless the overload is dozens of times the operatin; /archives//html/Amps/2002-06/msg00148.html (8,567 bytes)
33. [Amps] 8877 Max Grid Current (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 19 Jun 2002 17:37:37 -0400; David, I do have two programs that use constant current characteristics to calculate dissipation. They essentially agree with that, but of course HV, minimum anode voltage, and other parameters move; /archives//html/Amps/2002-06/msg00149.html (8,531 bytes)
34. [Amps] 8877 Max Grid Current (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 21 Jun 2002 23:55:52 -0400; There certainly is an effect, but it is small in the 8877. Virtually all of the dissipation in the control grid is caused by the kinetic energy of electrons striking the grid, just as occurs in the; /archives//html/Amps/2002-06/msg00183.html (9,317 bytes)
35. [Amps] re: CTI screen regulator, tubes vs solid state (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 23 Jun 2002 05:50:46 -0400; I just get a connection refused response from that URL.73, Tom W8JI W8JI@contesting.com; /archives//html/Amps/2002-06/msg00191.html (8,300 bytes)
36. [Amps] re: CTI screen regulator, tubes vs solid state (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 23 Jun 2002 21:34:01 -0400; The URL worked today, must have been a network problem. Look at this text........ Triodes are Good, Tetrodes are Better.... Unlike triode amplifiers, the PLA800 uses tetrode tubes, which have a contr; /archives//html/Amps/2002-06/msg00195.html (9,446 bytes)
37. [Amps] re: CTI screen regulator, tubes vs solid state (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 25 Jun 2002 06:51:02 -0400; Leaving things out that are needed, like heavy resistor swamping of the input or a lowpass tuned input, is just as poor design as overcomplicating a system to the point where the solution creates mo; /archives//html/Amps/2002-06/msg00207.html (8,644 bytes)
38. [Amps] CTI follow up (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 25 Jun 2002 06:51:03 -0400; Hmmm. If it is a crock of what he says, then the gas regulator must have low elasticity or the internal pressure buildup is too great. Fewer dinners at Del Taco will help. Why all the attention anyw; /archives//html/Amps/2002-06/msg00208.html (7,862 bytes)
39. [Amps] CTI follow up - miscellaneous ramblings (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 25 Jun 2002 20:50:06 -0400; I'm not so sure you looked all that carefully. Would you say it is "well built" without a control grid current meter to monitor the grid current? What about cathode matching? The 4CX250 is not that; /archives//html/Amps/2002-06/msg00222.html (10,094 bytes)
40. [Amps] Pi tanks vs Pi L + LOW PASS (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 28 Jun 2002 07:02:24 -0400; Having wrestled with this stuff to meet FCC TA guidelines, I've learned to watch the layout carefully. On paper the Pi-L looks a bit better, but in real life the actual layout is generally significa; /archives//html/Amps/2002-06/msg00253.html (10,299 bytes)

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