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41. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 06:54:22 +0000; To: <amps@contesting.com> Hi Peter, Two questions. Exactly how much change do you see in a tube. Let's take an 8877 for example? What parameters change so drastically? Two more questions. How did you; /archives//html/Amps/1998-05/msg00416.html (9,792 bytes)
42. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 06:54:22 +0000; To: <amps@contesting.com> Hi Rich, I've asked Eimac engineers if there is any merit to your claims, and they always say no. They say, once heat damage occurs, it is virtually impossible to determine; /archives//html/Amps/1998-05/msg00417.html (9,512 bytes)
43. [AMPS] Technical Question #1 (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 16:59:29 +0000; To: <amps@contesting.com> Hi Jon, Don't rely entirely on Mr. Orr's book. That is a collection of data from many sources, and it was never really peer reviewed. Many other books do describe neutraliza; /archives//html/Amps/1998-05/msg00449.html (10,717 bytes)
44. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 16:59:30 +0000; To: <amps@contesting.com> Hi Peter, I appreciate your reply. They don't change much Peter. Let me use a tube we recently have had gain variation in, the 3CX1200A7. When gain changes as little as 0.2; /archives//html/Amps/1998-05/msg00450.html (12,813 bytes)
45. [AMPS] Re: Parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 16:59:30 +0000; To: <amps@contesting.com> <snip> I might not have been clear enough Jon. I specifically stated the function of the device was to supply a signal source, and that is all. I believe I specifically stat; /archives//html/Amps/1998-05/msg00451.html (9,667 bytes)
46. [AMPS] Technical Question #1 (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 16:59:30 +0000; To: <amps@contesting.com> Yes. I certainly did say I saw what I thought was parasitic damage. I was very clear in staing it was from what I beleived could have been low frequency osscillations. I spe; /archives//html/Amps/1998-05/msg00452.html (10,102 bytes)
47. [AMPS] Technical Question #1 (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Thu, 21 May 1998 16:59:30 +0000; To: <amps@contesting.com> Hi Jon, Agreed what Jon? Let me make this very clear one last time. When I get to the first personal insult, I delete the post and don't read any more. I've stopped reading; /archives//html/Amps/1998-05/msg00453.html (9,783 bytes)
48. [AMPS] low out on 10m--clarification (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 22 May 1998 06:58:08 +0000; Ever try measuring power at the cathodes, by yanking the tubes and connecting a dummy load from the filament to ground and driving through the input system? 73, Tom W8JI w8ji.tom@MCIONE.com -- FAQ o; /archives//html/Amps/1998-05/msg00468.html (7,523 bytes)
49. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 22 May 1998 07:56:15 +0000; To: <amps@contesting.com> Actually the saturated emission current can be as high as 100 mA per watt at normal operating temperatures of 1900k (the section on Electron Emission, page 9-9, of Electroni; /archives//html/Amps/1998-05/msg00475.html (11,255 bytes)
50. [AMPS] low output on 10 (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 22 May 1998 09:06:45 +0000; To: <amps@contesting.com> While emission deterioration is the same across all frequencies, it is more noticable on frequencies where the system is on the edge of just having enough gain. 73, Tom W8JI; /archives//html/Amps/1998-05/msg00476.html (7,317 bytes)
51. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 22 May 1998 21:14:44 +0000; To: <amps@contesting.com> Hi Peter, I find it impossible to believe, since even 3000 voltage of positive grid voltage can't produce more than ten amperes! Sounds reasonable. Most textbooks seem to su; /archives//html/Amps/1998-05/msg00505.html (9,692 bytes)
52. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 22 May 1998 23:08:37 +0000; To: <amps@contesting.com> I posted the force levels about six months ago, when a discussion about filaments breaking from current and magnetic fields was posted. The worse case total force from filam; /archives//html/Amps/1998-05/msg00510.html (9,660 bytes)
53. [AMPS] Re: Neutralization 572Bs (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Fri, 22 May 1998 23:22:24 +0000; To: <amps@contesting.com> GM Martin, Phase shift is only 180 degrees when the pi- network has a very high Q. If the Q is the minimum to match the anode to the load, phase shift is 90 degrees. Normal; /archives//html/Amps/1998-05/msg00512.html (7,931 bytes)
54. [AMPS] Airflow (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sat, 23 May 1998 05:56:57 +0000; To: <amps@contesting.com> It is possible, and somtimes done. No problems. You just need a lot more airflow than conventional cooling. Eimac gives both specs in the data sheet. 73, Tom W8JI w8ji.tom@M; /archives//html/Amps/1998-05/msg00517.html (8,050 bytes)
55. [AMPS] where to find info (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sat, 23 May 1998 23:25:07 +0000; To: <amps@contesting.com> Hi Rich, The tube might forgive you, but you might not forgive it! 4-1000A's are notoriously unstable at high anode voltages, and getting a bit scarce. You will need about 5; /archives//html/Amps/1998-05/msg00532.html (8,456 bytes)
56. [AMPS] mystery xfmr (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sat, 23 May 1998 23:25:07 +0000; To: <amps@contesting.com> Not me. The AL-80B transformer is in that voltage range, and has nearly the same secondary resistance as your transformer. It sounds like you have about the same thing perfo; /archives//html/Amps/1998-05/msg00533.html (7,465 bytes)
57. [AMPS] where to find info (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sun, 24 May 1998 07:02:46 +0000; To: <amps@contesting.com> Hi Jon, Despite your questions about how to get your 4-1000 to work right on ten meters, you seem to suddenly now not have problems with performance. They absolutely are les; /archives//html/Amps/1998-05/msg00539.html (11,052 bytes)
58. [AMPS] parasitics (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sun, 24 May 1998 07:02:46 +0000; To: <amps@contesting.com> Triton does not sell 3-500's. They said they are too expensive to build. 73, Tom W8JI w8ji.tom@MCIONE.com -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: a; /archives//html/Amps/1998-05/msg00540.html (8,125 bytes)
59. [AMPS] Amplifier Experiments! (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sun, 24 May 1998 12:57:31 +0000; To: <amps@contesting.com> What is the inductance of the resistors? Can you measure it? Alternative solutions: 1.) You could have added capacitance in series with the resistors to reduce 10 meter curr; /archives//html/Amps/1998-05/msg00546.html (10,893 bytes)
60. [AMPS] where to find info (score: 1): Author: w8ji.tom@MCIONE.com (Tom Rauch); Date: Sun, 24 May 1998 12:57:32 +0000; To: <amps@contesting.com> Hi Jon, Most tetrodes are that way. Some fellow keeps trying to sell Ameritron on a G2DAF circuit, claiming it has "good and fully acceptable performance". He finally delive; /archives//html/Amps/1998-05/msg00547.html (10,281 bytes)

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