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1. [Amps] resonant filter tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 14 May 2007 10:21:25 -0600; This was all discussed here in the late 1990s, (see archive) but i will repeat as there are probably a few different hams reading and contributing since then. Resonant elements in power supply filter; /archives//html/Amps/2007-05/msg00130.html (12,317 bytes)
2. [Amps] UTC S50 XFMR tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 9 May 2007 12:26:50 -0600; Bill Yours is the same as the S50 in catalog, just terminal arrangement and marking are different. Plus the taps on the primary, for low line voltage, high line voltage, probably. The two 5000 V post; /archives//html/Amps/2007-05/msg00091.html (10,091 bytes)
3. [Amps] RFI experiences TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 2 May 2007 10:59:23 -0600; Thats a great one, Kim. I have had a few bouts of RFI problems, not so dramatic though. In high school I had this tesla coil I built, out in my parents old garage/shed. I ran the wiring myself to tha; /archives//html/Amps/2007-05/msg00023.html (7,573 bytes)
4. [Amps] tetrode vs triode in GG amp TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Thu, 26 Apr 2007 16:54:26 -0600; Sometimes its availability. I am replacing a GG triode amplifier used at 200 MHz, with a GG tetrode amplifier. The triode is run near the limit of plate dissipation and was designed 50 years ago. The; /archives//html/Amps/2007-04/msg00328.html (7,408 bytes)
5. [Amps] Flash over in 3-500Z tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 23 Apr 2007 13:18:51 -0600; I wanted to add to Manfred's comment. I have noticed that if you severely overload a tube, it may flash over from the evolution of gas also. The gas is, in this case, evolving from overheated element; /archives//html/Amps/2007-04/msg00236.html (10,428 bytes)
6. [Amps] ceramic capacitor specs. tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 17 Apr 2007 13:42:06 -0600; I don't believe CRL is making them now, but High Energy and Jennings both seem to have comparable procucts to 857, 858, etc, so I would suggest using their information on current vs frequency. The ce; /archives//html/Amps/2007-04/msg00180.html (7,672 bytes)
7. [Amps] 3-400Z zsac tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Fri, 16 Mar 2007 13:02:10 -0600; Hi Gary You can look it up on the tube constant current curves in the datasheet. That should be available online somewhere. Depending on your Grid or Cathode Bias voltage, pick off the closed anode c; /archives//html/Amps/2007-03/msg00180.html (7,617 bytes)
8. [Amps] winding conductors on edge into inductances TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 27 Feb 2007 10:18:12 -0700; I am going to make a guess for this, when you use tooling on a rotating cylinder of raw stock, a spiral of metal comes off, in the shape of a coil. If you do this with a propertly set up lathe, you; /archives//html/Amps/2007-02/msg00403.html (7,603 bytes)
9. [Amps] Edgewound inductor mfrs tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 26 Feb 2007 10:32:03 -0700; Cardwell sells the old Multronics designs: http://www.cardwellcondenser.com/PAGES/md04.html Kintronic Labs has their own designs also, but not edgewound, tubing instead: http://www.kintronic.com/sit; /archives//html/Amps/2007-02/msg00392.html (7,662 bytes)
10. [Amps] power combiners tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 20 Feb 2007 13:27:28 -0700; http://www.werlatone.com/index.cfm?area=1&pageid=1 _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2007-02/msg00320.html (6,977 bytes)
11. [Amps] Seimens SVP tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Thu, 15 Feb 2007 11:56:11 -0700; Jim My old Seimens datasheet shows that to be 145 VDC +/- 20% breakdown, <750 V impulse breakdown (100 V/us impulse) and <1100 V impulse breakdown (10,000V/us risetime impulse). It can handle 5000 am; /archives//html/Amps/2007-02/msg00250.html (7,805 bytes)
12. [Amps] Tubes <==> Neat? tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Thu, 15 Feb 2007 11:46:59 -0700; Kim I dunno about tubes being neat anymore, they are sort of a dead end for a career path, unless you specialize in an area where they are still in wide use, such as super power RF for particle accel; /archives//html/Amps/2007-02/msg00249.html (9,522 bytes)
13. [Amps] Incandescent and tube filaments tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 14 Feb 2007 12:18:38 -0700; One thing to consider when comparing these, is that the filament in a lamp is lit to incandescence, higher temperature, than the filament in a TT or oxide cathode filament. These are typically less t; /archives//html/Amps/2007-02/msg00245.html (7,253 bytes)
14. Re: [Amps] Thoriated tungsten lifetime when idling tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Fri, 9 Feb 2007 18:05:29 -0700; Tom, You are correct, for Eimac its normally stated as limit the current to 2 x the operating current on turnon. I was guessing conservatively. I checked and the same thing applies with the larger tu; /archives//html/Amps/2007-02/msg00172.html (11,262 bytes)
15. [Amps] Thoriated tungsten lifetime when idling tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Fri, 9 Feb 2007 12:32:56 -0700; Larry and all, Eimac typically says 150% of normal current, I believe, for TT filaments. Most big toobes use either a ramped up variac or power supply, or a current limited transformer that has a gap; /archives//html/Amps/2007-02/msg00165.html (9,988 bytes)
16. [Amps] resistor tspa (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Thu, 8 Feb 2007 13:05:46 -0700; John, Nice call. You can find noninductive high voltage resistors from Caddock and EBE, but they aren't really noninductive to higher frequencies. Ditto for Dale. However, you can get real noninducti; /archives//html/Amps/2007-02/msg00137.html (8,242 bytes)
17. [Amps] vapor phase cooling and old discussion revived - rambles TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 7 Feb 2007 09:57:23 -0700; Hi I have been dealing 'mostly' with water and vapor-phase cooled tubes since I left FM broadcast transmitter design 22 yrs ago. But I don't consider myself in the same league of experts as those ham; /archives//html/Amps/2007-02/msg00120.html (10,392 bytes)
18. [Amps] DI water explaination TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 6 Feb 2007 15:04:57 -0700; Paul (below) is correct that Altronics loads (and Bird) are thin film resistive elements on a core, with water flushing by them. There is not requirement for super low conductance water in them, as t; /archives//html/Amps/2007-02/msg00099.html (14,623 bytes)
19. Re: [Amps] WATER for vapor cooled amplifier TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 6 Feb 2007 10:53:15 -0700; You could do a simple test with a megger or a high pot tester and some plastic pipe, inject some current and see, through a couple of metallic fittings. But it won't be calibrated against any standar; /archives//html/Amps/2007-02/msg00088.html (10,107 bytes)
20. [Amps] WATER for vapor cooled amplifier TSPA (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 6 Feb 2007 10:03:08 -0700; Paul Deionized water is what you have to use for high resistivity water. Distilled is not acceptable as the ionic content is now low enough. DI is made by either using distilled or well filtered wate; /archives//html/Amps/2007-02/msg00080.html (8,616 bytes)

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