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21. [AMPS] HV Pole Pigs ++ (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 20 Dec 2001 17:53:50 -0500; Not a bad point Jack. Ultimately most of the pigs are removed from the can when used for amateur service. I don't know about the standards in the US but here in Canada, these pole transformers had to; /archives//html/Amps/2001-12/msg00409.html (11,438 bytes)
22. [AMPS] HV Pole Pigs ++ (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 20 Dec 2001 20:36:40 -0500; Well the pole pigs I have aren't that big. Mine are all either 5 or 10 KVA, perhaps the occasional 3 KVA unit. But these are disappearing quickly. With upgrades to the distribution system around here; /archives//html/Amps/2001-12/msg00417.html (13,685 bytes)
23. [AMPS] Noises in electrolytic capacitors (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Tue, 02 Oct 2001 10:02:04 -0400; Thinking back a number of years, I had exactly the same experience with the equalizers in my Viewstar amp. Two of them were open, with absolutely no visual evidence that anything was wrong. These wer; /archives//html/Amps/2001-10/msg00015.html (10,529 bytes)
24. [AMPS] Noises in electrolytic capacitors (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Wed, 03 Oct 2001 17:47:02 -0400; These were all new parts when built Tom. Ohmite Brown Devils are still made. They're hollow core, wire-wound, glazed enamel. Physically, nice well made looking resistors. But that didn't seem to prev; /archives//html/Amps/2001-10/msg00058.html (9,406 bytes)
25. [AMPS] Finding the Q of a Coil (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 07 Oct 2001 08:50:48 -0400; Accurate calculation of RF resistance definitely is the tough part. There is more than one set of formulas from different sources for calculating this and the results don't agree. If I were forced to; /archives//html/Amps/2001-10/msg00139.html (8,805 bytes)
26. [AMPS] Hand in pocket test (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 13 Oct 2001 10:53:03 -0400; --==_1062495==_.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed I hope this is "tongue-in-cheek". For the less experienced members reading the list, the following procedure (posted be; /archives//html/Amps/2001-10/msg00322.html (9,416 bytes)
27. [AMPS] SB-221 High Voltage Transformer (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 13 Oct 2001 20:12:52 -0400; Here's Gary's URL. Click on the "Transformer Rewinding" link near the top of the page. http://tubes_tubes_tubes.tripod.com/tubestubestubes/ Phil -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2001-10/msg00327.html (8,066 bytes)
28. [AMPS] Cleaning aluminum variable capacitors (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Mon, 22 Oct 2001 09:00:12 -0400; I use a loose-knit buffing wheel on a motor to do this. It's a bit of work but after buffing every plate and part, the result was a mirror finish. I lightly loaded the buffing wheel with a whitish bu; /archives//html/Amps/2001-10/msg00424.html (8,583 bytes)
29. [AMPS] RE: 3-500z cooling (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Fri, 28 Sep 2001 19:54:44 -0400; No, it was the technically correct way to do it. The tubes could be put into continuous service in some application (drivers for an AM broadcast transmitter for example) at 100% duty cycle, hence pro; /archives//html/Amps/2001-09/msg00490.html (8,854 bytes)
30. [AMPS] RE: 3-500z cooling (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 29 Sep 2001 10:51:39 -0400; Understood Tom. I really didn't express my point very well with my first post. There's no question that as long as air flow maintains proper envelope and seal temperatures, it doesn't matter how the; /archives//html/Amps/2001-09/msg00517.html (10,303 bytes)
31. [AMPS] QRP (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 16 Aug 2001 23:31:08 -0400; An interesting point of view Tom and somewhat justifiable. However you may have missed the "spirit" of QRP. The thrill for *most* QRP'ers is not necessarily the fact that *they* worked the other guy,; /archives//html/Amps/2001-08/msg00178.html (11,022 bytes)
32. [AMPS] QRP (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Fri, 17 Aug 2001 19:00:41 -0400; Sorry Mauri - I guess QRP is relative. I was referring to QRP in the true sense - 5 watts or less, usually with simple wire antennas. From your question I realize that we sometimes also call 100 watt; /archives//html/Amps/2001-08/msg00207.html (13,362 bytes)
33. [AMPS] QRP (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Fri, 17 Aug 2001 19:04:11 -0400; You're absolutely right Tom, no argument. I'd never thought of it that way until your original post. My point was just a different view of the whole thing. But I do agree with you. Thanks...Phil -- F; /archives//html/Amps/2001-08/msg00208.html (9,648 bytes)
34. [AMPS] Re: AMPS] Looking for spares for AMP Supply LK500NTC (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 25 Aug 2001 22:21:04 -0400; According to one of the guitar amp experts (and he's quite knowledgeable), some of the best audio power tubes ever produced came out of the Pro-Comm factory in Korea. Apparently they are extremely we; /archives//html/Amps/2001-08/msg00328.html (8,657 bytes)
35. [AMPS] Making tubes (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 05 Jul 2001 13:08:59 -0400; Virtually impractical to do in a home setting Billy. Not impossible, but largely impractical. The cleaniness requirements are high and the equipment needed to produce a hard vacuum is expensive. And; /archives//html/Amps/2001-07/msg00059.html (8,136 bytes)
36. [AMPS] Making tubes (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Thu, 05 Jul 2001 15:39:57 -0400; No question - with a glass blower and related equipment, oil bath vacuum pumps. And they weren't very good by today's standards, but they did quite well with what they had. Remember, the point of the; /archives//html/Amps/2001-07/msg00063.html (9,803 bytes)
37. [AMPS] Re: Spud Gun Info? (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Fri, 06 Jul 2001 08:42:00 -0400; Here's a few Mike : http://www.xinventions.com/main/spud/home.htm http://www.goldmann.com/spudgun.html http://www.goldmann.com/spudgun/build_one.html http://www.marcogliese.org/spud/projectiles.html; /archives//html/Amps/2001-07/msg00079.html (7,242 bytes)
38. [AMPS] Electrolytic shelf life (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Mon, 09 Jul 2001 13:29:49 -0400; I agree with Rich's comments John. I have 1998 catalogs from Philips and Mallory so I can add a little more. Mallory recommends testing the DC leakage current after 5 years storage. Philips recommend; /archives//html/Amps/2001-07/msg00119.html (9,063 bytes)
39. [AMPS] Oil Filled Capacitors (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Wed, 11 Jul 2001 20:42:11 -0400; There isn't anything new here regarding these caps for HV filters : they've been used by amateurs for years. There are several home brew amps around here that have used these caps without incidence s; /archives//html/Amps/2001-07/msg00152.html (10,714 bytes)
40. [AMPS] construction of parasitics (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sun, 22 Jul 2001 09:45:15 -0400; So, under fault conditions the ceramic ("cement") resistors are known to be prone to arcing/explosion/etc whereas the glass coated resistors are not ? (or are less prone ?) Tnx....Phil -- FAQ on WWW:; /archives//html/Amps/2001-07/msg00266.html (10,116 bytes)

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