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21. Re: [Amps] GU-84B Cooling (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 20 Jul 2005 13:06:34 -0400; all you need is some thermal couple wire and a DVM Calibrate it in frozen water and boiling water and make a graph, To the list: In this thread is the mention of IR thermometers. As I fly r/c airplan; /archives//html/Amps/2005-07/msg00239.html (16,488 bytes)
22. Re: [Amps] Nuclear Magnetic Pulses (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 2 Aug 2005 09:16:15 -0400; DUCK AND COVER AH first grade in '57 Fold your hands over your head, tuck your head between your legs, and kiss your a** goodbye. Talk about flashbacks!!! 73, Pete ___________________________________; /archives//html/Amps/2005-08/msg00043.html (9,032 bytes)
23. Re: [Amps] Amps Digest, Vol 31, Issue 60 (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 2 Aug 2005 09:17:00 -0400; Yea but how will you operate the spark rig. PDM? I'm Unfortunately, you're probably right. John K5MO _______________________________________________ Amps mailing list Amps@contesting.com http://lists; /archives//html/Amps/2005-08/msg00044.html (8,946 bytes)
24. Re: [Amps] metal tape with conductive adhesive (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 9 Aug 2005 14:57:22 -0400; Try 3M we use a copper take in our EMI room to cover port holes. I'm looking for some metal tape with conductive adhesive, that could be used for closing a hole in a shield enclosure. Does anyone kno; /archives//html/Amps/2005-08/msg00350.html (7,607 bytes)
25. Re: [Amps] B and W FC15 filament choke (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 30 Aug 2005 11:46:59 -0400; Take a 100 ohm resistor and put it in series with the choke. Put the series combination across a signal generator. Now measure the RF voltage across the resistor and the choke with a scope. Scan down; /archives//html/Amps/2005-08/msg00760.html (8,019 bytes)
26. Re: [Amps] 4CX1500B (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 21 Sep 2005 08:24:48 -0400; 4CX1500B works great in a 30S1 which I think is the same configuration gfz This one may have been asked before.Over the past few years I have constructed a few amplifiers using pairs of 4CX250/350B t; /archives//html/Amps/2005-09/msg00259.html (8,254 bytes)
27. Re: [Amps] 4CX1500B (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Wed, 21 Sep 2005 08:48:57 -0400; OK you now have my attention since I drive the 4CX3000A. What happens to the resting current when the G1 is connected to the cathode. Also what happens to the gain compared to both grids at ground. M; /archives//html/Amps/2005-09/msg00261.html (7,874 bytes)
28. Re: [Amps] 4CX1500B (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 22 Sep 2005 10:26:06 -0400; You also need a good step attenuator in line with the second receiver input because most receiver S meters are bogus. The only one I have ever seen that has any kind of calibrated scale is a good wor; /archives//html/Amps/2005-09/msg00289.html (9,427 bytes)
29. Re: [Amps] 4CX1500B (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 22 Sep 2005 14:02:21 -0400; So both numbers will be bogus. S meters do not give accurate numbers in DB. You will only have better than worse than results with no standard as a reference. Ok, so we are using the same meter for b; /archives//html/Amps/2005-09/msg00292.html (11,306 bytes)
30. Re: [Amps] 4CX1500B (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 22 Sep 2005 14:04:45 -0400; This is the only accurate way to know the real number. With 0db attenuation, take the S meter reading at the adjacent frequency, tune to the fundamental frequency, add attenuation as needed to give t; /archives//html/Amps/2005-09/msg00294.html (11,319 bytes)
31. Re: [Amps] why not graphite anodes? (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 29 Sep 2005 15:03:40 -0400; Sept price In pulse service. 3-500Zs offer virtually no advantage over 3-400Zs. Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing lis; /archives//html/Amps/2005-09/msg00374.html (9,872 bytes)
32. Re: [Amps] Metron MA 1000b Misbehaving (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 10 Oct 2005 15:23:12 -0400; Noninductive metal film resistors can take a beating. I suspect you have a ground loop or loose connection. The amplifier input is not tuned so it should look like a passive load to the exciter. You; /archives//html/Amps/2005-10/msg00252.html (9,668 bytes)
33. Re: [Amps] amateur code (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 10 Oct 2005 16:58:35 -0400; New experts come aboard and rediscover things and take credit for inventing the wheel or po po The early ideas that made sense. 1926 Handbook: page 72. Here's what it says regarding building VHF supp; /archives//html/Amps/2005-10/msg00255.html (12,278 bytes)
34. Re: [Amps] Metron MA 1000b Misbehaving (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Mon, 10 Oct 2005 17:22:43 -0400; Yea take that extra length and wind an RF choke around a hunk of 3 inch pvc drain pipe. _____ Also, try lengthening the coax between the amp & antenna. Hi-Sierra recommends 20-25 feet of coax for the; /archives//html/Amps/2005-10/msg00260.html (11,013 bytes)
35. Re: [Amps] Low power output from 4-400A linear (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Tue, 11 Oct 2005 10:47:08 -0400; You should have used the B&W 852 with lower inductance but 60 to 65 % efficiency is good for a Class AB linear. Several years ago, I built a GG amplifier using a pair of 4-400A. The grid and screen a; /archives//html/Amps/2005-10/msg00275.html (8,306 bytes)
36. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Thu, 13 Oct 2005 15:16:38 -0400; You want to bond that ground back to the breaker panel to prevent offset voltages during a lightning strike. Don't rely on the neutral balk to the panel. Run another lead. My building inspector wants; /archives//html/Amps/2005-10/msg00325.html (10,524 bytes)
37. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 14 Oct 2005 09:09:51 -0400; Yup, and you want a low Z between all the grounds or you will develop large voltages between ground systems. The worst test pulse is 6.4us rise time and 69us fall the various tests are up to 10 MHz c; /archives//html/Amps/2005-10/msg00360.html (13,962 bytes)
38. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 14 Oct 2005 09:23:14 -0400; I would do a ring around the house both directions to avoid resonance . I would also bury the wire. Violate NEC and your insurance Co will laugh you if you ever get hit. They don't care about resonan; /archives//html/Amps/2005-10/msg00362.html (11,190 bytes)
39. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 14 Oct 2005 09:44:18 -0400; Dave, Below you said you were running 4 breakers, each 30 amps. Then you said two of those breakers would be wired with #12 wire. If your breaker is going to be a 30 amp breaker, you must, for safet; /archives//html/Amps/2005-10/msg00366.html (9,801 bytes)
40. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1): Author: "Carcia, Francis A HS" <francis.carcia@hs.utc.com>; Date: Fri, 14 Oct 2005 10:19:07 -0400; Since most transmitters have a coax connector output referenced to chassis ground. Say that chassis Is not grounded. Some of the energy will show up as a voltage between chassis and ground. I prefer; /archives//html/Amps/2005-10/msg00371.html (12,734 bytes)

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