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381. [AMPS] AL1500 (score: 1): Author: 2@vc.net (2); Date: Thu, 6 Dec 2001 06:38:19 -0800; \\ However, when the cathode electrons strike the floating grid it acquires a negative charge, which should reduce anode current. With the grid floating, there should be no grid current. - R. L. Mea; /archives//html/Amps/2001-12/msg00146.html (11,799 bytes)
382. [AMPS] AL1500 (score: 1): Author: 2@vc.net (2); Date: Thu, 6 Dec 2001 06:55:19 -0800; A conventional relay adds c. 15mS delay. My assumption - based on 8877 autopsies - is that this delay may be problematic because gold-sputtering occasionally happens. In my experience, fast fuses se; /archives//html/Amps/2001-12/msg00147.html (8,890 bytes)
383. [AMPS] AL1500 (score: 1): Author: 2@vc.net (2); Date: Thu, 6 Dec 2001 20:31:48 -0800; // Any port in a storm. In the Alpha 70-V, a fast fuse successfully protected the grid. In my Fluke DMM, a fast acting fuse protects the instrument. // Surely, if it is a slow-blow fuse. Fast acting; /archives//html/Amps/2001-12/msg00154.html (11,349 bytes)
384. [AMPS] Re: 6m amp blocking caps (score: 1): Author: 2@vc.net (2); Date: Thu, 6 Dec 2001 20:31:46 -0800; In a 2-component, parallel circuit, the components are in series with each other and they are in series with the L of the conductors used to connect them. I see the two, equal values of C and two eq; /archives//html/Amps/2001-12/msg00155.html (10,022 bytes)
385. [AMPS] AL1500 (score: 1): Author: 2@vc.net (2); Date: Fri, 7 Dec 2001 07:57:57 -0800; // The original L-4B, SB-220, and TL-922 circuits used approx. 1mH, 1A rated chokes in the grid to gnd DC returns. Such chokes act as fuses somewhat above 10A since the current envolved occasionally; /archives//html/Amps/2001-12/msg00161.html (8,671 bytes)
386. [AMPS] Another Stupid Question (score: 1): Author: 2@vc.net (2); Date: Fri, 7 Dec 2001 07:57:59 -0800; // Marv -- Do the math and you will likely stow your wrath. Tom and I see pretty much eye-to-eye on specious Ham radio techno-traditions. cheers - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/me; /archives//html/Amps/2001-12/msg00162.html (12,442 bytes)
387. [AMPS] Re: (score: 1): Author: 2@vc.net (2); Date: Fri, 7 Dec 2001 10:55:00 -0800; Thanks, Tom, but I dont use 'em. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative req; /archives//html/Amps/2001-12/msg00168.html (7,453 bytes)
388. [AMPS] AL1500 (score: 1): Author: 2@vc.net (2); Date: Fri, 7 Dec 2001 10:55:02 -0800; // Autopsies inddicate that some electronic trip circuits are not be able to prevent gold-sputtering in an 8874, 3cx800A7 or 8877. Circumstantial evidence is that a 0.25A fast fuse makes an 8877 har; /archives//html/Amps/2001-12/msg00169.html (10,983 bytes)
389. [AMPS] 8171/4cx10,000D blower (score: 1): Author: 2@vc.net (2); Date: Fri, 7 Dec 2001 14:01:48 -0800; FREE TO A GOOD HOME-brewer, If you are constructing a big stick tetrode amp, I have a suitable blower that is quiet (1700rpm) and should do for up to 18 out on SSB. Recipient pays UPS. (note -- this; /archives//html/Amps/2001-12/msg00172.html (6,754 bytes)
390. [AMPS] 160 mtr conversion (score: 1): Author: 2@vc.net (2); Date: Sat, 8 Dec 2001 18:13:38 -0800; // There is an article in the January 1989 *QST*. It's also available on my Web site. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/am; /archives//html/Amps/2001-12/msg00176.html (6,620 bytes)
391. [AMPS] Re: 6m amp blocking caps (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 00:30:14 -0800; // It tells you that an additional resonance is in series with the anode circuit. // To simulate the condition caused by paralling two blocking caps, they need to be measured in paralleled. // A gar; /archives//html/Amps/2001-12/msg00177.html (10,412 bytes)
392. [AMPS] AL1500 (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 07:51:57 -0800; // Close. I suggest replacing grid protect circuits - which have a track record of failure - with a fast-acting fuse or a carbon-film resistor. // The AL-1500 seems to occasionally gold-sputter the; /archives//html/Amps/2001-12/msg00180.html (8,303 bytes)
393. [AMPS] Re: maximum output for (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 10:13:11 -0800; About 3000w. 4,000w of AM carrier requires a linear amplifier that makes 16,000 w PEP. I would use a 4cx10,000D @ 8 - 9kV, 4A peak to do this. Drive requirement is c. 150w PEP. Triodes like the 3cx1; /archives//html/Amps/2001-12/msg00183.html (8,034 bytes)
394. [AMPS] Re: maximum output for (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 16:58:35 -0800; 3000wpep out / 7kV-700mA pep in on SSB does not exceed the dissipation rating. cheers, Phil - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/; /archives//html/Amps/2001-12/msg00189.html (8,362 bytes)
395. [AMPS] Re: maximum output for (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 17:32:14 -0800; // You seem to have missed the SSB part, Phil. The duty cycle on SSB is c.30%. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2001-12/msg00194.html (8,585 bytes)
396. [AMPS] Re: maximum output for (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 17:32:16 -0800; I am not familiar with Class D, Marv. cheerio - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Admi; /archives//html/Amps/2001-12/msg00195.html (8,808 bytes)
397. [AMPS] Re: maximum output for (score: 1): Author: 2@vc.net (2); Date: Sun, 9 Dec 2001 17:35:27 -0800; AM linear and SSB linear are virtually the same. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com A; /archives//html/Amps/2001-12/msg00196.html (8,928 bytes)
398. [AMPS] Re: maximum output for (score: 1): Author: 2@vc.net (2); Date: Mon, 10 Dec 2001 03:00:00 -0800; // Touché. However, AM linear service is similar to SSB linear service, especially on VOX -- which pretty much drives AMers nuts. ok, Phil, I'm gonna to turn it over to you. K - R. L. Measure; /archives//html/Amps/2001-12/msg00198.html (8,594 bytes)
399. [AMPS] Reflector thoughts about my future amp project wanted! (score: 1): Author: 2@vc.net (2); Date: Tue, 11 Dec 2001 05:35:28 -0800; // The elegantly too-simple split-chassis cooling method employed in the Heath SB-220 offers superior cooling with less noise that the Eimac "air-system" socket/chimney, which requires a high-pressu; /archives//html/Amps/2001-12/msg00205.html (10,002 bytes)
400. [AMPS] old linears. (score: 1): Author: 2@vc.net (2); Date: Tue, 11 Dec 2001 11:40:16 -0800; // The slam-dunk fix is to increase the Q of each Pi tuned input to 2 - 3, [XC-in =17 - 25?, adjust L and C-out for the best match, then replace with equivalent fixed values. cheers, Dick - R. L. Me; /archives//html/Amps/2001-12/msg00208.html (7,185 bytes)

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