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41. [Amps] Gonset Amplifier (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 18 Sep 2002 13:06:44 -0700; [Steve Katz] No sweat. I've never seen that one, it is probably even older than the GSB-200, I'd guess. 4 x 807 = about 400Wdc input, though, or maybe 200W output power. Doesn't seem worthwhile for; /archives//html/Amps/2002-09/msg00134.html (8,261 bytes)
42. [Amps] Gonset Amplifier (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 18 Sep 2002 14:31:35 -0700; [Steve Katz] Bingo! -WB2WIK/6 (Actually, on second thought, couldn't this be used as a supersaturated unity gain stage? And, supplementally, as a wallet lightener?) To: <amps@contesting.com>; /archives//html/Amps/2002-09/msg00141.html (9,426 bytes)
43. [Amps] Gonset Amplifier (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 18 Sep 2002 14:42:17 -0700; /archives//html/Amps/2002-09/msg00142.html (8,309 bytes)
44. [Amps] NEED PLATE VOLTAGE 5KV METER (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 23 Sep 2002 07:48:28 -0700; Most "4 kV" (or any high voltage) meters are actually 1 mA or similar small-current meters that rely on an external, rather than internal, multiplier resistor in order to achieve the scale indicated.; /archives//html/Amps/2002-09/msg00204.html (7,807 bytes)
45. [Amps] 4CX250F Tubes (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 24 Sep 2002 07:34:13 -0700; [Steve Katz] I've used 4CX250F's in VHF PAs with great success. Because they have full gain/output up to 400 MHz, they might make great oscillators when used in an HF amp unless new precautions are; /archives//html/Amps/2002-09/msg00225.html (8,219 bytes)
46. [Amps] 4CX250F Tubes (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 24 Sep 2002 09:11:24 -0700; Hi Bill, see below... [Steve Katz] Yes, I have, but I've never seen one. The claims made seem inappropriate for the design indicated, at least to me. I wonder how they get "1200W PEP" output power fr; /archives//html/Amps/2002-09/msg00227.html (14,048 bytes)
47. [Amps] 4CX250F Tubes (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 24 Sep 2002 09:21:13 -0700; Hi Bill, I know the website. It seems devoid of any pricing or availability information for some reason. The amps look very much like several of my homebrew projects, so that doesn't bother me. I won; /archives//html/Amps/2002-09/msg00228.html (17,908 bytes)
48. [Amps] 4CX1000A base connections (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 26 Sep 2002 08:00:54 -0700; Jack, this data is on-line: http://www.rell.com/rellecom/Images/Objects/2500/2462.PDF The SK800B socket (Eimac) is actually labeled for connections, with markings stamped into the metal parts that ca; /archives//html/Amps/2002-09/msg00247.html (7,526 bytes)
49. [Amps] al80a (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 1 Aug 2002 07:03:33 -0700; //When you power "on" the amp but it remains in standby (unkeyed), it shouldn't draw any plate current and the anode should be dark gray. If it's drawing current, either it's keyed or its cutoff bia; /archives//html/Amps/2002-08/msg00003.html (7,935 bytes)
50. [Amps] al80a (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 1 Aug 2002 07:08:23 -0700; /archives//html/Amps/2002-08/msg00004.html (8,830 bytes)
51. [Amps] al80a (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 2 Aug 2002 07:10:39 -0700; /archives//html/Amps/2002-08/msg00021.html (8,683 bytes)
52. [Amps] 6A rectifier diode choice (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 14 Aug 2002 11:02:51 -0700; [Steve Katz] This idea has a lot of merit. Leaded diodes (devices having wire leads) are cooled exclusively by heat exchange occurring in the leads themselves, i.e., the leads are the heatsinks. If; /archives//html/Amps/2002-08/msg00137.html (8,479 bytes)
53. [Amps] Transformer Noise (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 14 Aug 2002 11:12:24 -0700; Maybe the SB1000 & Clipperton hum because they don't know the words? -WB2WIK/6; /archives//html/Amps/2002-08/msg00138.html (6,841 bytes)
54. [Amps] Boat Anchor (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 23 Aug 2002 10:52:25 -0700; Joe, that sounds extremely modified! Glen, K9STH is a competent technician and I would trust his work, but if he bought the amp already modified and didn't personally use it, then who knows-? Did Gle; /archives//html/Amps/2002-08/msg00229.html (12,023 bytes)
55. [Amps] Boat Anchor (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 23 Aug 2002 13:11:29 -0700; Hi Joe, It looks like an experimenter's paradise in there. I see connections and wires going nowhere -- assume these are rendered superfluous by new and added circuitry-? The high-Q parasitic suppres; /archives//html/Amps/2002-08/msg00234.html (24,651 bytes)
56. [Amps] Boat Anchor (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 23 Aug 2002 13:23:59 -0700; The autotuner in series with the amp input makes sense, and is what most people do if they haven't added a bandswitching tuned input circuit. Is there some cathode biasing in there somewhere? "If eve; /archives//html/Amps/2002-08/msg00236.html (9,700 bytes)
57. [Amps] Boat Anchor (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 23 Aug 2002 13:47:27 -0700; Joe, why just the "center conductor" from a piece of RG8? Why not the coax, itself, using the shield also, and grounding the shield at both ends? On 80m, it doesn't make much difference, but on 10m,; /archives//html/Amps/2002-08/msg00238.html (11,111 bytes)
58. [Amps] Which Amp (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 26 Aug 2002 15:59:21 -0700; Re "foolproof" amplifiers, in this particular case I'd recommend an old Alpha 78. Haven't been made in years, but therefore very reasonably priced. They're no-tune and cover 160-10 meters. Replacemen; /archives//html/Amps/2002-08/msg00282.html (15,877 bytes)
59. [Amps] Yaesu FL2100B to 6 Meters? (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 27 Aug 2002 12:24:21 -0700; Ron, I don't think anyone could make this work. Parallel 572B's don't lend themselves to 50 MHz operation. I modeled the SB-200 (similar circuit) for 50 MHz and determined the plate tank C would have; /archives//html/Amps/2002-08/msg00289.html (8,412 bytes)
60. [Amps] Yaesu FL2100B to 6 Meters? (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 27 Aug 2002 17:28:03 -0700; 811's really don't lend themselves to 50 MHz operation! There's a tube that was developed and marketed before the six meter band existed, and 100 MHz was called "UHF." I wouldn't go that way... -WB2W; /archives//html/Amps/2002-08/msg00293.html (8,980 bytes)

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