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21. Re: [Amps] TT Centuruion oscillation (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sun, 09 Oct 2005 00:20:32 -0400; Hello Mike: Well, the 20 feet or so of RG 8 will not cause any loss of receiver sensitivity, while eliminating power roll off of the exciter. It is a pretty simple solution to a very common issue wit; /archives//html/Amps/2005-10/msg00194.html (12,415 bytes)
22. Re: [Amps] sb220 relay (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Mon, 10 Oct 2005 16:03:27 -0400; Hello John: I'm sure I have one or two in my junk box after all the vacuum relay conversions that I've done. Please drop me a line off list. Regards, Mike WB2AJI -- Original Message -- From: "John Ad; /archives//html/Amps/2005-10/msg00254.html (7,281 bytes)
23. Re: [Amps] FL2OOOB (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 11 Oct 2005 16:05:57 -0400; Hello Morrie: The first thing to try is to lengthen the coax between the amp and the transceiver. I would recommend that the cable be at least 20 feet in length, RG 8 type coax. Then, go ahead and re; /archives//html/Amps/2005-10/msg00281.html (8,057 bytes)
24. Re: [Amps] FL2OOOB (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 11 Oct 2005 18:19:04 -0400; Hi Jim: I would agree, that at HF the small amount of losses introduced with 20 feet or so of RG 8 is pretty insignificant. I believe strongly in the double peaked, broad band impedance match theory.; /archives//html/Amps/2005-10/msg00288.html (9,688 bytes)
25. Re: [Amps] FL2OOOB (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 11 Oct 2005 18:48:58 -0400; make _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-10/msg00289.html (8,865 bytes)
26. Re: [Amps] AC wiring (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Wed, 19 Oct 2005 10:56:05 -0400; Hello Louie: You are exactly correct in my opinion. The current rating for any given conductor, has everything to do with the insulation system which is utilized. The codes do not recognize what appl; /archives//html/Amps/2005-10/msg00465.html (12,586 bytes)
27. Re: [Amps] 3-500z (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 25 Oct 2005 23:55:38 -0400; Hello Chris: You could wire the transformer for 240 volts, and plug the amp into 120 VAC, and let it heat the filaments for a while. The low voltage should be fine for the triode and its type of fila; /archives//html/Amps/2005-10/msg00584.html (8,783 bytes)
28. Re: [Amps] 3-500z (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Wed, 26 Oct 2005 09:33:40 -0400; Hello Jason: Model # Description Price AL-80B 1 KW Output Linear Amplifier w/ 3-500ZG Tube on 100/110/120V for US My old SB 220, which I have to admit I have heavily modified, and uses Chinese Graphi; /archives//html/Amps/2005-10/msg00593.html (9,670 bytes)
29. Re: [Amps] 3-500z (score: 1): Author: cherokeehillfarm@earthlink.net; Date: Wed, 26 Oct 2005 21:01:11 -0400 (GMT-04:00); Hello Amp Fans: Here are the Eimac Specs for the old 500 watt dissipation version, the newer graphite plates have 600 watts dissipation. The older tubes were lower mu than the newer tubes. There is d; /archives//html/Amps/2005-10/msg00613.html (9,491 bytes)
30. Re: [Amps] 3-500z (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Thu, 27 Oct 2005 11:34:11 -0400; Hello Rich: I have here spec sheets for the old Eimac triodes, the newer version Eimac, and the Amperex tubes. I have never seen a formal spec sheet for the Chinese triodes. Can you post the Chinese; /archives//html/Amps/2005-10/msg00625.html (10,857 bytes)
31. Re: [Amps] New Vacuum Relay Supplier (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sat, 29 Oct 2005 10:01:10 -0400; Hello Bob: I used two of the GH-1 relays in a QSK project for a trio of 3CPX800A7s, and they work very well. They are carbon copies of the Kilovac HC-1, and their coils are interchangeable with the K; /archives//html/Amps/2005-10/msg00671.html (12,335 bytes)
32. Re: [Amps] Titan 425 amp (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sat, 29 Oct 2005 22:57:52 -0400; Hello Ron: Your grid current should rise with your voice peaks, and plate current peaks on SSB. You don't say which way your grid current is deflecting, but it should be upwards. 73, Mike WB2AJI -- O; /archives//html/Amps/2005-10/msg00673.html (7,844 bytes)
33. Re: [Amps] Henry 4 K-2 SWR (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Wed, 07 Dec 2005 22:05:35 -0500; Hello Bud: It is possible that there may be some contamination on the contacts of the T/R relay, and you might try cleaning them if they are open frame. If they are vacuum relays, there isn't much yo; /archives//html/Amps/2005-12/msg00085.html (10,177 bytes)
34. [Amps] Source for rebuilding 8877 triodes (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 03 Jan 2006 13:25:43 -0500; Hello Amp Fans: I seem to have lost some notes as to which company is currently rebuilding the 8877. It seems that coated cathodes represent a problem for rebuilders, and most do not rebuild this tri; /archives//html/Amps/2006-01/msg00150.html (10,105 bytes)
35. Re: [Amps] need to buy MRF150 transistors (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 06 Jun 2006 16:57:37 -0400; Rob: Try Advanced Semi for the matched pair: Advanced Semiconductor Inc 7525 Ethel Ave North Hollywood CA 91605 Phone: 818-982-1200 Fax: 808-765-3004 Email sales@edsemi.com Website: http://www.adsemi; /archives//html/Amps/2006-06/msg00183.html (8,418 bytes)
36. Re: [Amps] transformers (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sun, 16 Jul 2006 18:55:46 -0400; This discussion doesn't seem to match what the SB 200 and SB 220 have produced since I built them. My SB 200 produces 700 Watts PEP, with about 50 Watts PEP drive, and my SB 220 produces about 1.5 KW; /archives//html/Amps/2006-07/msg00457.html (11,252 bytes)
37. Re: [Amps] transformers (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sun, 16 Jul 2006 20:58:11 -0400; Mike: Your experience is exactly what I have seen in the many SB 220s that I have repaired and modified. I think to upgrade the blower is wise at these power levels, and I think you need to change ou; /archives//html/Amps/2006-07/msg00467.html (13,519 bytes)
38. Re: [Amps] transformers (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sun, 16 Jul 2006 22:10:15 -0400; Well, I stated what I have used for measurement, and I realize that the Bird and Nye Viking are not a Hewlett Packard. I can accept that both meters may be off by 10%, even though their accuracy is s; /archives//html/Amps/2006-07/msg00474.html (11,363 bytes)
39. Re: [Amps] transformers (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Sun, 16 Jul 2006 23:04:20 -0400; I test into my dummy load with a 50 resistor and 1 gallon of oil, which reads 1:1 SWR, or operate my 20 meter monoband yagi at such a frequency where SWR is also 1:1. The results are the same. 73 and; /archives//html/Amps/2006-07/msg00481.html (13,532 bytes)
40. Re: [Amps] transformers (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Mon, 17 Jul 2006 08:44:34 -0400; If I were making RF measurements everyday, I would have instruments far better than the Bird 43P and Bird 43 here in my workshop. I would imagine that a modern day manufacturer would also. Although w; /archives//html/Amps/2006-07/msg00507.html (12,449 bytes)

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