Mail Archive Search: <+from:km1h@jeremy.qozzy.com>

Results:

References: [ +from:km1h@jeremy.qozzy.com: 394 ]

Total 394 documents matching your query.

221. Re: [Amps] new amp race (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 21 May 2017 09:51:01 -0400; <I watched as EU ruined itself in contests with super high power big antenna stations. Result seems to be they can not hear weaker long distant stations.... so end up working each other in a band ful; /archives//html/Amps/2017-05/msg00205.html (11,673 bytes)
222. Re: [Amps] new amp race (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 21 May 2017 10:07:13 -0400; I watched as EU ruined itself in contests with super high power big antenna stations. Result seems to be they can not hear weaker long distant stations.... so end up working each other in a band full; /archives//html/Amps/2017-05/msg00206.html (13,618 bytes)
223. Re: [Amps] new amp race (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 21 May 2017 17:47:01 -0400; -- ORIGINAL MESSAGE --(may be snipped) My 1969 Chevy El Camino SS with a 396 big block would make 375. REPLY: On a recent road trip, my 2017 Chevy Cruze with a 1.4 liter 4-cylinder turbo got 51.6 mi; /archives//html/Amps/2017-05/msg00223.html (10,499 bytes)
224. Re: [Amps] new amp race; switched to cars (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 22 May 2017 13:30:30 -0400; -- ORIGINAL MESSAGE --(may be snipped) But your Prius can't smoke the tires for 5 or 6 car lengths, and if it can't do that it's just transportation. Acceleration and Watts ... Acceleration and Watt; /archives//html/Amps/2017-05/msg00246.html (11,387 bytes)
225. Re: [Amps] new amp race (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 23 May 2017 15:51:54 -0400; Good luck on finding a good YC-156 these days, which is a special selected 3CPX5000A7/YC-179 which uses a 3CPX15000B grid and cathode. They have pretty much been replaced with SS and most of the offe; /archives//html/Amps/2017-05/msg00263.html (13,445 bytes)
226. Re: [Amps] new amp race (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 23 May 2017 21:59:29 -0400; The real problem is the layout and anode coupling to everything around it, it is not a tube to be put in the smallest possible enclosure unless it is plywood! The added L before the the Tune cap or t; /archives//html/Amps/2017-05/msg00271.html (11,804 bytes)
227. Re: [Amps] 3-500Z cool down time (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 5 Jun 2017 15:20:09 -0400; Im happy to oblige. The initial runs had graphite plates and were made by Philips until Eimac got their act together. Early SB-220's and other late 69 early 70 amps used them. Amperex (owned by Phili; /archives//html/Amps/2017-06/msg00059.html (10,477 bytes)
228. Re: [Amps] 3-500Z cool down time (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 6 Jun 2017 12:45:26 -0400; The initial use was for ISM amps. Except for a short time in the late 80's Eimac 3-500Z's had no seal problems and I still have a few with 70's date codes that are fine. The Chinese versions have bee; /archives//html/Amps/2017-06/msg00089.html (13,199 bytes)
229. Re: [Amps] 1993 Vintage 3-500z (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 6 Jun 2017 13:17:22 -0400; That process will do nothing for the 3-500 family. Since the ongoing gettering process requires anodes to be run at color at least 3-4 times a year from new and a lot more when they have sat for year; /archives//html/Amps/2017-06/msg00091.html (13,833 bytes)
230. Re: [Amps] 3-500Z cool down time (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 6 Jun 2017 13:17:31 -0400; The 3CX1000A7 preceeded the 3CX1200A7 and what followed later. Ive been using a TV translator 70's date code pull in my 2M amp for 35 years and it still shows the same 1800W max at the same drive lev; /archives//html/Amps/2017-06/msg00092.html (11,654 bytes)
231. Re: [Amps] 3-500Z cool down time (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 6 Jun 2017 13:30:28 -0400; -- Original Message -- From: "Carl" <km1h@jeremy.qozzy.com> To: "Charlie Young" <weeksmgr@hotmail.com>; "Joe" <nss@mwt.net>; "Catherine James" <catherine.james@att.net>; "Amps group" <amps@contesting; /archives//html/Amps/2017-06/msg00093.html (16,721 bytes)
232. Re: [Amps] 3-500Z cool down time (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 8 Jun 2017 13:18:23 -0400; <The initial use was for ISM amps. Except for a short time in the late 80's Eimac 3-500Z's had no seal problems and I still have a few with 70's date codes that are fine. The Chinese versions have be; /archives//html/Amps/2017-06/msg00120.html (14,540 bytes)
233. Re: [Amps] 3-500Z cool down time (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 6 Jun 2017 13:25:43 -0400; I suspect that Eimac put a lot more effort into conditioning the tubes back then. Pull a better vacuum and the breakdown voltage increases. Ive hi-potted some beyond the 13KV capacity of my tester. O; /archives//html/Amps/2017-06/msg00127.html (16,761 bytes)
234. Re: [Amps] LDMOS availability (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sat, 10 Jun 2017 11:44:01 -0400; <There are two issues, here, one being the definition of Class C, and the <other being linearity. I'm inclined to agree with Bill on both. It's not hard to imagine modulating the bias, so that on voi; /archives//html/Amps/2017-06/msg00135.html (13,269 bytes)
235. Re: [Amps] Ferrite Core for 160M PI Output ? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 11 Jun 2017 15:40:01 -0400; Date: Sat, 10 Jun 2017 14:09:05 -0700 From: Paul Baldock <paul@paulbaldock.com> To: "Amps group" <amps@contesting.com> Subject: [Amps] Ferrite Core for 160M PI Output ? Message-ID: <593c5ff4.4bd1620; /archives//html/Amps/2017-06/msg00169.html (10,166 bytes)
236. Re: [Amps] Ferrite Core for 160M PI Output ? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 11 Jun 2017 18:16:59 -0400; With Teflon insulated wire and Scotch 27 tape between windings probably 4-5KV. A Hi-Pot tester is great for such things. Carl Hello Carl, I am beginning to build an LF amp using a GS35B tube, what do; /archives//html/Amps/2017-06/msg00174.html (9,878 bytes)
237. Re: [Amps] Ferrite Core for 160M PI Output ? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 12 Jun 2017 14:39:51 -0400; Those are great tubes Peter; I use a pair as AM modulators. Carl Indeed, this pp amp with GU81 runs with 3.5KV on the anodes: http://www.pbase.com/df3kv/image/86725410/original 73 Peter, DJ7WW --Orig; /archives//html/Amps/2017-06/msg00186.html (11,620 bytes)
238. Re: [Amps] Ferrite Core for 160M PI Output ? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 12 Jun 2017 15:02:57 -0400; Insulation. Never tried Kapton. Why is it necessary to wrap the individual toroids before stacking? How about Kapton Tape instead of Scotch 27? - Paul KW7Y Dont forget to wrap each one with a layer o; /archives//html/Amps/2017-06/msg00187.html (9,412 bytes)
239. Re: [Amps] Ferrite Core for 160M PI Output ? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 12 Jun 2017 19:16:49 -0400; Insurance for long life as real strange voltages can be present during tuning. Ive rewound enough from commercial ham amps to see what can happen. I understand insulating between the wire and the cor; /archives//html/Amps/2017-06/msg00192.html (10,163 bytes)
240. Re: [Amps] Ferrite Core for 160M PI Output ? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Tue, 13 Jun 2017 14:20:22 -0400; <I understand insulating between the wire and the core, but why do you <need to insulate the two cores from each other? 360 deg around each core. If you instead wrap the entire mess of stacked cores,; /archives//html/Amps/2017-06/msg00202.html (10,605 bytes)

Current List: 221 - 240
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]