Search String: Display: Description: Sort:

Results:

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

Total 394 documents matching your query.

161. Re: [Amps] SB 220 Exploding Resistor (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 19 Jan 2016 17:14:37 -0500
Tom, go to Harbach and buy a pack of their .82ohm resistors 2W ( $6). Your resistor did its job as it acts like a fuse in case there is a tube or other b+ short. Many amps used something like this. I
/archives//html/Amps/2016-01/msg00049.html (11,317 bytes)

162. Re: [Amps] SB 220 Exploding Resistor (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 19 Jan 2016 18:30:31 -0500
That is only good in early amps, a Heath bulletin had a simple wiring change, no convoluted voodoo mod needed. Only needed when on 240V Carl KM1H -- Original Message -- From: "Jim W7RY" <w7ry@century
/archives//html/Amps/2016-01/msg00050.html (11,972 bytes)

163. Re: [Amps] SB 220 Exploding Resistor (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 20 Jan 2016 17:48:09 -0500
If you get a strong enough wirewound resistor, this can suffice as the surge current limiting resistor for a spark over in a tube. With 250 amps at the beginning of the overcurrent (2500 V/10 ohms) s
/archives//html/Amps/2016-01/msg00053.html (12,654 bytes)

164. Re: [Amps] Alpha 77 troubleshooting (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 20 Jan 2016 17:49:00 -0500
When was the last time the HV filter cap was replaced? About $450 these days. Carl KM1H Good Afternoon, I am working on an ETO Alpha PA-77. The original model, not a DX or SX. The previous owner had
/archives//html/Amps/2016-01/msg00054.html (10,549 bytes)

165. Re: [Amps] SB 220 Exploding Resistor (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Wed, 20 Jan 2016 17:49:05 -0500
And how well does it hand a surge manybe 10X its rating? Not very well I'll guarantee Carl KM1H John, Have you ever looked at Surface Mount Power Film Resistors? A 25 ohm/ 25 watt is available from M
/archives//html/Amps/2016-01/msg00055.html (12,622 bytes)

166. Re: [Amps] NCL-2000 (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 22 Jan 2016 20:54:43 -0500
Dont even bother trying to find suitable new production axial lead caps, they dont exist any longer. For several years now Im using 100uF 450V Snap-In caps that perfectly fit the old clips which will
/archives//html/Amps/2016-01/msg00061.html (8,964 bytes)

167. Re: [Amps] Shunt resistors for a bridge made of 6A10 diodes (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 9 Feb 2016 17:01:27 -0500
I went with the caps BECAUSE I DID see some spikes on the line with a scope and the filter caps were fine. Another went from the output of the doubler to ground. No more hash. Carl KM1H He is talking
/archives//html/Amps/2016-02/msg00041.html (11,226 bytes)

168. Re: [Amps] dedicatedrf.com amps (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 28 Feb 2016 10:54:17 -0500
$7K buys very little in the antenna SYSTEM these days for those unable to build stuff themselves. For a legal power amp with some overhead 2-3 4CX600JA's do quite well with a swamped grid input and a
/archives//html/Amps/2016-03/msg00005.html (19,239 bytes)

169. Re: [Amps] HL2K high input SWR on 21 MHz (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 8 Mar 2016 17:15:22 -0500
Unless tested at rated voltage or even with drive the rest is guesswork. Carl KM1H Hi all, I have a HL2K amplifier (pair of 3-500Z) for several years now (got it second hand) and it always had a high
/archives//html/Amps/2016-03/msg00012.html (9,017 bytes)

170. Re: [Amps] Adjustable Regulated Screen Supply. (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 8 Mar 2016 21:33:09 -0500
Im not familiar with that name but I have an Oregon version that goes to 400V and gets its share of use. Another Oregon with a single 6146 goes 0-400V regulated and to 450V unregulated plus a 0-150V
/archives//html/Amps/2016-03/msg00013.html (9,311 bytes)

171. Re: [Amps] Oldie but Goodie MLA2500 questions (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 29 May 2016 17:18:36 -0400
What do you mean by "a little worn" Charlie? They all look scruffy after 30+ years and unless there are obvious burn marks at the top they should be fine. The same choke was used over a wide range of
/archives//html/Amps/2016-05/msg00037.html (9,126 bytes)

172. Re: [Amps] Oldie but Goodie MLA2500 questions (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 5 Jun 2016 20:57:55 -0400
Since the resonances change when in circut it should still cover WARC's; I have no problem with my MLA 2500 backup amp. Nor the Clipperton L and DTR-2000L here that use the same choke with 3-4 turns
/archives//html/Amps/2016-06/msg00018.html (12,050 bytes)

173. Re: [Amps] 3-500Z tube problems (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 14 Jun 2016 13:30:39 -0400
The weld problem was due to a cheapened down assembly where the original anode to top assembly was fully welded to just 3 spot welds. This was at the SLC plant which was known for several other dumb
/archives//html/Amps/2016-06/msg00052.html (10,642 bytes)

174. Re: [Amps] Memories of Many 11 Meter Amps (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 26 Feb 2017 13:32:48 -0500
Nope, it was the Galaxy 2000 from Leo's fertile mind Why 11M? Don't you remember the GLA1000 with a whole bank of sweep tubes, through 10. I don't know what the IM products were but back then, it "se
/archives//html/Amps/2017-02/msg00198.html (9,994 bytes)

175. Re: [Amps] Memories of Many 11 Meter Amps (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 26 Feb 2017 14:01:13 -0500
About 20 years ago I paid $100 for a 13 tube distributed amp with 13 almost new (16 hours on the paperwork) 8122's which was one of the best buys in my experience. Since I had retrieved the NCL-2000
/archives//html/Amps/2017-02/msg00200.html (10,987 bytes)

176. Re: [Amps] 3rd ed. Eimac's "Care and Feeding of Power Grid (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Fri, 10 Mar 2017 17:24:56 -0500
Just got my 1974 buyers guide off the shelf. It has some transformers numbers that I will probably save. The 3-500Z tube sells brand new from Eimac for $37. Colin K7FM contester folks on 75m at night
/archives//html/Amps/2017-03/msg00089.html (9,815 bytes)

177. Re: [Amps] 240 Volt Blowers needed (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 20 Mar 2017 17:04:46 -0400
Yes, remember that it's perfectly OK to run a 120V load between one side of the TX primary and its center tap. This is often done by the first rate amp mfrs. And remember that it is NOT OK (and is il
/archives//html/Amps/2017-03/msg00116.html (9,491 bytes)

178. Re: [Amps] 240 Volt Blowers needed (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 20 Mar 2017 19:35:03 -0400
On Mon,3/20/2017 2:04 PM, Carl wrote: Yes, remember that it's perfectly OK to run a 120V load between one side of the TX primary and its center tap. This is often done by the first rate amp mfrs. An
/archives//html/Amps/2017-03/msg00122.html (10,244 bytes)

179. Re: [Amps] 240 Volt Blowers needed (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Mon, 20 Mar 2017 20:38:35 -0400
I don't know of current Code that permits a circuit that lacks an equipment ground conductor run with the current-carrying conductors. That sort of thing was permitted in much older Codes, and old w
/archives//html/Amps/2017-03/msg00125.html (10,725 bytes)

180. Re: [Amps] Labeling house circuits (score: 1)
Author: "Carl" <km1h@jeremy.qozzy.com>
Date: Tue, 21 Mar 2017 12:01:53 -0400
I did all the electrical work here and added several extra circuits for convenience from the beginning and wound up adding another smaller 100A box for expansion years later to feed the garages/outbu
/archives//html/Amps/2017-03/msg00131.html (9,809 bytes)

Current List: 161 - 180
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
This search system is powered by Namazu