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301. [Amps] Transformer surge current (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 10:51:56 -0500; All, Have any of you checked into the surge current of a C-core type transformer compared to an EI type transformer made with Laminations? Have you noticed on a C-core that big thump and hum when pow; /archives//html/Amps/2006-02/msg00610.html (7,754 bytes)
302. Re: [Amps] [BULK] - DIN stands for....? (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 15:17:55 -0500; Keith, I have the Mouser catalog here in front of me, it's the April 2006 version, cat# 625 and am looking at those Bulgin plug/socket assemblies. They're on pages 967-968. They show them to be the s; /archives//html/Amps/2006-02/msg00634.html (17,107 bytes)
303. Re: [Amps] Panel lettering, scales, dials, etc (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 15:32:45 -0500; Alan, It's according to how big the cabinet face is, but one way I made some real nice faceplates was to first print the face on an 11" x 17" (B size) piece of paper on an inkjet plotter or widebed p; /archives//html/Amps/2006-02/msg00637.html (9,133 bytes)
304. Re: [Amps] figuring tube output impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 15:41:31 -0500; Chuck, I have a link below to a Hams website who uses the factor 1.87 instead of 1.8 which he came up with from experimentation. He said it actually gets you closer to the correct values than using 1; /archives//html/Amps/2006-02/msg00641.html (9,409 bytes)
305. [Amps] For test equip. collectors (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 22:19:35 -0500; I ran acroos this and thought some might be interested as I know a few on here collect older test equipment. This is an old Tek 547 with several plugins, the scopemobile, amd camera, all working. It'; /archives//html/Amps/2006-02/msg00653.html (7,309 bytes)
306. Re: [Amps] DIN - Plessey connectors (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 22:41:01 -0500; Roger, When I worked for JH Fletchers in mechanical engineering, we never did use any connectors that I can remember. I think they did though on the main power cable where it went into the power cent; /archives//html/Amps/2006-02/msg00655.html (10,641 bytes)
307. [Amps] A little amusement (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 27 Feb 2006 23:34:32 -0500; All you have to do is read what they guy has to say about this scope and it speaks for itself. This should give all a laugh. I had to post it as I thought it was a good one and break up the monotony.; /archives//html/Amps/2006-02/msg00656.html (6,674 bytes)
308. Re: [Amps] dummy oil (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Tue, 28 Feb 2006 21:25:22 -0500; Gil, You'd have really gotten his goat if you had bought a pack of condoms with it! LOL Best, Will ** REPLY SEPARATOR ** On 2/28/06 at 9:23 PM Gil Bishop wrote: ______________________________________; /archives//html/Amps/2006-02/msg00688.html (8,042 bytes)
309. Re: [Amps] RE : dummy oil (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 12:01:52 -0500; Jos, That's a good one. I know this isn't pertaining to amps but have to tell it. Here's a gag for your local pharmacist. First obtain one of those extra, extra large condoms from a novelty shop. The; /archives//html/Amps/2006-03/msg00007.html (9,519 bytes)
310. [Amps] GE (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 12:04:14 -0500; All, I'm in need of a GE cross refrence book from the early 80's. The brown book like the old ECG cross books. I can not find mine, and need one. Heathkit used a good bit of GE semis and I have a few; /archives//html/Amps/2006-03/msg00008.html (6,368 bytes)
311. Re: [Amps] Panel lettering, scales, dials, etc (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 18:47:11 -0500; Alan, There is some rub on decals especially for amateur radio and electronics. They have scales for pots, and variable capacitors on them. After you apply the rub on, there's a sealent varnish they; /archives//html/Amps/2006-03/msg00013.html (13,618 bytes)
312. Re: [Amps] Panel lettering, scales, dials, etc (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 19:09:25 -0500; I almost forgot this method. You can either lay out the face on paper on a drafting table, or do the layout in CAD. Take it to your blueprint supply had have them run it off on mylar. Mylar of course; /archives//html/Amps/2006-03/msg00014.html (16,972 bytes)
313. Re: [Amps] GE (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 19:14:24 -0500; Bill and Geoff, Thanks, there is one power transistor I need the specs on to cross it. I'll look it up later on tonight or tomorrow. I do want to buy a copy of this cross book if anyone has it. I've; /archives//html/Amps/2006-03/msg00015.html (8,745 bytes)
314. Re: [Amps] Panel lettering, scales, dials, etc (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 19:29:41 -0500; Mike, Yes, a person could try Office Depot, or Kinkos. I've not looked for the mylar film there, but they may have it. I do know that Office Depot carries some drafting Vellum and drafting tools. It'; /archives//html/Amps/2006-03/msg00017.html (8,292 bytes)
315. Re: [Amps] Cross reference ECG (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Wed, 01 Mar 2006 23:41:05 -0500; Gene, Thanks for the help. Another ham found a copy he's going to send me so I'll be able to see the full specs. What it is, I have a Heath scope here with a horizontal sweep transistor bad. GE made; /archives//html/Amps/2006-03/msg00019.html (7,763 bytes)
316. Re: [Amps] Alpha 78 voltage sag (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Thu, 02 Mar 2006 12:22:05 -0500; Hal, See below; ** REPLY SEPARATOR ** If there's not as much core area in square inches as the old reansformer, and used the same type steel, it is undersized from the old. The core area is what dete; /archives//html/Amps/2006-03/msg00025.html (10,898 bytes)
317. Re: [Amps] HB amps (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 03 Mar 2006 16:43:11 -0500; My guess G-G for 600. I was thinking myself of building one of these with 813's since they're still making them. Shugang Tubes in China is making them and the 811 I believe. I have a design I had sta; /archives//html/Amps/2006-03/msg00047.html (9,607 bytes)
318. Re: [Amps] Alpha 78 voltage sag (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 05 Mar 2006 11:23:26 -0500; Tomms right. There's not enough iron in a 60 Hz transformer to be ran on 50 Hz, and the number of turns is different also. From experience, I've found good regulation to be about 12% to 13%, or in ot; /archives//html/Amps/2006-03/msg00090.html (12,320 bytes)
319. Re: [Amps] simple balun (101) questions (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 05 Mar 2006 11:36:32 -0500; Dan, It could be your not using enough core area if it's running hot, etc. The XL for most I would think should around 200 ohms. Calculate that from the inductance of the winding. You are correct tho; /archives//html/Amps/2006-03/msg00091.html (9,133 bytes)
320. Re: [Amps] Alpha 78 voltage sag (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 05 Mar 2006 12:08:22 -0500; ** REPLY SEPARATOR ** Most all European countries are 50 Hz if I recall. Japan is also I think, but I think they use a different line voltage. Most likely. However, I'd check the back of the amp as m; /archives//html/Amps/2006-03/msg00094.html (13,408 bytes)

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