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1. [AMPS] Heath HA-14 Mobile AMP?? (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sun, 11 Apr 1999 23:05:16 +0100; Hey guys, I have a line on a Heath HA-14 Amp w/DC powersupply. I understand it has 2 572B's, and 1000 watts input. Does it have a tuned input? Any comments from those who have operated one? For the p; /archives//html/Amps/1999-04/msg00233.html (7,038 bytes)
2. [AMPS] Aluminum sheet (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Thu, 28 Jan 1999 01:16:21 +0000; Hi John, Go to your local sign shops or local gov't shops that deal with signs. You can finnagle new blanks or used signs. My amp is made of detour signs. The finish can be removed with zip strip, a; /archives//html/Amps/1999-01/msg00508.html (8,438 bytes)
3. [AMPS] Pole Xformer Quiz (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sat, 05 Dec 1998 20:28:21 +0000; I've got a pole transformer I'm using for B+. Unknown manufacturer, but it is marked 10KW. It has two high voltage insulators on one side, and on the the other it has three insulated low voltage term; /archives//html/Amps/1998-12/msg00066.html (7,753 bytes)
4. [AMPS] Grid Current problem (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sun, 06 Dec 1998 10:35:35 +0000; I finally got my YC-156 on line, sort of. As noted in my earlier transformer post, I am using about 3400Vdc B+, which effects my design RL of 2400 ohms which the amp was designed for. The following p; /archives//html/Amps/1998-12/msg00085.html (8,044 bytes)
5. [AMPS] Grid Current problem (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Mon, 07 Dec 1998 00:17:42 +0000; Hello McFly, Are you in there? After speaking with the fellow I bought the Simpson meters from, I found only the plate meter was direct reading, the grid meter needed a shunt. This cleared up the wei; /archives//html/Amps/1998-12/msg00111.html (10,488 bytes)
6. [AMPS] YC156 Update (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Fri, 11 Dec 1998 23:21:15 +0000; Holy Smokin' Dummy Load! Things appear to be working now, I had to do some further refining on my metering shunts. Turns out I had some odd meters, and my grid current meter was reading 5X the actual; /archives//html/Amps/1998-12/msg00198.html (7,858 bytes)
7. [AMPS] Vacuum Var. Question (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sun, 29 Nov 1998 22:32:35 +0000; The reason I'm asking this is due to my lack of a capacitance tester. I have a Jennings UCS500, 7.5KV Vacuum Variable. I'm not sure if the bell it came with is original, so I think possibly the limit; /archives//html/Amps/1998-11/msg00374.html (7,272 bytes)
8. [AMPS] Cathode? (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sat, 17 Oct 1998 20:07:52 +0100; Hey Gang, In the YC156, the cathode is connected to one leg of the filament. Is the cathode connected to the outer ring, or the center connection? My info and data sheets does not address it. 73 Jay; /archives//html/Amps/1998-10/msg00236.html (6,663 bytes)
9. [AMPS] Oxide Cathodes (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Fri, 01 May 1998 17:00:42 +0100; Hi Guys, I noticed that some tubes with oxide cathodes (3cpx5000a7 ex.) have data sheets that say "no class C operation"...How come? 73 Jay W7CW 1AB Ranch Gillette, Wyoming -- FAQ on WWW: http://www.; /archives//html/Amps/1998-05/msg00013.html (6,912 bytes)
10. [AMPS] YC-156 Data (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Fri, 03 Apr 1998 00:49:04 +0100; Evening Fellows, I've been playing with the KD9JQ Triode program and have found it pretty interesting. I've been told by a number of folks that you can model a YC-156 by using the 3CX15000B7 file tha; /archives//html/Amps/1998-04/msg00016.html (7,338 bytes)
11. [AMPS] Data Sheets? (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Fri, 10 Apr 1998 18:43:41 +0100; Hello fella's I have a point of confusion. I have been told that the 3cx15000b7 and the YC-156, share similar data constant current characteristics. I have the constant current graphs for both tubes,; /archives//html/Amps/1998-04/msg00080.html (7,188 bytes)
12. [AMPS] Coil Voltages/Bandswitch (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Wed, 04 Mar 1998 22:25:22 +0000; Hi Guys, Here's a question I've always wondered about. "Is the rf voltage in a final tank coil equally distributed across the coil?" The reason I'm asking this is I'm building an amp that will use ap; /archives//html/Amps/1998-03/msg00053.html (7,502 bytes)
13. [AMPS] Readings on Clipperton L (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Mon, 09 Mar 1998 11:50:32 +0000; Jonathan, I had a similar problem 15 yrs ago with the amp. I inadvertantly used the wrong antenna,and caused an arc across the tank coil, which is rolled on a phenolic tube. It left a carbon trace on; /archives//html/Amps/1998-03/msg00076.html (8,105 bytes)
14. [AMPS] Blowers (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Tue, 10 Mar 1998 11:46:01 +0000; Has anyone experimented with using a furnace blower for cooling their tubes? I was curious if anyone had actually measured available back pressure for any particular size wheels. The handbooks list r; /archives//html/Amps/1998-03/msg00142.html (7,910 bytes)
15. [AMPS] Blowers (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Thu, 12 Mar 1998 01:33:51 +0000; This may be an over simplification, but I think Rich is alluding to it; Let's say you are measuring back pressure on an installed tube, utilizing a manometer. It seems to make sense that if the back; /archives//html/Amps/1998-03/msg00194.html (8,415 bytes)
16. Fwd: [AMPS] Benefit (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sat, 14 Mar 1998 05:36:19 +0000; and timing. and propagation. 73 Jay W7CW 1AB Ranch Gillette, Wyoming -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/1998-03/msg00263.html (8,727 bytes)
17. [AMPS] 572B's in a Centaur (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sat, 14 Mar 1998 05:38:51 +0000; Svetlana literature says their 572B is a plug-in replacement for the 811A, anyone try it in a Centaur yet? 73 Jay W7CW 1AB Ranch Gillette, Wyoming -- FAQ on WWW: http://www.contesting.com/ampfaq.html; /archives//html/Amps/1998-03/msg00264.html (6,660 bytes)
18. [AMPS] Phantom Capacitor (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Fri, 27 Mar 1998 02:17:35 +0000; Hi Guys, Here is an engineering question. Preface I'm playing with a triode that has approximately 35pF of plate capacitance. (3cpx5000a7 equivalent) The tube has a resonant load impedance of about 1; /archives//html/Amps/1998-03/msg00433.html (8,329 bytes)
19. [AMPS] Capacitor Identification (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Sat, 28 Mar 1998 00:53:06 +0000; I've got two ceramic doorknob caps that a friend gave me, stating they would make good blocker capacitors. They are both 7/8 inch thick, 2 3/8 inch diameter, white in color, with threaded holes for s; /archives//html/Amps/1998-03/msg00466.html (7,491 bytes)
20. [AMPS] Capacitor Identification (score: 1): Author: wc7m@vcn.com (W7CW Jay E Ostrem); Date: Tue, 31 Mar 1998 01:44:17 +0100; Hi John, Thanks for the info. Do you think these will be ok for bypass capacitors at the base of my plate choke then? They would be subject to 6000 volts, and would be grounding any stray 1.8 through; /archives//html/Amps/1998-03/msg00492.html (8,300 bytes)

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