Search String: Display: Description: Sort:

Results:

References: [ +from:jim@audiosystemsgroup.com: 209 ]

Total 209 documents matching your query.

1. Re: [Amps] TL922 Power Plugs (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 03 Nov 2009 07:49:45 -0800
Exactly right. One other VERY important point -- it is both ILLEGAL and UNSAFE to connect neutral to ground at any other point. The proper connection of a 240V load is to the two ends of the transfor
/archives//html/Amps/2009-11/msg00014.html (7,272 bytes)

2. Re: [Amps] IC-2KL 80m toroid value (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 28 Oct 2009 11:11:13 -0700
Perhaps by "common practice" at the time a particular product was built, but not "by definition." 73, Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com ht
/archives//html/Amps/2009-10/msg00344.html (7,829 bytes)

3. Re: [Amps] IC-2KL 80m toroid value (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 28 Oct 2009 08:46:34 -0700
Where is this coil in the circuit? In the input or the output? How is it "cooked?" Has the wire open circuited? Has the core cracked? Fair-Rite is the mfr of most ferrite materials sold in NA. Their
/archives//html/Amps/2009-10/msg00340.html (7,564 bytes)

4. Re: [Amps] Watts to DBM?? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 27 Sep 2009 14:39:38 -0700
It's actually pretty simple if you know logs. All dB values are ratios to some specified reference. The dBm means dB with 1 mW as a reference, and dB is 10 times the log of the ratio. Adding dB is li
/archives//html/Amps/2009-09/msg00346.html (9,977 bytes)

5. Re: [Amps] HL-2K (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 30 Aug 2009 20:35:52 -0700
http://audiosystemsgroup.com/publish Select the Tutorial about Power and Grounding for audio and video systems, or the Ham Interfacing power point. The stuff about power amps and neutrals is about ha
/archives//html/Amps/2009-08/msg00648.html (8,693 bytes)

6. Re: [Amps] peers (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 30 Aug 2009 20:25:53 -0700
That is part of the definition of a peer-reviewed publication. That is, the article is reviewed by experts in the field for technical accuracy. Contrary to what the popular and various interest group
/archives//html/Amps/2009-08/msg00647.html (8,058 bytes)

7. Re: [Amps] TENTEC TITAN 425 price? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 20 Aug 2009 09:12:01 -0700
Changes to the bandpass filters. For my two older amps that do work on 30M, with the 40M position of the bandswitch, the load control tunes at about 3 and the Tune control at about 0. All three of my
/archives//html/Amps/2009-08/msg00369.html (7,860 bytes)

8. Re: [Amps] TENTEC TITAN 425 price? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 19 Aug 2009 23:11:01 -0700
I own three of them, all bought used in good shape. I paid ZERO attention to the finish, and would not have paid a nickel for gold. These are good amps, fairly easy to work on, almost everything you
/archives//html/Amps/2009-08/msg00363.html (8,560 bytes)

9. Re: [Amps] Ten Tec Centaur 411 repair? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 18 Aug 2009 12:09:50 -0700
If you do a google search on "tentec centaur 411" the first page will get you a link to the manual on Ten Tec's website. The circuitry appears to be pretty straightforward discrete transistors and di
/archives//html/Amps/2009-08/msg00350.html (8,190 bytes)

10. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 11 Aug 2009 13:31:03 -0700
NO. NO! NO! The advice quoted below is NOT mine. My post took strong exception to the advice quoted below. You have a rather limited view of a world that far more varied than you imagine. I work in t
/archives//html/Amps/2009-08/msg00268.html (9,176 bytes)

11. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 11 Aug 2009 00:27:48 -0700
On Sun, 9 Aug 2009 22:59:50 -0700 (PDT), jimsmitheguard-a@yahoo.com wrote: You have a rather limited view of a world that far more varied than you imagine. I work in the world of pro audio, and there
/archives//html/Amps/2009-08/msg00262.html (9,903 bytes)

12. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 10 Aug 2009 09:51:03 -0700
In a properly wired circuit, current from the hot (phase) conductor returns on the neutral, so all of the associated magnetic field is contained entirely in the region between and immediately around
/archives//html/Amps/2009-08/msg00232.html (9,049 bytes)

13. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 09 Aug 2009 22:05:14 -0700
So far, that doesn't seem like it would take much to fix it. Simply put a modern 120V 3-wire cord on the 120V supply and plug it into a legal 120V outlet. If it was me, I would put that outlet in the
/archives//html/Amps/2009-08/msg00196.html (9,481 bytes)

14. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 09 Aug 2009 21:58:26 -0700
YES. The NEC is quite clear on this. It's a safety issue. There is a very good reason for pulling bigger wire if the circuit will be heavily loaded, and it isn't heat, it's regulation. Nearly all ele
/archives//html/Amps/2009-08/msg00194.html (9,086 bytes)

15. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 09 Aug 2009 21:49:15 -0700
Yes, if the ground is also #12 or larger. You can (and should) also change the outlets. Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con
/archives//html/Amps/2009-08/msg00193.html (8,254 bytes)

16. Re: [Amps] 240V Outlet (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 09 Aug 2009 09:31:27 -0700
It depends on how the power supply is wired. One good way to get 120 volts from a 240 volt circuit is by running that load (typically a cooling fan) from half of a center-tapped primary of the main p
/archives//html/Amps/2009-08/msg00148.html (8,452 bytes)

17. Re: [Amps] Titan quits query more (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 28 Jun 2009 14:00:01 -0700
, There is a 90% schematic, with notes, on my website. It might give you some troubleshooting ideas. The 10% that's left out is the RF input and output circuitry and switching. The power supply stuff
/archives//html/Amps/2009-06/msg00134.html (8,570 bytes)

18. Re: [Amps] toroidal transformers (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 25 Jun 2009 13:03:36 -0700
And hopefully less leakage flux? 73, Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-06/msg00119.html (6,919 bytes)

19. Re: [Amps] Titan quits query (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 24 Jun 2009 15:07:05 -0700
Two fuses on the power supply. They will occasionally blow, with the symptoms noted. I use standard 3AG or 3AB 15A fast blow fuses. They blow in pairs. I believe the manual calls for 20A, but when so
/archives//html/Amps/2009-06/msg00110.html (7,457 bytes)

20. Re: [Amps] HV switch-mode power supply (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 22 May 2009 20:28:40 -0700
Near San Francisco, my residential base rate is $0.115/kWh for 350 kWh per month during the summer. For the next 100 kWh per month, it jumps to $0.13, then to $0.23/kWh for 200 kWh, then to $0.325 fo
/archives//html/Amps/2009-05/msg00163.html (8,326 bytes)

Current List: 1 - 20
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

This search system is powered by Namazu