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Total 645 documents matching your query.

1. [Amps] RF Concepts 440 Alignment (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 03 Sep 2005 00:01:48 -0500
I'm looking for an alignment procedure for the 100w RF Concepts 430- 440 brick amps. Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contes
/archives//html/Amps/2005-09/msg00012.html (6,638 bytes)

2. [Amps] 3CX800A7 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 03 Sep 2005 00:03:49 -0500
I'm looking for a source for these tubes. I remember seeing a distributor a year or so ago with a "ham price" for new Eimacs, but can't find it. Jim K9YC _____________________________________________
/archives//html/Amps/2005-09/msg00013.html (6,418 bytes)

3. Re: [Amps] CW and High Voltage (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 04 Sep 2005 08:03:23 -0500
It helps to read the FCC Rules. For the 50 years that I've been licensed they have REQUIRED us to use the minimum power needed to maintain communications. And, of course, if done judiciously, it can
/archives//html/Amps/2005-09/msg00041.html (8,602 bytes)

4. Re: [Amps] L-4B Switch (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 05 Sep 2005 14:22:05 -0500
A company I know from the pro audio world makes a product that addresses this problem. Check out the ICE modules made by SurgeX. www.surgex.com http://www.surgex.com/products/ice20.html They're well
/archives//html/Amps/2005-09/msg00062.html (7,259 bytes)

5. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 16 Sep 2005 16:27:25 -0500
Nothing prevents the use of CATx cable for RS232 control. Very easy to do, quite free of RFI issues, very low capacitance. Simply use one pair for each control circuit -- for example, orange to pin 2
/archives//html/Amps/2005-09/msg00159.html (9,212 bytes)

6. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 22 Sep 2005 05:11:06 -0500
using Another "advantage" of Ethernet is lots of birdies through the HF spectrum. If you're a CW guy, listen around 10.106, 10.120, 14,030, 21.052, 28.015, 50.118, etc. when you have Ethernet hardwar
/archives//html/Amps/2005-09/msg00284.html (10,099 bytes)

7. Re: [Amps] Power and Grounding White Paper (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 03 Oct 2005 11:20:45 -0500
Sounds good. Let me know if you would like me to do a guest lecture. Jim _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list
/archives//html/Amps/2005-10/msg00102.html (7,498 bytes)

8. [Amps] Antenna Tuner Overheating (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 15 Oct 2005 20:44:31 -0500
I'm seeing some overheating that can only be in one of two possible components. One is a TenTec 238 antenna tuner, the other is the loading coils in the antenna that I'm feeding with it. I've also ob
/archives//html/Amps/2005-10/msg00419.html (7,557 bytes)

9. Re: [Amps] AC wiring (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 19 Oct 2005 09:54:19 -0500
Yes and no. Remember that ALL electronic loads (that is, anything with a DC power supply) utilize some form of rectifier and capacitor-input filter. This includes switching power supplies. Thus curre
/archives//html/Amps/2005-10/msg00463.html (9,799 bytes)

10. Re: [Amps] AC wiring (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 21 Oct 2005 22:43:10 -0500
There may be some supplies of the type you describe, but the vast majority are of the type I described. I think that if you hang a current clamp and a scope on most circuits you will see harmonics, a
/archives//html/Amps/2005-10/msg00529.html (9,225 bytes)

11. [Amps] Breakers, Fuses, Tripping, and Wire Size (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 22 Oct 2005 08:53:51 -0500
There are many different kinds of fuses and breakers. One of the major differences is how quickly they trip with current over their nameplate rating. Lots of electrical loads draw high "in-rush" curr
/archives//html/Amps/2005-10/msg00532.html (8,966 bytes)

12. Re: [Amps] titan amp (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 23 Oct 2005 20:23:58 -0500
It depends a lot on the quality and pedigree of the tubes, and how they have been treated. I bought one about 18 months ago that had original tubes that had been treated well, but they were more than
/archives//html/Amps/2005-10/msg00554.html (7,594 bytes)

13. [RFI] Toyota SUV's For Mobile? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 30 Oct 2005 19:50:33 -0500
I'm thinking that I want to buy a Toyota Sequoia (an SUV on their Tundra truck frame) or Land Cruiser. Does anyone have HF mobile experience with either of these (or other big Toyotas or equivalent L
/archives//html/Amps/2005-10/msg00705.html (6,622 bytes)

14. Re: [Amps] Question about safety ground connection (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 14 Nov 2005 14:31:41 -0600
Nothing as fundamental as this is going to change. But we're here to learn from each other and answer questions. At least I am. 73, Jim K9YC _______________________________________________ Amps maili
/archives//html/Amps/2005-11/msg00180.html (8,273 bytes)

15. Re: [Amps] Question about safety ground connection (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 15 Nov 2005 10:26:25 -0600
There is nothing wrong with connecting a 120 volt load (for example, a 120v fan) between one of the 240 volt legs and neutral. What you must NOT do is connect the neutral to ground. Jim _____________
/archives//html/Amps/2005-11/msg00188.html (9,494 bytes)

16. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 16 Nov 2005 07:22:00 -0600
safety NO, NO, NO, NO, NO! Neutral is intended to carry current (although it is not used in the 240 volt circuits in homes). Ground is a PROTECTIVE conductor that should NOT carry current except in t
/archives//html/Amps/2005-11/msg00238.html (12,284 bytes)

17. Re: [Amps] difference between 2,3,4 and 43, 45, ... materials? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 27 Nov 2005 13:11:59 -0600
Sorry to be late in responding -- I've been on the road. There's a tutorial on ferrites on my website. Select the two documents about RF interference. One is directed to audio, but has the best tutor
/archives//html/Amps/2005-11/msg00497.html (8,240 bytes)

18. Re: [Amps] difference between 2,3,4 and 43, 45, ... materials? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 28 Nov 2005 13:08:44 -0600
Not necessarily. Pin 1 problems in consumer audio and A/V gear will be excited by HF antenna current flowing on the shield of MATV and CATV coaxial cables. The coaxial downleads etc. are excellent re
/archives//html/Amps/2005-11/msg00507.html (8,420 bytes)

19. Re: [Amps] difference between 2,3,4 and 43, 45, ... materials? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 29 Nov 2005 00:32:37 -0600
Coming in on the line cord, or the antenna current finding its counterpoise through the power system's safety ground? It could be either. When you stick a choke on the power line, you are breaking (o
/archives//html/Amps/2005-11/msg00514.html (9,060 bytes)

20. [Amps] Need Vacuum Relay (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 04 Dec 2005 07:43:29 -0600
I need a vacuum relay for a Hercules II. It's a Kilovac K41C234. Any good sources (other than TenTec)? Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com h
/archives//html/Amps/2005-12/msg00017.html (6,791 bytes)


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