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Total 7 documents matching your query.

1. [Amps] L-4PS Transformer Buzz (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Mon, 15 Feb 2010 09:41:56 -0800; I just installed the Harbach PM-400 in the L-4PS power supply for one of my Drake L-7 amps after I popped a rectifier diode in the old bridge: http://www.harbachelectronics.com/main/page_products_dra; /archives//html/Amps/2010-02/msg00408.html (7,265 bytes)
2. Re: [Amps] L-4PS Transformer Buzz (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 15 Feb 2010 13:05:59 -0500; Could be a bad cap, one installed wrong (it will blow eventually but it will get real warm first), missing, miswired or bad equalizing resistor. The transformer is trying to tell you to stop! Carl KM; /archives//html/Amps/2010-02/msg00409.html (9,064 bytes)
3. [Amps] L-4PS Transformer Buzz (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Mon, 15 Feb 2010 18:47:42 +0000; I've seen this many times when a diode shorts out, even car alternators "whine" when one diode shorts out. -- Ron KA4INM - He who attacks the fundamentals of the American broadcasting industry attac; /archives//html/Amps/2010-02/msg00410.html (7,855 bytes)
4. Re: [Amps] L-4PS Transformer Buzz (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Mon, 15 Feb 2010 10:49:33 -0800; Carl/Dick, et al. I triple checked the polarity of the caps before I put the cover on the PS and they are installed properly. Also, I didn't see any swelling or smell anything from the PWB after I fi; /archives//html/Amps/2010-02/msg00411.html (7,716 bytes)
5. Re: [Amps] L-4PS Transformer Buzz (score: 1): Author: Steve Thompson <g8gsq@f2s.com>; Date: Tue, 16 Feb 2010 07:38:55 +0000; Monitoring the primary line current might indicate if it's mechanical or electrical in origin. Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists; /archives//html/Amps/2010-02/msg00430.html (7,323 bytes)
6. Re: [Amps] L-4PS Transformer Buzz (score: 1): Author: Ryan Foster <foster.ryan@gmail.com>; Date: Thu, 25 Mar 2010 11:05:19 -0400; Mike, Did you ever find a solution to this? I have also just developed the same problem and can find no electrical reason for it, and I honestly don't understand any mechanical reason for it to searc; /archives//html/Amps/2010-03/msg00614.html (8,055 bytes)
7. Re: [Amps] L-4PS Transformer Buzz (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Fri, 26 Mar 2010 23:28:43 -0700; No, Ryan, I haven't had the time to fiddle with it. The buzz comes and goes on my supply. It was very loud the other day, but mostly it is not too bad. The buzz is almost always silent when I turn on; /archives//html/Amps/2010-03/msg00678.html (9,697 bytes)

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