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1. [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: "doc@kd4e.com" <doc@kd4e.com>; Date: Fri, 15 Oct 2010 17:09:43 -0400; Anyone know if these things are RFI-quiet enough to be around a Ham shack? Tenma Heavy Duty 40 Amp Switch Mode Power Supply 72-7665 (727665) | MCM-Tenma Sale: $99. http://www.mcmelectronics.com/produ; /archives//html/RFI/2010-10/msg00039.html (6,889 bytes)
2. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: "Dale Svetanoff" <svetanoff@earthlink.net>; Date: Sat, 16 Oct 2010 20:54:42 -0500; Doc, I don't know about that particular switching power supply, but I do know that I have done a lot of business over the past 10+ years with MCM, and I have found them very good to deal with. Unless; /archives//html/RFI/2010-10/msg00040.html (9,719 bytes)
3. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: "doc@kd4e.com" <doc@kd4e.com>; Date: Sat, 16 Oct 2010 22:38:27 -0400; Thanks for the input! I am hoping to find someone with direct knowledge of this specific PS. The $99. sale price is good but not if it is either unreliable or RFI-troubled. I will see if I can get an; /archives//html/RFI/2010-10/msg00041.html (10,871 bytes)
4. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sat, 16 Oct 2010 23:04:15 -0400; I ran two 30 A Astrons, one with the meters and one without. Both failed within a year...actually the one with meters failed within about two weeks, but it was simple. The fan failed and it shut down; /archives//html/RFI/2010-10/msg00042.html (13,130 bytes)
5. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sat, 16 Oct 2010 23:07:18 -0400; Where did you find them for tht Doc? On the site I only find them listed for $249 For $99 I'm willing to purchase one to try. 73 Roger (K8RI) _______________________________________________ RFI maili; /archives//html/RFI/2010-10/msg00043.html (7,605 bytes)
6. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: Howard Lester <howard220@gmail.com>; Date: Tue, 19 Oct 2010 11:35:35 -0400; hearing noise every so-many KHz up and down all the bands and wondered if it was the power supply. I phoned the dealer (KJI Electronics), and Gene right off asked me if I was feeding my antenna with; /archives//html/RFI/2010-10/msg00053.html (8,376 bytes)
7. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: dgsvetan@rockwellcollins.com; Date: Tue, 19 Oct 2010 16:28:06 -0500; Howard, Since your use of a quote from my posting on power supplies started the whole ladder line thread, I thought I should weigh in with a few comments. First, we must keep in mind that "lower emis; /archives//html/RFI/2010-10/msg00070.html (14,629 bytes)
8. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 19 Oct 2010 18:05:57 -0400; I do. Two Jennings 75A @ 10KV vacuum relays form a knife switch at the antenna feed point in my outdoor, motorized ATU. When the shack ATU controller is powered on, the relays close. When I QRT, the; /archives//html/RFI/2010-10/msg00072.html (10,319 bytes)
9. [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: Howard Lester <howard220@gmail.com>; Date: Tue, 19 Oct 2010 18:25:00 -0400; Dale, Dale, Dale... I do appreciate the information and cautions and everything else you've taken the time to write so extensively. (No, I am * not* being sarcastic!) There will be no flames coming y; /archives//html/RFI/2010-10/msg00073.html (10,527 bytes)
10. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: Michael Coslo <mjc5@psu.edu>; Date: Tue, 19 Oct 2010 20:24:57 -0400; The individual performance of antennas notwithstanding, we usually end up putting the antenna up that will suit our needs and location. For instance, at our club mountaintop station, our dipoles for; /archives//html/RFI/2010-10/msg00075.html (10,993 bytes)
11. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: Howard Lester <howard220@gmail.com>; Date: Tue, 19 Oct 2010 20:46:09 -0400; I figure that, with my 140' antenna I am going to get some severe nulls on the higher bands, but that should mean I'm also getting some strong lobes. Whatever directions they're in is fine with me. B; /archives//html/RFI/2010-10/msg00076.html (9,565 bytes)
12. Re: [RFI] Noisy or Quiet Power Supplies? (score: 1): Author: dgsvetan@rockwellcollins.com; Date: Wed, 20 Oct 2010 09:45:42 -0500; Paul, Thanks for the reply comments. Your switching configuration is exactly the sort of scheme I had in mind for protecting the station when wire feeders are used. Over the years, I have just seen w; /archives//html/RFI/2010-10/msg00077.html (11,624 bytes)

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