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Total 19 documents matching your query.

1. [RFI] DC Power supplies (score: 1): Author: charlie@thegallos.com; Date: Wed, 4 May 2016 14:51:43 -0400; Hey Gang, We all know about buying old analog wall warts for power supplies to cut down on RFI, but sometimes, that is NOT going to happen With the proliferation of things like LED strip lights, whic; /archives//html/RFI/2016-05/msg00015.html (7,566 bytes)
2. Re: [RFI] DC Power supplies (score: 1): Author: Doug Powell <dougp01@gmail.com>; Date: Wed, 4 May 2016 13:34:21 -0600; Charlie, I have worked in regulatory product compliance for many years and the information you seek is not readily available on most manufacturer's data sheets. As you probably already know, having a; /archives//html/RFI/2016-05/msg00016.html (10,794 bytes)
3. Re: [RFI] DC Power supplies (score: 1): Author: Bill Steffey NY9H <ny9h@arrl.net>; Date: Wed, 04 May 2016 16:34:30 -0400; 5 years ago I redid the kitchen with under cabinet lighting from Lowes.... it was their "ultratech" or such label for electrical products..... GREAT broadband transmitters,,, AND my antenna tower is; /archives//html/RFI/2016-05/msg00017.html (7,439 bytes)
4. Re: [RFI] DC Power supplies (score: 1): Author: "David Harmon" <k6xyz@sbcglobal.net>; Date: Wed, 4 May 2016 15:57:41 -0500; DX Engineering has a good AC Adapter (wart). I have several and they are noiseless....I think they have a transformer. 73 David Harmon K6XYZ Sperry, OK 5 years ago I redid the kitchen with under cabi; /archives//html/RFI/2016-05/msg00018.html (8,673 bytes)
5. Re: [RFI] DC Power supplies (score: 1): Author: WD8ARZ <wd8arz@ix.netcom.com>; Date: Wed, 4 May 2016 17:14:27 -0400; AC switching type power supplies tend to be very rfi noisy. Transformer type power supplies dont use the the dc to ac to dc switching that generate that RFI .... and should be quieter power supplies.; /archives//html/RFI/2016-05/msg00019.html (8,130 bytes)
6. Re: [RFI] DC Power supplies (score: 1): Author: Doug Powell <dougp01@gmail.com>; Date: Wed, 04 May 2016 15:59:24 -0600; There is no such thing as a "noise free" switcher, only unaffected equipment. The quietest switching power supplies tend to be medical grade. You don't want RFI affecting life support equipment.; /archives//html/RFI/2016-05/msg00020.html (10,962 bytes)
7. Re: [RFI] DC Power supplies (score: 1): Author: "Charlie@thegallos.com" <charlie@thegallos.com>; Date: Wed, 4 May 2016 18:16:29 -0400; Actually, mumble mumble years ago, I worked on switchers that had, for all intents no measurable noise in both the RE and CE range of test from Mil-810. Of course the USN was spending major money for; /archives//html/RFI/2016-05/msg00021.html (12,147 bytes)
8. Re: [RFI] DC Power supplies (score: 1): Author: Doug Powell <dougp01@gmail.com>; Date: Wed, 4 May 2016 17:07:52 -0600; You are absolutely correct. Although it is not possible to be dead quiet, with enough filtering, shielding, and RF absorbers it is possible to reduce your RF signature to extremely low levels. I have; /archives//html/RFI/2016-05/msg00022.html (14,135 bytes)
9. Re: [RFI] DC Power supplies (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Fri, 6 May 2016 12:06:01 -0400; A couple years ago, I purchased a 30A switching supply with adjustable voltage on an introductory sale price. I wish I'd purchased two as they are now over double the price. Voltage and current are d; /archives//html/RFI/2016-05/msg00028.html (12,328 bytes)
10. Re: [RFI] DC Power supplies (score: 1): Author: Ken Winterling <wa2lbi@gmail.com>; Date: Fri, 6 May 2016 13:14:20 -0400; If you are looking for RF-quiet switching power supplies to run HF and VHF/UHF rigs you should take a look at what IOTA has to offer. ( http://www.iotaengineering.com/dls.htm). They make small. light; /archives//html/RFI/2016-05/msg00029.html (15,306 bytes)
11. Re: [RFI] DC Power supplies (score: 1): Author: "David Harmon" <k6xyz@sbcglobal.net>; Date: Fri, 6 May 2016 12:26:30 -0500; +1 for that Ken. I have 2 of the DLS 55 units and they are very reliable. I use them to power model airplane battery chargers so the IOTA's run constantly at 54A just inside their current rating with; /archives//html/RFI/2016-05/msg00030.html (16,580 bytes)
12. Re: [RFI] DC Power supplies (score: 1): Author: "qrv@kd4e.com" <qrv@kd4e.com>; Date: Fri, 06 May 2016 13:33:39 -0400; Ditto on the IOTA supplies with the IQ4 charge manager. I've had one floating across a large deep-cycle marine battery for years - it supplies clean 12VDC to all of the 12v devices in the radio room.; /archives//html/RFI/2016-05/msg00031.html (11,610 bytes)
13. Re: [RFI] DC Power supplies (score: 1): Author: Michael Coslo <mcoslo@comcast.net>; Date: Fri, 6 May 2016 13:40:42 -0400; My Alinco switcher only throws out discernible RFI on the US AM Broadcast band, above that, its very quiet. The way I found it was adjusting the switcher frequency while watching the display on my Fl; /archives//html/RFI/2016-05/msg00032.html (14,914 bytes)
14. Re: [RFI] DC Power supplies (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sun, 8 May 2016 04:04:15 -0400; That quiet power supply is a Tenma 40A with adjustable voltage. It was sold by the same company that sells Rigol. I have A Rigol spectrum analyzer. 73 Roger (K8RI) A couple years ago, I purchased a 3; /archives//html/RFI/2016-05/msg00033.html (9,371 bytes)
15. Re: [RFI] DC Power supplies (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 8 May 2016 22:10:15 -0700; Hmmm -- the power supply in my Rigol puts out enough RF noise that I can see it on an inductive probe. Rather disappointing if you're trying to use it to evaluate noise in a product. When I discussed; /archives//html/RFI/2016-05/msg00034.html (9,405 bytes)
16. Re: [RFI] DC Power supplies (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 10 May 2016 10:22:54 -0700; As NY9H observed, it also depends on proximity to antennas. Several years ago, as an increasing number of products entered my home and shack with switching wall warts, I adopted the practice of repla; /archives//html/RFI/2016-05/msg00046.html (10,241 bytes)
17. Re: [RFI] DC Power supplies (score: 1): Author: Charlie Gallo <Charlie@TheGallos.com>; Date: Sat, 14 May 2016 10:05:48 -0400; <snip> As I said when I pretty much started this thread, I got a bunch of power supplies that were put in when my kitchen was redone and they were noise bombs on 40m (my lot is 42x100, and I'm runnin; /archives//html/RFI/2016-05/msg00057.html (10,078 bytes)
18. Re: [RFI] DC Power supplies (score: 1): Author: Bill Price <billp7634@sbcglobal.net>; Date: Sat, 14 May 2016 18:08:16 +0000 (UTC); Just what is your take on this review that I found online on this supply? 1.0 out of 5 starsThis item is definitely not UL listed and this is ... By Everett Schwartz on December 5, 2015 Verified Purc; /archives//html/RFI/2016-05/msg00058.html (11,446 bytes)
19. Re: [RFI] DC Power supplies (score: 1): Author: Charlie Gallo <Charlie@TheGallos.com>; Date: Sat, 14 May 2016 18:16:20 -0400; Interesting Mine used a "standard" power cord (on of those figure 8 style) on the input I just looked for the typos, and they are there) -- 73 de KG2V - Charles Gallo Quality Custom Machine-shop work; /archives//html/RFI/2016-05/msg00059.html (8,596 bytes)

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