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141. Re: [RFI] DigiKeyer II (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 19 Dec 2013 14:42:59 -0600 (GMT-06:00); Peter, You mention use of braid to the ground rod outside. That's OK if the braid is encased within some sort of weather-proof cover, such as shrink tubing. The problem with braid that is exposed to; /archives//html/RFI/2013-12/msg00106.html (10,012 bytes)
142. Re: [RFI] DigiKeyer II (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 19 Dec 2013 17:22:23 -0600 (GMT-06:00); Peter, Good question. Answer: it depends. If you can connect a DMM or VOM between the shack ground bus and the ground rod outside, TURN OFF ALL POWER to the connected equipment and take a reading. If; /archives//html/RFI/2013-12/msg00113.html (11,086 bytes)
143. Re: [RFI] Daisy-chain grounding [was DigiKeyer II] (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 21 Dec 2013 11:02:05 -0600 (GMT-06:00); Kurt, See my inserted comments. 73, Dale WA9ENA --Original Message-- - - - - - - - - - - - - - OK, but I have 3 ground rods around the concrete foundation for each of my 3 towers. The big tower (for; /archives//html/RFI/2013-12/msg00119.html (13,217 bytes)
144. Re: [RFI] Daisy-chain grounding [was DigiKeyer II] (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 21 Dec 2013 11:23:07 -0600 (GMT-06:00); Anthony, Please see my inserted comments below. 73, Dale WA9ENA --Original Message-- - - - - - - - - - - - Your setup is nearly identical to mine. The main difference is that I had to integrate 3 tow; /archives//html/RFI/2013-12/msg00120.html (19,155 bytes)
145. Re: [RFI] LED Bulbs (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 10 Feb 2014 18:30:59 -0600 (GMT-06:00); Dale, I totally agree with your statement about being "all over the ball park" with these devices. Also, I do remember Mike's original postings several months ago about those nasty yard lights that b; /archives//html/RFI/2014-02/msg00024.html (17,654 bytes)
146. Re: [RFI] LED Bulbs (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Tue, 11 Feb 2014 21:25:01 -0600 (GMT-06:00); David, In a word - yes. If the LEDs each have a switching power supply/driver, then changing to plain incandescent or halogen bulbs would eliminate all of those RFI generators. 73, Dale WA9ENA --Orig; /archives//html/RFI/2014-02/msg00036.html (10,379 bytes)
147. Re: [RFI] LED Bulbs (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Wed, 12 Feb 2014 10:18:02 -0600 (GMT-06:00); David, The biggest problem in trying to do what you suggest is CO$T. Here is why: 1. LEDS are low voltage devices and have poor PIV diode characteristics. To drive them directly from a "good" lamp di; /archives//html/RFI/2014-02/msg00053.html (11,029 bytes)
148. Re: [RFI] LED Bulbs (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Wed, 12 Feb 2014 11:37:10 -0600 (GMT-06:00); Gary, Short answer to your question: NO. "Hospital grade" is a SAFETY issue, not an RFI issue. Those green dots on hospital grade electrical connectors and equipment means that the items have met cer; /archives//html/RFI/2014-02/msg00066.html (13,854 bytes)
149. Re: [RFI] LED Bulbs (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 13 Feb 2014 11:55:47 -0600 (GMT-06:00); Eddie, Well said. I also want to clear up a point that you addressed to a certain extent. Regarding extra testing, filtering, or whatever, the FACTS are that the emission limits of Part 15 for Classe; /archives//html/RFI/2014-02/msg00081.html (16,504 bytes)
150. Re: [RFI] DSP for a noisy environment (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Fri, 21 Feb 2014 16:25:00 -0600 (GMT-06:00); Bruce, You certainly have difficult circumstances. The usual suggestions are to get rid of (or reduce) the external interference. I understand that you can not. Two thoughts come to mind: 1. Use digi; /archives//html/RFI/2014-02/msg00117.html (10,468 bytes)
151. Re: [RFI] Noise... (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Thu, 13 Mar 2014 11:00:10 -0500 (GMT-05:00); Jim and All, Although I have not had the need to use it for RFI hunting, my Icom IC-91A HT does include a "DC to daylight" integral receiver with selectable mode. It tunes below the AM b'cast band an; /archives//html/RFI/2014-03/msg00027.html (9,135 bytes)
152. Re: [RFI] The Part 15 issue (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Fri, 21 Mar 2014 17:19:14 -0500 (GMT-05:00); Daniel, First, I applaud the fact that you seem to be the first (or one of very few) manufacturers (or former manufactures, in your case) to address some comments on the topic. As an EMC engineer and; /archives//html/RFI/2014-03/msg00098.html (24,089 bytes)
153. Re: [RFI] ARRL to FCC... (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Fri, 21 Mar 2014 17:42:11 -0500 (GMT-05:00); Kelly, Please consider that the neighbor's $1000 TV MIGHT actually meet standards. Can the ham prove that it doesn't? THAT's the problem. In that case, the solution to the RFI situation has 6 answers; /archives//html/RFI/2014-03/msg00099.html (13,284 bytes)
154. Re: [RFI] An inverter question or two. (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Fri, 21 Mar 2014 17:53:01 -0500 (GMT-05:00); Ken, If I may, I'd like to suggest a non-inverter approach, since your output power requirements are quite modest: How about an audio amplifier approach? There are numerous low power (5 to 30 watt or; /archives//html/RFI/2014-03/msg00100.html (9,772 bytes)
155. Re: [RFI] Icom Switching Power Supplies (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 22 Mar 2014 10:27:18 -0500 (GMT-05:00); Leonard, I use an Astron SS-30M, which is very RF-quiet. There have been reports of other switchers, notably those in the base of CFLs, creating a noise increase prior to failure. You may very well b; /archives//html/RFI/2014-03/msg00117.html (9,586 bytes)
156. Re: [RFI] Ott filter (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Sat, 22 Mar 2014 10:56:16 -0500 (GMT-05:00); Ken, Sadly, building EFFECTIVE filters is not an easy (nor inexpensive) task. Commercially, there are high performance filters that start serious attenuation at either 10 kHz or 14 kHz, and then ther; /archives//html/RFI/2014-03/msg00120.html (9,445 bytes)
157. Re: [RFI] "Quiet" RS 75 watt inverter (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 24 Mar 2014 16:30:56 -0500 (GMT-05:00); Ken and David, Getting to a low residual noise level on 40 thru 160 is not easy, for sure. However, it is possible and I guess I am among the fortunate to have achieved that, although I have sincere; /archives//html/RFI/2014-03/msg00165.html (11,970 bytes)
158. Re: [RFI] Quiet 24V charger needed (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Tue, 25 Mar 2014 16:55:48 -0500 (GMT-05:00); Another good source of linear wall warts is Jameco Electronics (many in their catalog). Marlin P Jones & Assoc, also have linear supplies in their catalog. They do a good job of telling you which ite; /archives//html/RFI/2014-03/msg00182.html (8,418 bytes)
159. Re: [RFI] T8 4 bulb Fluorescent ballast needed (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Wed, 26 Mar 2014 22:52:22 -0500 (GMT-05:00); Gary, I do not know if it would help your situation or not, but in my prior work, I discovered that Advance Transformer (or the name might be "Advanced Magnetics", not sure), located in the Chicago a; /archives//html/RFI/2014-03/msg00212.html (10,468 bytes)
160. Re: [RFI] ARRL to FCC... (score: 1): Author: Dale <svetanoff@earthlink.net>; Date: Mon, 31 Mar 2014 09:56:16 -0500 (GMT-05:00); Ed, Your comments about testing of fixtures are of great interest to me. You may have seen a posting I made a few days ago regarding a replacement fluorescent fixture that creates much more RFI than; /archives//html/RFI/2014-03/msg00311.html (13,446 bytes)

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