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141. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sun, 21 Mar 2021 16:31:47 -0400; Hi Gary, Not sure if I can do attachments on this reflector, but attached is a screen shot showing the quick audio analysis I did on your recording that I previously mentioned. The red cursor lines a; /archives//html/RFI/2021-03/msg00079.html (14,466 bytes)
142. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Mon, 22 Mar 2021 15:24:15 -0400; Hi Dave, I still recommend tuned and untuned loops to folks on an almost daily basis but they definitely dont shed as much light on the situation as a unidirectional antenna does. It would be nice to; /archives//html/RFI/2021-03/msg00083.html (20,091 bytes)
143. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Tue, 23 Mar 2021 15:11:11 -0400; Hi Mike, Gary, and gang, Well after seeing Garys shielded un-tuned loop, I watched the video on how to build that loop. I just built one almost identical to his loop but used RG-58 coax since that's; /archives//html/RFI/2021-03/msg00092.html (29,282 bytes)
144. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Tue, 23 Mar 2021 17:33:47 -0400; Hi Gary and gang, Let me go back and clarify my previous statement about your shielded loop as I just did more testing on higher frequencies. Down in the AM broadcast band your loop based on my using; /archives//html/RFI/2021-03/msg00095.html (32,819 bytes)
145. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Wed, 24 Mar 2021 14:00:43 -0400; Hi Gary, Thanks for the update, and I also went crazy today and ran more tests using my version of your un-tuned shielded loop. I always enjoy learning, and your situation is interesting and I have n; /archives//html/RFI/2021-03/msg00109.html (33,266 bytes)
146. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Wed, 24 Mar 2021 15:21:28 -0400; Hi Jim, I just went back and looked at the audio on Garys recording using a real benchtop oscilloscope instead of a software based audio scope. I'm seeing an obvious burst of noise at a rate of 60 Hz; /archives//html/RFI/2021-03/msg00111.html (13,028 bytes)
147. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Wed, 24 Mar 2021 23:23:03 -0400; Hi Dave, The W7IUV preamp is a great preamp and it actually works just fine with a 9 volt alkaline battery for portable use and it's what I've historically used with my tuned loops and portable flag.; /archives//html/RFI/2021-03/msg00118.html (40,718 bytes)
148. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Thu, 25 Mar 2021 07:32:42 -0400; Hi Gary, You might also consider the DX Engineering preamp which offers about 10 dB more gain than the W7IUV preamp and it has built in attenuators which come in very handy as you approach the source; /archives//html/RFI/2021-03/msg00119.html (39,506 bytes)
149. Re: [RFI] New Interference at kk0sd (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Fri, 26 Mar 2021 07:40:13 -0400; Hi Gary, While waiting for your upcoming weekend testing I did more investigation into why the un-tuned shielded loop you use appears to have such low sensitivity on MF and lower HF frequencies compa; /archives//html/RFI/2021-03/msg00121.html (12,836 bytes)
150. Re: [RFI] Flag Pennant loop - added benefit of being broadband (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Mon, 12 Apr 2021 18:10:33 -0400; Hi Alan, Thanks for posting about my portable flag for direction finding. I was trying to stay silent on this post, but thought I would provide a link to a simple website I have that provides more in; /archives//html/RFI/2021-04/msg00119.html (17,050 bytes)
151. Re: [RFI] Flag Pennant loop - Tiny SA use (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Mon, 12 Apr 2021 21:03:21 -0400; Hi Lee, I've gotten a little lost in this thread, but if you intend to use the tinySA with the Portable Flag I would like to comment about the placement of the attenuators relative to a preamp. I was; /archives//html/RFI/2021-04/msg00126.html (13,468 bytes)
152. [RFI] Interesting case of RFI (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Tue, 20 Apr 2021 08:41:57 -0400; Two weekends ago I tracked down some RFI that was very strong at the QTH of Justin (KD9PLD), and thought I would share a link to my unlisted youtube video that documents the case for those interested; /archives//html/RFI/2021-04/msg00174.html (7,822 bytes)
153. Re: [RFI] Interesting case of RFI (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Wed, 21 Apr 2021 10:20:33 -0400; Hi Chris, Below (between the dashed lines) is the gist of the note I leave people if I believe their property is causing interference at my house, or the information I have other hams leave if the RF; /archives//html/RFI/2021-04/msg00189.html (14,215 bytes)
154. Re: [RFI] LED lighting fixtures - (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Mon, 24 May 2021 10:37:17 -0400; Hi Gary, My following comments don't answer Hank's question, but they are related to your topic of LED tube lights. I replaced my magnetic ballast driven tubes that hang over my electronics workbench; /archives//html/RFI/2021-05/msg00064.html (10,174 bytes)
155. Re: [RFI] LED lighting fixtures - (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Thu, 27 May 2021 22:35:50 -0400; Hi Gary (and Frank), I purchased a 4 pack of the Hyperikon HyperBY-4C-406 (SKU 841100608) LED tubes based on Franks experience and I have good and bad news. The good news is that the new LED tubes do; /archives//html/RFI/2021-05/msg00110.html (10,401 bytes)
156. Re: [RFI] Noise to identify (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Mon, 7 Jun 2021 06:56:24 -0400; Hi Hugo, Quickly looking at your waterfall display on 160 and 80 meters, it looks like a repeating pattern at a frequency of approximately 6 KHz, and also a comb pattern at a frequency of approximate; /archives//html/RFI/2021-06/msg00015.html (11,825 bytes)
157. Re: [RFI] ? Goodman HVAC 3 ton 16 SEER Dual Stage Heat Pump (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Wed, 16 Jun 2021 19:30:14 -0400; Hi John, Go search the RFI Archives at http://lists.contesting.com/_rfi/ I did a quick search on the term HVAC and there is a long list of postings on this subject. I quickly found one that indeed do; /archives//html/RFI/2021-06/msg00046.html (8,175 bytes)
158. Re: [RFI] Noise located and FIXED (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sat, 19 Jun 2021 16:53:38 -0400; Hi Dave, Thanks for sharing and great story. How far from your QTH was the bad pole and how close to the pole when you had to switch to VHF? The more you use the portable flag the more comfortable yo; /archives//html/RFI/2021-06/msg00060.html (11,003 bytes)
159. Re: [RFI] Noise located and FIXED (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Sat, 19 Jun 2021 17:46:45 -0400; Hi Dave, Fantastic, and you got plenty close before switching to VHF. I typically switch to VHF when Im typically within 0.1 or 0.2 miles from the faulty pole. I have sometimes heard power line noise; /archives//html/RFI/2021-06/msg00063.html (13,794 bytes)
160. Re: [RFI] RFI consultant (score: 1): Author: Don Kirk <wd8dsb@gmail.com>; Date: Tue, 13 Jul 2021 22:20:03 -0400; Hi Scott, I can't answer your question about a consultant, but let me make some comments based on a few cases of VFD and AC Servo Drive interference I've had to deal with as a ham as well as some of; /archives//html/RFI/2021-07/msg00046.html (10,405 bytes)

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