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References: [ +from:donovanf@starpower.net: 99 ]

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81. Re: [RFI] 160m spur (score: 1): Author: Frank Donovan <donovanf@starpower.net>; Date: Wed, 11 Jan 2023 01:10:43 -0500 (EST); Hello Mac, Usual is correct, but the 1940 kHz intermod is not a usual case. The intermod on 1940 kHz is being heard hundreds of miles away, far from very strong signals that might cause 1940 kHz inte; /archives//html/RFI/2023-01/msg00065.html (11,871 bytes)
82. Re: [RFI] 160m spur (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Wed, 11 Jan 2023 12:25:21 -0500 (EST); Hi Tim, Unfortunately the chief engineer of the two stations is unavailable at the moment because of a recent stroke. WA2SQQ lives only six miles from the two stations and is highly competent in the; /archives//html/RFI/2023-01/msg00071.html (17,543 bytes)
83. Re: [RFI] Replacing Fluorescent Lights (4x2) with LED (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Mon, 3 Apr 2023 11:24:51 -0400 (EDT); Hi Chuck, Years ago I removed the ballasts and replaced my old 4 foot and 2 foot florescent tubes in my drop ceiling fixtures and replaced them with 120 volt LED tubes and never had a trace of RFI. I; /archives//html/RFI/2023-04/msg00003.html (8,007 bytes)
84. Re: [RFI] Keyboard RFI (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Fri, 28 Jul 2023 02:12:43 -0400 (EDT); Its poor EMC practice to bundle coaxial cables carrying transmitter power levels with cables carrying low level signals. Coax carrying transmitter power levels should separated by at least a few inch; /archives//html/RFI/2023-07/msg00057.html (7,929 bytes)
85. Re: [RFI] Wide noise on 20 meters, earlier today... (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Fri, 15 Sep 2023 10:23:48 -0400 (EDT); Gary, Given the limited amount of information you provided (a spectrum waterfall shot would be much more revealing), it seems likely that you hears the I happened to be listening to a roundtable QSO; /archives//html/RFI/2023-09/msg00031.html (8,732 bytes)
86. Re: [RFI] Wide noise on 20 meters, earlier today... (score: 1): Author: Frank Donovan <donovanf@starpower.net>; Date: Fri, 15 Sep 2023 10:28:31 -0400 (EDT); Gary, Given the limited amount of information you provided (a spectrum waterfall shot would be much more revealing), it seems likely that you heard the 500 KW Pluto II OTH radar on Cyprus. It and its; /archives//html/RFI/2023-09/msg00032.html (8,648 bytes)
87. Re: [RFI] Weird RFI Episode (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Sun, 24 Sep 2023 19:15:42 -0400 (EDT); Hi Pete, As you know, that's exactly why I recommend that PL-259 connectors always be lightly wrench tightened, just enough to make it not removable by hand, no more. Next, check you entire station t; /archives//html/RFI/2023-09/msg00041.html (7,903 bytes)
88. Re: [RFI] Weird RFI Episode (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Sun, 24 Sep 2023 23:19:25 -0400 (EDT); Hi Pete, A PL-259 backed 1/16th of a turn from fully hand tightened is a very unreliable connector. Get in the habit of tightening all of your PL-259s just tight enough so they cannot be loosened by; /archives//html/RFI/2023-09/msg00043.html (9,247 bytes)
89. Re: [RFI] How to approach a neighbor? (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Tue, 26 Sep 2023 18:23:22 -0400 (EDT); Hi Dave, I've successfully resolved a few of these RFI cases. Key to my success was identifying another neighbor who knew the family I needed to approach. Surely someone in your neighborhood knows th; /archives//html/RFI/2023-09/msg00055.html (8,535 bytes)
90. Re: [RFI] Filtering 220VAC : Success (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Fri, 20 Oct 2023 15:26:12 -0400 (EDT); Please be very careful about applying W9IP's experience before his good advice causes major property loss or someone gets badly hurt or worse... Capacitors must never -- must never! -- be connected t; /archives//html/RFI/2023-10/msg00025.html (13,720 bytes)
91. Re: [RFI] Filtering 220VAC : Success (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Fri, 20 Oct 2023 17:59:56 -0400 (EDT); Hi Mike, Sorry, but I do not know,but it would seem highly unlikely that a new product would use capacitors not safe for use on AC power 73 Frank W3LPL Hi Frank, Do you know if the widely available C; /archives//html/RFI/2023-10/msg00036.html (19,396 bytes)
92. Re: [RFI] Constant carrier on 7025 (score: 1): Author: Frank Donovan <donovanf@starpower.net>; Date: Fri, 10 Nov 2023 19:43:20 -0500 (EST); Thanks to all of the reports on rfi@contesting.com, the carrier on 7025 is reported to be off the air 73 Frank W3LPL The stepped carrier does not fade due to ionospheric modulation at the same rate o; /archives//html/RFI/2023-11/msg00075.html (15,572 bytes)
93. Re: [RFI] Sources of wideband hiss (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Sat, 23 Dec 2023 14:19:58 -0500 (EST); Like all other RFI, the first steps are 1. turn off all AC power in your own home and turn off all UPSes. If the noise disappears, you can use your circuit breakers as a next step in isolating the RF; /archives//html/RFI/2023-12/msg00003.html (8,082 bytes)
94. Re: [RFI] Sources of wideband hiss (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Sat, 23 Dec 2023 22:43:24 -0500 (EST); Michael, Its not adequate to determine the direction of the RFI, that phase of investigation is not complete until you determine the location of the RFI source. A small 2 meter antenna and hand porta; /archives//html/RFI/2023-12/msg00021.html (10,221 bytes)
95. Re: [RFI] USB Cable Shield Resistance was: Re: [N1MM+] open question about RFI & USB (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Tue, 16 Jan 2024 19:19:23 -0500 (EST); This is an excellent and very readable cable and connector EMC reference www.emcstandards.co.uk/files/part_2_text_and_graphics_21_may_09.pdf It covers many of the most important cable and connector E; /archives//html/RFI/2024-01/msg00014.html (11,242 bytes)
96. Re: [RFI] Source power pole located - but wonder which components most likely temperature sensitive (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Tue, 30 Jan 2024 15:34:47 -0500 (EST); Hi Joe, Your method comes with significant risk to yourself and others... Here's my story. During a CQWW 160 contest circa 1980 we had intense RFI pop up during Saturday night. I quickly isolated it; /archives//html/RFI/2024-01/msg00069.html (19,813 bytes)
97. Re: [RFI] Mysterious K3 Symptoms - RFI? (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Wed, 13 Mar 2024 10:29:22 -0400 (EDT); Do these symptoms occur with a dummy load? Operating in this morning's CWT, and saw a recurrence of strange RFI-like symptoms. After transmitting, RX gain sometimes was severely reduced, but simply; /archives//html/RFI/2024-03/msg00021.html (8,778 bytes)
98. Re: [RFI] New RFI Source (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Mon, 27 May 2024 19:08:03 -0400 (EDT); Hi Scott RFI propagating from a source close to the ground (less than about 1/4 wavelength high) is always vertically polarized unless the ground is extremely nonconductive. 73 Frank W3LPL I've track; /archives//html/RFI/2024-05/msg00013.html (9,264 bytes)
99. Re: [RFI] Replacement For Fluorescent Tubes (score: 1): Author: Frank W3LPL <donovanf@starpower.net>; Date: Wed, 26 Jun 2024 01:12:47 -0400 (EDT); Hi Jim, I replaced my 4 foot fluorescents in about a dozen fixtures with LEDs with excellent success. I stripped all of the original electrical guts out of the fixtures, it was a trivial effort and l; /archives//html/RFI/2024-06/msg00057.html (7,972 bytes)

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