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21. [RFI] John Ogden TV RFI (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Wed, 6 Dec 2000 00:02:35 -0500; Was the buzz worse before you put the toroid on the power cord? If so another should help. Maybe a larger one on the speaker leads. Make sure it is near the audio amplifier; the speaker itself will n; /archives//html/RFI/2000-12/msg00005.html (6,732 bytes)
22. [RFI] ISUZU 1999 Rodeo (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Wed, 6 Dec 2000 20:30:30 -0500; RF must be triggering the automatic door lock controller. Follow the wiring back to the IC and put ferrite beads over the wiring near the controller. I assume an IC controller. Your suggestion of bon; /archives//html/RFI/2000-12/msg00009.html (7,016 bytes)
23. [RFI] Antenna distance (Gerry KA2MGE) (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Fri, 22 Dec 2000 20:25:34 -0500; FCC has no rule stating antenna distance. They do have RF exposure rules. To check your setup the easy way go to http://n5xu.ae.utexas.edu/cgi-bin/rfsafety.cgi -- Jack, K6NY, Palomar Engineers -- FAQ; /archives//html/RFI/2000-12/msg00019.html (6,795 bytes)
24. [RFI] AM Station Overload - N5KM (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Wed, 27 Dec 2000 16:12:13 -0500; I'd put a trap across the antenna line tuned to the AM station. This is a series coil and capacitor, one variable so you can tune it. It will be very sharp and cut out the AM without affecting your 8; /archives//html/RFI/2000-12/msg00045.html (7,114 bytes)
25. [RFI] TVI Michael Brown (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Tue, 31 Oct 2000 22:08:56 -0500; Radiation from the antenna appears to be the problem since moving the antenna away helps. It may be picked up by the house power wiring and brought to the TV that way. Try ferrites on the line cord.; /archives//html/RFI/2000-10/msg00002.html (6,851 bytes)
26. [RFI] Truck Stereo WA3GIN (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Sat, 14 Oct 2000 18:48:52 -0400; I'd put ferrite beads on the coax right at the feedpoint. Also on any control cables. Also on woofer cable where it emerges from amplifier & at woofer itself if it has active elements. -- Jack, K6NY,; /archives//html/RFI/2000-10/msg00010.html (6,632 bytes)
27. [RFI] David Rich CATV Sound Only (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Tue, 31 Oct 2000 00:42:21 -0500; I would first suspect the 115v power line and put ferrite split beads over the TV power cord or wrap on a big toroid. Also may be needed on converter/VCR power cords. And, yes, a choke on the CATV ca; /archives//html/RFI/2000-10/msg00023.html (6,740 bytes)
28. [RFI] NuTone Intercom System (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Fri, 15 Sep 2000 00:26:11 -0400; We recommend ferrite split beads to fix this problem. Get 1/2" hole split beads and put one or more over the bundle of cables coming into the main amplifier. These cables pick up RF and bring it to t; /archives//html/RFI/2000-09/msg00001.html (7,132 bytes)
29. [RFI] Remote PC speakers (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Mon, 18 Sep 2000 00:38:53 -0400; We suggest using F114-43 ferrite toroids. Put one where speaker cable enters the computer. Another where the DC power from the wall-wart enters the speaker. In each case wind the wire through the tor; /archives//html/RFI/2000-09/msg00003.html (6,820 bytes)
30. [RFI] (RFI) Telephone Crosstalk (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Tue, 1 Feb 2000 17:19:26 -0500; Crosstalk is a function of the wiring, capacitive or inductive coupling between the cables. Twisted pairs are usually used to minimize it -- Jack, K6NY -- FAQ on WWW: http://www.contesting.com/rfi-fa; /archives//html/RFI/2000-02/msg00002.html (6,817 bytes)
31. [RFI] Ferrite Material (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Tue, 4 Jan 2000 00:38:20 -0500; Amidon curves show 77 material best for HF but tests we have made recently show better performance by 43 material above 7 MHz. Our tests were made with the Autek meter. I understand that Ed Hare is g; /archives//html/RFI/2000-01/msg00005.html (6,985 bytes)
32. [RFI] RFI: Corded phone RFI (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Fri, 14 Jan 2000 12:13:22 -0500; Use a ferrite toroid. Unplug the line cord from the phone. Run it throught the toroid 3 or 4 times. Plug the cord back into the phone. This usually works. Use F82-43 toroid. If not successful use a F; /archives//html/RFI/2000-01/msg00020.html (6,681 bytes)
33. [RFI] Snap-on split beads (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Thu, 2 Dec 1999 01:05:35 -0500; Here at Palomar we measured different ferrites for impedance using the Autek RF-1 meter. The results favor 43 material over 77 material for the HF bands. Here are some results at 7-MHz: One turn on R; /archives//html/RFI/1999-12/msg00007.html (7,343 bytes)
34. [RFI] Ferrite Materials (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Mon, 6 Dec 1999 23:13:29 -0500; Palomar and Amidon both sell materials from Fair-Rite. Fair-Rite's catalog has curves showing 77 to be better than 43 up to 30 MHz. However, here at Palomar we ran tests showing that 43 is better tha; /archives//html/RFI/1999-12/msg00030.html (7,305 bytes)
35. [RFI] blowing out phones (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Sun, 19 Dec 1999 16:59:39 -0500; I can't imagine enough signal picked up on telephone wiring to "blow out" a phone. I prefer to think that it is her imagination or that of a salesman selling her a new phone. -- If your coax runs clo; /archives//html/RFI/1999-12/msg00034.html (7,209 bytes)
36. [RFI] What frequency to suppress (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Sun, 10 Oct 1999 13:18:51 -0400; To W5XL -- Even though the fundamental 15 KHz is causing all the harmonics those harmonics are real. To eliminate them use toroids that are effective at the harmonic frequencies. Suppressing the 15 K; /archives//html/RFI/1999-10/msg00011.html (7,130 bytes)
37. [RFI] RFI and the TS-850 (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Wed, 14 Jul 1999 13:19:38 -0400; What kind of antenna? 80 and 20 meter rotary beam? -- Balun will not stop RF pickup if coax does not come away at right angles to antenna. And may not stop pickup on rotor cable. Use beads over this; /archives//html/RFI/1999-07/msg00007.html (7,315 bytes)
38. [RFI] 6 meter RFI/TVI (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Wed, 12 May 1999 17:31:11 -0400; For the telephone we recommend use of ferrite toroids right at the phone. Unplug the modular plug and wind the cable about 3 times through a F82-43 toroid, then plug back in. This can work when a fil; /archives//html/RFI/1999-05/msg00019.html (6,962 bytes)
39. [RFI] Michael D Elliott (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Sat, 6 Feb 1999 18:45:54 -0500; Good grounding is desireable but usually does not cure RFI problems. Most common is pickup of the signal from your antenna on power & telephone wiring and on low signal level leads. Easiest cure is u; /archives//html/RFI/1999-02/msg00001.html (6,850 bytes)
40. [RFI] Interference in the Power Supply (score: 1): Author: Palomar Engineers <Palomar@compuserve.com> (Palomar Engineers); Date: Tue, 23 Feb 1999 23:33:04 -0500; Probably your house AC power wiring is picking up your 80 meter signal and feeding it into the Astron. Or RF is getting in through the DC wiring to the ICOM. Wrap either or both of these cables aroun; /archives//html/RFI/1999-02/msg00004.html (6,590 bytes)

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