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21. [RFI] Phonex -- remember them? -- "wireless" telephone (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Fri Mar 21 11:05:37 2003; The other day I picked up a set of Phonex "wireless" telephone jacks at a local electronics surplus house for testing. MUCH cheaper than buying the Radio Shack ones. Remembering how far I could hear; /archives//html/RFI/2003-03/msg00010.html (6,660 bytes)
22. [RFI] Terrible RFI (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Thu Mar 27 12:48:07 2003; Bob, I've found it helps to use higher frequencies. As you've discovered, elevated wires re-radiate interference, so effective direction finding can be impossible at low frequencies, leaving you to "; /archives//html/RFI/2003-03/msg00021.html (7,618 bytes)
23. [RFI] Ground Question (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Mon Feb 3 20:27:48 2003; I don't believe this is much better than a plain wire. And that is not really very good. On frequencies where the ground conductor is a quarter wavelength long, or an odd multiple of a quarter wavele; /archives//html/RFI/2003-02/msg00001.html (9,484 bytes)
24. [RFI] finding stray RF (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Sun Feb 9 14:31:40 2003; There are a number of things you can build, buy or borrow, ranging from a diode detector and earphone to a scanner with a "spectrum scope" display, to $1600 calibrated broadband field strength meter; /archives//html/RFI/2003-02/msg00022.html (7,858 bytes)
25. [RFI] Interesting Case of Interference (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Tue Jan 21 21:50:24 2003; An HTML attachment was scrubbed... URL: http://dayton.akorn.net/pipermail/rfi/attachments/20030121/f822f977/attachment.htm; /archives//html/RFI/2003-01/msg00047.html (7,606 bytes)
26. [RFI] Interesting Case of Interference (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Wed Jan 22 01:39:00 2003; An HTML attachment was scrubbed... URL: http://dayton.akorn.net/pipermail/rfi/attachments/20030121/f6a653d1/attachment.htm; /archives//html/RFI/2003-01/msg00048.html (7,601 bytes)
27. [RFI] RFI clip-on probe? (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Mon Jan 27 14:31:18 2003; You can make a tolerable clip-on probe by putting a one-turn (preferably shielded) pickup winding through a snap-on ferrite bead. You could choose a bead to not adversely affect current in the lead i; /archives//html/RFI/2003-01/msg00074.html (7,613 bytes)
28. [RFI] RFI clip-on probe? (score: 146): Author: ka5s at earthlink.net (Cortland Richmond); Date: Tue Jan 28 12:27:15 2003; Yes indeed; a ferrite bead transformer can add impedance. Typically, small snap-on EMI ferrites run about 850 permeability (e.g.: FairRite 43 or Steward 28 material) and come in at 100 MHz around 80-; /archives//html/RFI/2003-01/msg00079.html (8,072 bytes)

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