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Re: [RFI] Oscilloscope requirements for power line noise locating

To: rfi@contesting.com
Subject: Re: [RFI] Oscilloscope requirements for power line noise locating
From: Cortland Richmond <ka5s@earthlink.net>
Reply-to: ka5s@earthlink.net
Date: Sun, 30 Dec 2012 12:35:56 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>

Even an audio scope is good enough if you first rectify the RF to recover the envelope. I presume that's what they were talking about WRT the Sadelco (etc.) FS meter. These old CB meters' sensitivity increases with frequency (until the sampling baod nears resonance, anyway) but you can use a toroidal style meter to get a pretty level response.

For DIY directional couplers, check out (for example)


On 12/29/2012 1610, N1BUG wrote:
I have some more questions. I have been re-reading relevant sections of Loftness' book on using an oscilloscope with a Sadelco (or similar, presumably) field strength meter but it isn't all coming together for me.

For this purpose, what are the minimum scope specifications for acceptable performance (bandwidth and otherwise)? The two scopes referenced in the book appear to be 40 and 60 MHz units. I don't see why that bandwidth would be needed. Is it? ...
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