[RFI] Clamp on RF meter

[Martin Sole]

Thanks guys,

I modelled mine on the one shown on the page Bert mentioned
http://www.ifwtech.co.uk/g3sek/clamp-on/clamp-on.htm
I'm not so much interested in absolute readings so a pot might be the way to
go for best flexibility. Thinking about what is an acceptable amount to see
on any given wire I would guess that the answer will depend on the
susceptibility of the device to which it is connected or how close the
receiving antenna is to the unwanted radiator.

I saw a comment somewhere previously that the snap on ferrite, designed for
rfi applications would be less than ideal as a core for the current sense
because it would add appreciable series inductance. In a relative sensing
application I'm not sure this matters greatly though.

Martin, HS0ZED


-----Original Message-----
From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On
Behalf Of Martin Sole
Sent: 02 February 2011 17:17
To: rfi at contesting.com
Subject: [RFI] Clamp on RF meter

I just built a clamp on RF current meter. Worky worky but I'm thinking about
relative levels and how sensitive to make it. I have to think that in a high
power ham station it might be reasonable to expect some current to flow in
various wires in and on a property but what is reasonable? Ideally thinking
that I can set mid-scale to be some sort of good/bad threshold or is it
likely to be too subjective?

 

Martin, HS0ZED

 

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