[HomeBrew] FW: Circuit for a 30 amp AC current meter?

[Ray, W4BYG]

I will add the reason for my approach of using the CT/related circuitry, is
I would like to monitor the AC current remotely.
Ray, W4BYG

-----Original Message-----
From: homebrew-bounces at mailman.qth.net
[mailto:homebrew-bounces at mailman.qth.net] On Behalf Of Ray, W4BYG
Sent: Monday, February 17, 2014 12:05 PM
To: homebrew at mailman.qth.net
Subject: [HomeBrew] Circuit for a 30 amp AC current meter?

** Please do NOT cross-post messages when posting to HOMEBREW **

I have a project for which I have some of the main components, but do not
yet have a good circuit in which to utilize them.  

I would like to make a 30 amp AC current meter for my portable generator.  I
have a 30 amp current sample (CT) which produces .333 VAC at 30 amps.  It is
said to be quite linear.  I also have an analog DC 100 milliamp meter (I
have other values too),  which I would like to display the resulting
currents on.  I can make a new calibrated face for the meter.  

It seems I need a full wave "precision rectifier" circuit using opamps to
overcome the non-linearity of diodes in low voltage areas, but I have not
come across a circuit which will do this and also drive the 100 ma DC meter.


Did a rather extensive web search, but did not find a circuit I felt was
applicable.  Maybe my lack of experience on the subject kept me from seeing
such.

Anyone have any experience, suggestions or alternatives along these lines?

Your attention is appreciated.
73,

Ray, W4BYG

Ineptocracy (in-ep-toc-ra-cy) - a system of government where the least
capable to lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers

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