I do not have a copy of the article you require but a photocopy is available from the Silicon Chip website at upon payment of a modest fee.
Considering it's a 1983 article, the circuit probably will be a linear design so fault-finding should not be at all difficult.
Edit:
I had a brainwave and decided to check the .
including all issues for 1983, are there for free download in various formats including .pdf.
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