I suspect that your Kenyon may have the same circuit as the Datamarine,
Standard Horizon and a couple others.

At least the manual (circuit diagram and schematics) I have for my old
Standard Horizon is the same as the Datamarine unit I now have.

I have scanned and posted the Standard Horizon manual on my web site and you
may download it from there. http://hood.hctc.com/~esteve/private/manuals/

I hope this will help you..

Steve
s/v Good Intentions