Folks, I got the Lysco 600 working OK. I was also fortunate in that
whomever had it for these intervening years treated it well. But, on
the the NC-183D. A previous owner elected to install a product detector
in a typical plug-in can and is inserted into the NBFM adaptor socket.
The receiver-phone switch was borrowed for the selection of the new
detector and the old and new detectors, or so it would appear. Although
it works, I'd like to get it back to stock. If it the switch was the
only issue, it'd be easy but there are other obvious changes. Does
anyone have any info or pointers to where this, or similar,
modification(s) may have been written up? I'm going to proceed and
trace out as best as possible but I'm always wary of removing some
critical wire, someplace, that may cause a loss of operation, in the
process. I'll of course document any reverse actions so I can follow the
breadcrumbs back, if necessary. But... if someone has the key....

73 de Jeep/K3HVG