BTW, the Philco factory service manuals for the Predictas have very nice diagrams with labels, so you don't need to draw your own board diagram as I did once upon a time. You occasionally see an original manual for sale on eBay. There is also a guy who sells the complete Predicta set on CD.
Another advantage of using the Philco manuals is that the little numbers on the boards match the Philco part numbers in the manuals.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html