A few notes on this. They must have built some,
but maybe they went to a select few & probably got called
back in after testing ala Chrysler turbine cars. Being in the line
folder they probably intended to release them but didnt for
an unknown reason. Bose sets were limited distribution at
first & probably the digital process chassis also, I cant remember.
Another thing that I noticed back then the parts for both the
digi set & projo were listed in the book way before we knew
about them. Wonder if 40bc50 only parts were listed ??
Varactor tuner: C-line intro
In the TM it dont look like a SGVG tuner. A small box with pots
that look a lot like the newer ones in a turret. Bandswitch cams
that work one bandswitch. Plasic part on front probably mounts
from front not back as the norm. On rear some gears & the
usual SC twist for stop or off setup. Motor hangs underneath.
Tuning meter & bandlamps shown off board in schematic.
Tuners were modern with FET RF amps on both U & V.
I worked at a Big Zenith dealer from 1970 on and never saw one
& we covered several very high end towns. C line SS set were
not common, most we sold & serviced were E line, lots of them
& they were plain fun to work on. (not so much the vert chassis)
73 Zeno
