Quote:
Originally Posted by Electronic M
+1
In 1971 some of the consoles got a duramodule with a dip IC. And in 72 some of the consoles with the round IC that plugged into a standard tube socket switched from that to a chassis socketed DIP IC (that's the only difference I noticed between the 20BC50 and 20CC50 chassis). It seemed in the hybrid era Zenith fielded more different color chassis both console and portable than they did before and each was slightly different how it was a hybrid....My guess is that Zenith was afraid that they'd get a bad batch of parts, or someone would make a bad circuit and that if they didn't have that technological variety their whole brand would suffer instead of only a small portion of their line.
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Zenith chassii evolution is interesting to me. They are almost all the same.
Best example is 4 tube hybrid, flat chassis then CC2's. All the same sets
with many of the same parts & service problems. Just changes in the
sweep for the most part. If you can fix a CC2 you can for the most
part do them all.
The 14 & 16" were more built to size & not quite the same sets.
You cant squeeze a flat chassis into a 14" set !! In later yrs they did
get a CC2 into a 13" set complete with a massive power transformer
( 13GC10 ) And did it again getting the XXX A.K.A. System 3 style
chassis a 13 ". And both retained easy serviceability.
enuf fer now !
Zeno