Quote:
Originally Posted by DavGoodlin
I show off the TMA feature often - 2 chassis with tuner standing on end now in my shop. I learned about it from my first employer who refused to work on any SS consoles in the late 70s. . IIRC There was a similar provision made for XL-100 and even later "jiggable" RCA chassis.
Im pretty sure Zenith has a pair of screws like that on the 66 and later models,
But yeah - like Zenith needed it. RCA had to do something if they weren't planning on putting in a $ervice $aver access panel on bottom of the cabinet 
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Zenith had a TMA that unplugged so it was easy to transport the chassis.
RCA, the TMA was hard wired and they made it easier to transport the chassis for service. Even the earlier B/W sets that had a separately tuner assembly had holes in the in the chassis for hanging the tuner.
The PITA was lining up the indicator wheel that was driven with the tooth belt.