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Originally Posted by Eric H
This is the one you're talking about? http://cgi.ebay.com/1960s-Zenith-19-...QQcmdZViewItem
I hadn't even noticed it was listed as a 19" set.
Did Zenith just decide to designate it by viewable area rather than overall size or is this actually a smaller tube than the 21" roundie? |
That may be exactly what happened. Before an FTC ruling sometime in the 1960s, manufacturers would use the outside diagonal (diameter for a roundie) measurement of the tube envelope to designate size. The ruling forced them to switch to the viewable area. Probably not exactly Zenith's voluntary decision, but something they had to go along with.