Few new sets and a question

[bigaudioal]

Originally Posted by David Roper

The socket is for a color wheel attachment. There's sometimes a shorting plug to allow the set to operate without the wheel attached. I say "sometimes" because if there's no plug, that most likely means there's nothing connected to the socket at all. A lot of chassis went out that way after CBS suspended (read: abandoned) its color broadcasts.

David,

You are 100% correct. The 21L1 Tele-bar chassis I jut got has NO wires attached to this socket under the chassis. So no need for the shorting plug. That's a relief! Thanks for your input.