[Central-Electronics] 20A ???

[Paul Kraemer]

Did CE have a later version 20A with possibly a phone patch or line input on
an RCA jack on back panel?
I have one here that has an RCA jack located below the terminal strip
It is horizontally located below terminal 9
Goes to a red wire in the harness to vicinity of modulation switch
My other 20A does not have this.
The hardware used is exact same as the rest of the hardware, the wire does
not look added and the holes are clean cut (unlike many diy adds).  Also,
jack is vintage style. Any ideas?

Another question.  Anyone have a source for the front panel crystal socket
and the rear panel 120v receptacle?
Thanks and may spring be on the way!
Paul K0UYA