Ahh the good ol days, before IP, patches, patches, patches. I think the Confidencer was the secure handset transmitter used to prevent the Russians from listening in on the old 1a2 key stuff. Hey I use to work on the 1a1 w/ the old 207c intercom wipers and cleaning carbon relays all day. 1a2 was high tech, still love that a-lead and man cave stuff. Still have the 10v lamps, #1 troubleshooting tool back then, besides a screw driver.
