Now that Dishtronix has effectively buried the Ten Tec name 6 feet under with their repair shop shutting down, I have a TT 238C L network tuner to repair. The electronics and main parts are fine. However, on the 11 position fixed capacitor switch, and the antenna switch, Ten Tec designed their own in house switch position locking mechanism on the 238C. It's not the usual ball and slot type lock. This one only controls the shaft position in the front of the tuner. The ceramic / switching part is at the other end of the shaft. There is a cog like switch lock / coupler with a spring loaded arm and a small roller on the end of the arm that moves up and over the tip of the cog and settles into the groove as you switch. Well, the locking shaft of the cogs is wearing big flat wear spots in the bottom grooves and it's getting hard to switch. Partly my fault fore not lubing the cogs, but also I believe too much spring tension is on the roller, mashing the metal flat, and or the wrong strength of materials were used.
Anyway, are there any small machine shops in the Amateur world that could "Copy" 2 of these cogs if I send them in? If I can't get replacement cogs, I will talk to Palstar about modifying the inside front plate, removing the old mechanism and finding a typical ball and socket rotary assembly, although this could be hard. If anyone needs a visual picture, I'm sure a google search could find it. Constructive replies are appreciated as always.
Todd - KT0DD