Peter,
?Not sure if the T4XC is the same it has a 4-wafer switch the T4XB is a 3-wafer switch.? Unfortunately not only is the contact gone, but the wiper has a big chunk missing as well
I think it's done for.
I have a friend that's going to a ham swap this weekend he's also going to look for a junker T4XB so hopefully between everyone, I can get this thing fixed.
Dave
W6MQI