Broken shaft on a Motorola TS-4

[Dave Tilotta]

Originally Posted by Eric H

As I recall the tuner knob on the models without fine tuning are identical to the other knobs but with a dot or mark to indicate position. I have one somewhere, I'll take a pic if I find it.

Found it. To think, someone back in 1948 must have had the job of poking a soldering iron in these knobs to make the dot.

Thanks. Is it ribbed for a split shaft?

Also, my volume and contrast knobs don't have concentric circles like yours does. Are mine not original? I appended a photo of mine at the bottom of this reply.

Originally Posted by Electronic M

I believe that is correct for the early production chassis. The early ones have some of the 6KV caps mounted above chassis, channel 1 and no fine tuning.
Later chassis usually have a smaller center shaft for fine-tuning that rotates a single capacitor plate on the back of the channel water switch.

Yes, two of the 6KV caps are mounted above the chassis -- they're 0.03 mfd which surprised me. My set also has channel 1 and no fine tuning.