On Thu, 5 Mar 2020 17:08:01 -0800 (PST), wrote:

The white tube is a variable carbon resistor. Increasing pressure on the end lowers the resistance. It oughta be progressive. And shouldn't smoke

This.

It's a stack of carbon disks. The resistance changes with pressure.

Can't remeber if non-destructive disassembly is possible. If so I'd try a
reshuffle of the disks.


Thomas Prufer