Andy Taylor wrote about converting a 78 rpm phono turntable to 3-speed
operation and installing a new cartridge.  I expect that the original
cartridge was a crystal cartridge and the new one is ceramic or
magnetic.  I will look around and see if I have an old cartridge that
will do the job.  Lacking that, just about any old amp-preamp will
boost the output enough to restore the original volume level.  Just
hide it in the back of the cabinet with the speed control.

Craig Smith