Pick-Up

This type of pick-up is used by the Cliftophone Company as well as the B.T.H., the former fitting their well-known parallel action tonearm, and the latter a tubular telescopic tonearm.

The cobalt steel permanent magnet is of generous cross-section, and the pole pieces are arranged to give differential variations of the magnetic field which are converted to electrical energy in the pick-up coil surrounding the armature. The armature is of small dimensions, which would lead one to expect good reproduction of high frequencies.

This surmise is confirmed by the test, and the output at 4,000 cycles is practically the same as. at 250 cycles. The movement is lightly damped, and record wear is very low. In every respect a first-class job.

Here you find 40 models, 35 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from BTH (B.T.H.), British Thomson-Houston Co, Ltd.