BSR 300T (circa 1970)

Documentation on the BSR 300T is thin. The one substantial period source that survives is a test report in High Fidelity (March 1970, p.46). It treated the 300T as an automatic record changer, the kind with a long spindle that stacks up to six records of the same size and speed and plays them in automatic sequence. The reviewer noted that in stack mode the overarm had to be moved to the center to help hold the records in place. He judged all operating modes simple and foolproof.

The same review reported:

Flutter: 0.15% average, judged completely inaudible
Rumble: –47 dB (CBS-ARLL method)
Tonearm resonance: 7 dB rise at 22 Hz

Beyond that review, almost nothing is recorded. There is no price, no cartridge or motor detail, and no catalog history. The March 1970 review date is the only firm timeline evidence for when the 300T was on the market.