B

The Tektronix Type B is a plug-in for 500-series scopes.

It is identical to Type A, with the addition of a 10x-gain AC amplifier which can be switched in to extend the vertical sensitivity from 50mV/div to 5mV/div.

Like the Type A, the Type B has its roots in the 1954 introduction of the 531 and 535, as Type 53B, with 10x-AC bandwidth of 2Hz to 9MHz. In 1956 it was replaced by the Type 53/54B with DC-20MHz or 2Hz-12MHz bandwidth in the 541 and 545. In 1959 the Type 53/54B was renamed Type B.

• http://bama.edebris.com/manuals/tek/b/
• http://w140.com/tek_fcp/tek_type_b_factory_cal_proc.pdf