3B1
The Tektronix 3B1 is a timebase plug-in introduced in 1962 for 560-series scopes. The calibrated sweep rates go from 1 sec/div to 500 nsec/div. There is a switch that enables 5X horizontal magnification, which makes the fastest sweep 100 nsec/div. The 3B1 has a delayed sweep and a regular sweep. The 3B1 uses vacuum tubes, bipolar junction transistors, and tunnel diodes.
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In 1965 Catalog
