104

The Tektronix 104 Square Wave Generator and Voltage Calibrator was introduced in 1948. The 104A was introduced in 1950.

Tektronix 104
Square wave generator / voltage calibrator Tek 104A Produced from 1948 to (?) Manuals Tektronix 104 Manual (PDF) Tektronix 104A Manual (PDF) Tektronix 104A Schematic (PDF) Tektronix 104 History Parts List (PDF, needs OCR) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The high-frequency square wave output of the 104 is specified to have a 15 nanosecond rise time. The 104A has a slightly looser specification of 20 nanoseconds.

Pictures

104A
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104A Schematic