105

The Tektronix 105 is a 25 Hz to 1 MHz square wave generator. It is all tube. The 105 has a d'Arsonval meter on its front panel indicating the current frequency. The frequency meter works on the principle of moving a constant amount of charge per cycle, integrating this charge into a current, and measuring the current.

It was designed by Howard Vollum and Charles Sanford.

• Tektronix 105 Manual (PDF)
• Tektronix 105 Field Recalibration Procedure (PDF)

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  Block diagram

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  Power supply schematic

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  Generator schematic