DL#079 - Grass Instruments Polygraph Mechanical Timer Teardown @DextersTechLab

DL#079 - Grass Instruments Polygraph Mechanical Timer Teardown @DextersTechLab

Uploaded December 2015 | Updated September 2026, 1 hour ago

In this video i teardown a simple mechanical timer that was attached to one of the Grass Instruments Polygraph chart recorders.

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DL#079 - Grass Instruments Polygraph Mechanical Timer Teardown

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DL#079 - Grass Instruments Polygraph Mechanical Timer Teardown