DL#074 - Grass Instruments Model 78 1970s Polygraph & EEG Teardown Part 1 @DextersTechLab

DL#074 - Grass Instruments Model 78 1970s Polygraph & EEG Teardown Part 1 @DextersTechLab

Uploaded November 2015 | Updated September 2026, 3 days ago

Over the next week or so i will be stripping these Grass Instruments Polygraph machines and taking a peek inside while i do it.

DL#074 - Grass Instruments Model 78 1970s Polygraph & EEG Teardown Part 1

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DL#074 - Grass Instruments Model 78 1970s Polygraph & EEG Teardown Part 1