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Author Topic: Teardown: 1979 vintage temperature controller  (Read 3009 times)

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Offline ResRTopic starter

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Teardown: 1979 vintage temperature controller
« on: June 28, 2013, 03:31:07 pm »
Temperature controller PTR-P from 1979 (34 years old) used to control the temperature in a pig farm using various ventilators and air valves (by the look of the cabling, most parts was missing). Of course for the time period, there is no paint on a pcb, no silkscreen, but the traces are hand drawn and tin plated.
« Last Edit: June 28, 2013, 03:45:32 pm by ResR »
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Offline SeanB

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Re: Teardown: 1979 vintage temperature controller
« Reply #1 on: June 28, 2013, 06:36:07 pm »
Just lovely transistor spacers and those electrolytics are incredible.
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