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TMC Passive Voice Control unit

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Author Topic: TMC Passive Voice Control unit  (Read 160 times)
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Patrick J. / KD5OEI
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« on: January 04, 2020, 08:52:17 PM »

Came across this TMC manual - Model PVC-1 / PVC-2. It uses a bucking winding in a dual transformer setup with apparently standard audio transformers, and a thermistor for a level detection and control element which acts upon the incoming audio power. The thermistor is not well identified, I am guessing that the less massive it is, the faster the unit reacts.

The manual is attached. It seems pretty interesting and very simple.

* TMC PVC.png (16.8 KB, 941x298 - viewed 49 times.)
* tm_pvc-2_20_59.pdf (2804.38 KB - downloaded 24 times.)

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