Many thanks for the Sony TC-134 SD Compact Cassette Recorder schematics - should still be operating in another 50 years from now. (Worth keeping running just for the limiter in the front end - brilliant)
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I have a TC-186SD also with limiter swith and analog VU meters. Those Sonys are great machines, as it is said "built like a tank".
https://www.radiomuseum.org/r/sony_stereo_cassette_deck_tc_1.html
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