This old taster circuit, found in 1970s American documentation, is for operatives and comparators of the time. However it can be adapted for modern circuits. Note the round socket used in the amplifiers of the time.
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This old taster circuit, found in 1970s American documentation, is for operatives and comparators of the time. However it can be adapted for modern circuits. Note the round socket used in the amplifiers of the time.
