"Editorial Coverage Of OP-27/37 Ultra-Low Noise Precision Op Amps," Precision Monolithics, June, 1981.
It turns out that the OP-27 and its dual the OP270 still make a decent phono preamp.
This document is over 35 years old and may be of historic interest.
"Editorial Coverage Of OP-27/37 Ultra-Low Noise Precision Op Amps," Precision Monolithics, June, 1981: https://www.proaudiodesignforum.com/ima ... e_1981.pdf
"Editorial Coverage Of OP-27/37 Ultra-Low Noise Precision Op Amps," Precision Monolithics, June, 1981.
Editorial Coverage of OP-27/37 Ultra-Low Noise Op Amps
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