This is the traditional audio preamp configuration with the National Semiconductor LM382. The circuit has good gain and can be used with magnetic pickups or from signals from an auxiliary input.
We found this circuit in Japanese documentation from the 1960s. Transistors are types of the time...
Many collectors of records, tapes and even audiophiles often keep recordings on tapes that...
This lockable two-position servo control system was found in documentation from the 1990s. The...