Found in an old English publication, this circuit applies to the 240 V network, but can be changed to lower voltages. Transistors are mostly general-purpose, admitting modern equivalents.
This preamplifier is recommended by Sanyo and is based on its LA3160 integrated circuit. The...
This very low current negative bias source can be used in any inverter. The output voltage is...
This non-inverting AC amplifier was found in the February 1990 issue of Radio Electronics...