This circuit is from Mullard documentation from 1969. Transistors support current equivalents. Output transistors must be mounted on heat sinks.
This preamplifier is recommended by Sanyo and is based on its LA3160 integrated circuit. The...
This reinforcing stages from a 1960s documentation. No information is given about the transformer...
This circuit can use any comparator or even an operational amplifier. We can use the LM339 and the...