This timer, like the previous circuits, uses a currently uncommon integrated circuit. The time is given by capacitor C1 and R2 which has the range of values indicated in the diagram.
This is the typical circuit of a fraction watt amplifier for a small record player or portable 70's...
This circuit, which can act as a shield, is from old documentation, using a DAC of the time. Next to...
The Micro-Lock line of Molex connectors can be obtained from Mouser Electronics. These connectors...