This symmetrical four voltage source was found in a 1968 Motorola documentation. The circuit is of a type that was commonly used in that time amplifiers.
This audio configuration of televisions from the 1960s was found in a Mullard transistor reference...
I found this circuit in a doc umentation from the year 1968. It uses germanium transistor and has...
This circuit amplifies and pre-selects signals that must be received by a VHF receiver. The coils...