Preamplifier relais control with CMOS logic

The circuit describes a complete Preamplifier relais control.

It provides for 6 Inputs of which 2 may be Tape-Ins, and one delayed Output.

Moreover there are 2 Tape loops for two-way recording and read after write.

Further more there´s a switch-on for a headphone amplifier and a mute-function.

Fig 1
Fig 1
Fig 2
Fig 2

 

 

 

 

Under Construction

 

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