Ring Amplifier #1, from the year 1997


 Ring Amplifier #1, from the year 1997, 2


 Ring Amplifier #1, from the year 1997, 3


 Ring Amplifier #1, from the year 1997, 4


 Ring Amplifier #1, from the year 1998, 5


 Ring Amplifier #1, from the year 1998, 6


 Ring Amplifier #1, from the year 1998, 7


 Ring Amplifier #1, from the year 1998, 8

T:  picture 1, top

Ring Amplifier


T:  picture 1, bottom

* obstructs disturbances from mains


T:  picture 2, right

TRIPLE TONE


T:  picture 3, top

Ring amplifier: a circuit that turns off a bell or triple tone from loudspeaker


T:  picture 4, bottom

* obstructs disturbances from mains





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