At 59 years old, he finally put together his own stereo tube amplifier and we have to admit ... The output stage consists of two Edcor audio transformers (one for each channel) that converts ...

A conventional tube amplifier has a circuit whose fundamentals ... as [Mike Freda shows us with a stereo amplifier in the video below the break. The tubes in question are the 12AU7 double triode ...

The Dynaco ST-70 was the company’s first stereo amplifier. It utilized four EL34 output tubes, one GZ34/5AR4 rectifier tube, two 7199 input (driver) tubes, two ultralinear output transformers ...