The power amplifier section also makes use of 2P29L tubes, which have similar characteristics as far as power draw is concerned. Normally, vacuum tubes rely on a resistive heater to eject ...

The pentode is controlled with the pre-amplified signal and acts as a power amplifier. [Marcel]’s amplifier also uses a PY88 tube rectifier instead of semiconductor diodes, making it an entirely ...

tubes, two ultralinear output transformers and one power transformer. Unlike its previous amplifiers, the Dynaco ST-70 was a ...

Wrapped in a thick-walled aluminium chassis that registers 23kg on the scales, the SU-R1000 must surely be an old-school beast of a Class A/B amplifier. Nope. Not by a long shot. We get our first ...