The only part left was the discharge transistor; a pentode was enlisted to stand in for that vital function, making the circuit complete. To physically implement the design, [David] built a large ...

A direct-conversion radio receiver required an audiogain of 450 from a pentode vacuum tube. A pentodehas a high transconductance—that is, the ratio of thechange in plate current to the change of the ...

If your first thought is that he must have made a flyback converter to step that voltage up to something more useful then you’re in for a surprise, because the single 6J6 pentode really does run ...

With both control and screen grids using frame-grid construction, a new pentode boasts performance ... was advancing despite the rapid growth of transistor sales. And sales of tubes were far ...

The regenerative radio was built with a pentode using 27 volts for the plate and screen voltages. Although the filament was meant for 2 volts, the two D cells (3 volts) provided longer running time, ...

What you're looking at is the Audio Research Reference 330M power amp, a fully balanced, pentode-mode monoblock ... stands for Junction Field-Effect Transistor, a semiconductor device that uses ...