S.) and high power RF transmitters, as a display device in television sets and in microwave ovens.

Vacuum tubes, or thermionic valves, are arrangements of electrodes in a vacuum within an insulating, temperature-resistant envelope.

This one has that high power twin tone like Keith's.

With settings at 5-6 its tone is rich and sweet like a hi-fi tube... Speakers are recent Jensens, but the originals are boxed up and included, and will be shipped separately. Early '60s, JMI (Jennings Musical Industries) production, small student combo, 4 watts from a single EL84, ECC83/EF86 preamp, EZ80 tube rectifier, black vinyl, lovely brown Vox grille cloth, hinged handle, has added footswitch jack...

When hot, the filament releases electrons into the vacuum: a process called thermionic emission.

by Frank Stroupe ***WARNING-There are voltages inside of a tube guitar amp that can KILL you.

In excellent condition with the original footswitch, loaded with the original Jensen C15N, dating to the 36th week of 1963. Here we have a 1964 Fender Bandmaster head and matching 2x12" cabinet.

Pre-CBS, Fender Electric Instruments, about 40 watts from two 6L6s, great tremolo.

Although the envelope was classically glass, power tubes often use ceramic and metal.

The electrodes are attached to leads which pass through the envelope via an air tight seal.

They do have PCBs (Printed Curcuit Boards), as opposed to the original's "hand-wired" circuitry, but the components (capacitors and resistors) are the same values as amps from that period.

Here we have a vintage 1951 Fender TV-front tweed Deluxe amplifier, an early piece of Fender history.

The Fender '65 Twin Reverb Amp is an authentic all-tube reproduction of the original classic!