Vacuum Tubes

Know Your Amp Bias

Know Your Bias

1:53 pm
Different Types of Amp Bias Just like the idle of your car may need adjusting when a major change is done to the engine, new power tubes need their idle (the “bias”) adjusted to make…
Atm-Sphere M-60 Amp

What it Takes to Make a Tube Amp

2:52 pm
Atma-Sphere is world renown for fantastic their OTL amplifiers.  In this video they use stop-motion animation to provide us with a look into how the award-winning Atma-Sphere M-60 power tube amp is hand assembled.  If…

Vacuum Tubes: A Brief History

5:00 pm
Vacuum tubes, amplifier tubes, or thermionic valves, are the heart of guitar amplification. Even solid state amps are usually designed to emulate the sound of tube amps. But the vacuum tube was actually critical for…