Even if you aren’t a tube aficionado, you can’t help but be mesmerized by the blue glow inside a mercury vapor rectifier when it operates. It looks less like early 20th century tech and more like ...

Converting ac to dc has been accomplished by several different types of rectifiers through the years. Here are a few of the more common types of rectifiers used in the past 100 years. Mercury arc ...

Solid-state tube replacements are innovative devices that can act as a substitute for traditional tubes in your guitar amplifier. Unlike their fragile tube counterparts, these replacements utilize ...

John Dunn recalls a close call with at at-home vacuum tube experiment and shudders at the thought of using another particular ...

Single-ended tube with a brass admedium base insulated skirt and two glass insulators, a contact post extending from the skirt and around the bulb to the top. Tipless P-shaped envelope. 2 amp rating.

WHEN an alternating current arc is established in a vacuum tube between a mercury and an iron or graphite electrode, the current only passes during half the time, namely, when the mercury pool is the ...

Single-ended tube with a brass admedium base insulated skirt and two glass insulators. Tipless T-shaped envelope. 1 amp rating. Donor’s card reads: “Tungar rectifier bulb made by the General Electric ...