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 ...

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 ...

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.