The Penta Laboratories 811A is a high mu power triode designed for service as an audio frequency amplifier or modulator, or as an RF amplifier or oscillator.
The 811A is capable of outputting up to 160 watts at frequencies up to 30 MHz.
All Penta Laboratories tubes are burned in before testing and matching at our testing facility in Ventura, California.
** No returns, however defective devices will be replaced free of charge for 13 months **
Product is manufactured by affiliated or unaffiliated manufacturers in various countries. Country of origin is printed on the tube.