6AB4EC92triode High-mu triode (Pinout same as 6C4 except for pin 5 not having a connection)
6AB8ECL80triode triode plus output pentode primarily designed for use in television receivers (VHF 405 line models) with the triode as a frame blocking oscillator and the pentode as a frame output valve.
6AC7pentode1852 Television Sharp Cutoff R.F. Pentode. (Often encountered in a black metal envelope, not to be confused with the 6CA7.)
6AG76AK7pentodeThe 6AG7 is an American metal valve designed for single ended audio output stages. Probably for receiver use.
The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 66 mm tall.
6AH6pentodeThe 6AH6 is a miniature sharp-cutoff pentode. Its high transconductance and low input and output capacitance adapt it to use as a wide-band amplifier
6AJ8ECH81triode -heptodeThe 6AJ8 triode heptode was designed for the role of frequency changer (mixer) in superhet receivers, the two valves share a common cathode.
6AK5EF95pentodeMiniature V.H.F. Sharp cut-off Pentode (Used in old “Radiosonde” weather balloon transmitters, receiver front ends and contemporary audio equipment) B7G, (Miniature 7 pin) base
6AK6pentodePower pentode. 7-pin miniature version of type 6G6-G. Unusual low-power consumption output tube with 150 ma heater.
6AL3EY88rectifier Television “Damper/ Efficiency” Diode
6AL5EAA91diodeDual Diode, Detector. Often used in vacuum tube volt meters (VTVMs). Miniature version of type 6H6.
6AM4triode UHF triode is designed for grounded grid operation to ensure the maximum isolation between input and output circuits.
6AN5 SYLpentodeMiniature bulb pentode, equivalent to 6AG7. First tube designed for low cathode interface resistance, intended for RF, video and/or computer
6AN8triode – pentodetriode is well suited for use in low frequency oscillator, sync clipper, sync separator and phase splitter
6AQ4EC91triode miniature single triode for use as a grounded grid amplifier, and thus at high frequency. This type of valve was designed for RF applications
6AQ5EL90pentodeBeam-power pentode, 7-pin miniature similar of type 6V6.
6AQ8ECC85double triodeDual Triode with internal shield
6AS5pentodeminiature beam pentode vacuum tube designed primarily for use in the audio-frequency output stage of automobile and other low-voltage audio amplifiers. It is known for its good linearity and low distortion, making it a popular choice for audiophiles looking to improve the sound quality of their audio systems.
6AS6pentodePentode with fine-pitch suppressor grid which could serve as a second control grid. Used in radar phantastron circuits.
6AS76080double triodeDual low-mu Triode, Low Impedance
6AT6EBC90double triodeDual Diode, High Mu Triode, miniature version of type 6Q7. Triode amplification factor: 70.
6AU5pentode 10 W beam power pentode vacuum tube with an octal base.
6AU6EF94pentodeSharp-cutoff pentode
6AU8triode – pentodegeneral purpose triode pentode for use in 600 mA heater chain television receivers. In Europe the standard was 300 mA heater chains
6AV6 TROEBC91double diode – triodeDual Diode, High Mu Triode, miniature version of type 75. Triode amplification factor: 100. (Triode section similar in characteristics to one half of a 12AX7.)
6AW8triode – pentodetriode-pentode combo vacuum tube with a B9A (Noval) miniature 9-pin base.
6AX6 Gtriode – pentodeHigh-vacuum Rectifier, Octal (Int.Octal, IO) K8A, USA 1935
6AZ5 SYLDouble Diode, Subminiatur-8, with space 1/8.