Vacuum Tube - 6J5, Triode, Medium-MU
New-Old-Stock (NOS) tube.
Also known by US military identifier VT-94D.
The 6J5 is a general-purpose triode designed for use as a detector, amplifier, or oscillator. Features of the 6J5 include a relatively high transconductance and a medium amplification factor. It is well suited to resistance-coupled service, having high output voltage capabilities.