Vacuum Tube - 6AU6A / EF94, Pentode, Sharp Cut-Off
New-Old-Stock (NOS) tube.
The 6AU6A is a miniature sharp cutoff pentode primarily designed for use as a high-gain radio-frequency or intermediate-frequency amplifier. Its low grid-plate capacitance and high transconductance make it especially suited for high-frequency wide-band applications.
Except for heater ratings, the 3AU6 and 12AU6 are identical to the 6AU6-A.