AF3 Miniwatt used/good 1940”s

AF3 Miniwatt used/good 1940”s slight rattle inside base, dried glue particles

Pentode

Fil.: 4V @ 650ma

Iplate=8ma

Vplate max=250V

The AF3 is a variable-mu RF pentode. Operation under AGC control would have been in RF or IF amplifier service in superhet receivers.