Western Electric 22A portable mixer
Incredibly pristine unit with carrying case, stenciled with original call letters, and original power supply. Complete with original Hubbell lock connectors.

Designed to parallel 4 microphones with individual volume controls into one common input circuit. Circuit composed of three stages 6J7/348A to 6J7/348A to 6F6/349A through final output transformer with 60 ohm secondary.

Often used in field as remote or site mixer with 630A or 633A dynamic microphones. Transmission via phone lines or if studio use direct 600 ohm feed to console. Can function as single channel high quality microphone preamplifier or a four line mixer.

Not an ultra-rare unit but never seen in this condition. Fully operational and with majestically historical call lettered case.
$2000