Category: Hickok

Hickok 752A mutual conductance tube tester, reliable and accurate with a large analog meter. Fully restored and calibrated.

Hickok 539C tube tester upgraded with digital meters for improved readability while retaining original mutual conductance circuitry. Fully restored and calibrated.

Hickok 6000A tube tester with good cosmetic condition. Fully restored and calibrated for reliable tube testing.

Hickok 750 mutual conductance tube tester, known for accuracy and durability. Fully restored and calibrated with good cosmetics.