The MESA® 5U4G Rectifier Tube is a classic 1930s "Coke Bottle" design. It produces a flexible, elastic and spongy feel that is a bit more controlled and slightly less "saggy" than our newer 5U4GB
PLEASE NOTE:This older 5U4G is no longer the current production tube used in new MESA amps featuring this tube type and due to its tall "Coke Bottle" design, this tube may not fit in all amplifiers (4"+ from bottom of base to top of glass). Please confirm the height between your amp’s chassis and the top of your cabinet before choosing this tube. All current MESA amps using this tube type ship with the newer, compact, shorter profile 5U4GB – Please visit the 5U4GB page for more details on that tube.
MESA Rectifier Tubes are premium grade and offer unsurpassed consistency and reliability for ANY tube amplifier, and certainly MESA amplifiers!