NOTICE: Be sure to enter the Make & Model of component you are purchasing tubes for. Failure to do so will delay processing of your order. This does not imply that we confirm compatibility. Consult the manufacturer and owner's manual before ordering.
Attention! Before buying any 5AR4, 5U4, GZ33, or GZ37, here is a hot ticket from Uncle Kevvy: Buy the Philips 5R4GYS made in Holland. Click here for info. Very rare. We got a stash of them, so right now they sell at an abnormally low price and will head up to $100 each at some point. They are incredible. The only thing you have to do it make sure that sure you have enough height clearance... we provide you a picture illustrating the height of them so there's no surprises.
Now, on to the Mullard GZ33. In military boxes, produced circa 1967. This looks just like a GZ37, but is considered a superior tube. Can also be used as a GZ34 in some applications, consult with your equipment's manufacturer before use. Draws a smidge more current than a GZ34 but everybody seems to feel it’s no problem. It's slim and graceful "ST" shaped bottle make it one of the most gorgeous rectifier tubes available. Very limited stocks.