The 6X4 Rectifier

The 6X4. Not all rectifiers were large tubes. Here we have an assortment of 6X4 tubes. These are very good sounding tubes, with the white labeled Tung Sol being my favorite. I’ve seen these used mostly in preamps and other equipment, but occasionally you’ll find an amplifier running this rectifier. Spec sheets for the 6X4 can be found here: here.