ZALYTRON Brand Tube Corporation - 3V4 Vacuum Tube - New Old Stock | eBay
3V4 Power Amplifier Pentode Tube. Designed for use in the power output stage of compact, battery operated equipment. MFR: RCA, Zenith, Sylvania, Raytheon. SKU: 3V4. New old stock. No longer available for
3V4 Pentode. A miniature radio tube by Purotron, Switzerland #21003 | M-Ware