Designed to function in both AC and DC powered receivers. MFR: Raytheon, Zytron, Philco, Hytron SKU: 7B4 New old stock * No longer available for export.
Miniature space-charge-grid tetrode intended for use as a driver for the transistor power-output stage of automobile radio receivers. MFR: Raytheon, RCA, Zenith, CBS SKU: 12K5 New old stock * No longer available for export.