The 6U9 was specifically designed for use in television receivers. The semi remote-cutoff pentode section was designed for use as a gain-controlled video I.F. amplifier and the medium-mu triode section, for a range of applications within the receiver. 6.3 V indirectly heated cathode. MFR: GE, Lindel, Amperex, Admiral SKU: 6U9 New old stock * No longer available for export.