4CX350F/8322 Amperex JAN Transmitting Tube Tetrode (Pull)
These tubes have 26.5 volt filament requirements. Nice replacement for a 4CX250B, but you will have to change filament transformer from 6.3 volts to one with 26.5 volt.
For Broadcast / Industrial use. Removed from working equipment, tested. Used * No longer available for export MFR: Amperex/Jan Made in USA