Designed to function in situations with high peak plate current at negative grid potentials. New old stock * No longer available for export. MFR: Tung Sol SKU: 6098
Designed to be used in automobile headlight dimming service as the tube is very sensitive to light, allowing the tube to increase or decrease resistance in the circuit. New old stock * No longer available for export. MFR: RCA SKU: 6328
Designed to act as a voltage regulator New old stock * No longer available for export. MFR: Amperex (Made in Holland), Heinz and Kaufman (Made in Germany) SKU: 6354
Intended for operation as a pulse rated grounded grid oscillator at frequencies as high as 5000 megacycles. New old stock * No longer available for export. MFR: GE SKU:6442
Designed to function as a voltage regulator. Keeps the voltage around 150v and amperage between 5-25 MA New old stock * No longer available for export. MFR: Tung Sol, Raytheon SKU: 6542
Designed for grounded grid oscillator, amplifier and frequency multiplier service. New old stock * No longer available for export. MFR: National Electronics SKU: 6761