General purpose amplifier at low and high frequencies MFR: GE, Tung Sol , Sylvania, Amperex, Motorola, Raytheon SKU: 6661 New old stock * No longer available for export.
Designed to operate in high voltage circuits. These tubes are used with very little cosmetic damage and low hours of operation. New old stock * No longer available for export. MFR: Chatham Electronics SKU: 4B32
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 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 as a long life passing tube in series regulated power supplies. Has a 100 Watt dissipation and capable of replacing 4 5998 tubes in most circuits. New old stock * No longer available for export. MFR: Tung Sol SKU: 7242