Special version of the 12AY7. Made with three pieces of mica, halo getter, and black anode plates. Tested at 55 on TV 7. Minimum value is 32. This tube was made by GE and has the same construction as the JG GE. New old stock * No longer available for export. MFR: IBM SKU: 6072-IBM
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