6BW4
The 6BW4 is a dual-diode tube where both diodes share a common cathode. The 6BW4 has a 6.3-volt heater. There is also a 12BW4, which is the same but with a 12.6-volt heater.
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6BW4 in 126 schematic.
The 6BW4 is a dual-diode tube where both diodes share a common cathode. The 6BW4 has a 6.3-volt heater. There is also a 12BW4, which is the same but with a 12.6-volt heater.
6BW4 in 126 schematic.