Quote:
Originally Posted by old_coot88
The 12BF6 is the oddball in the lineup. Wonder what its function is  being it's a dual-diode/triode, and the 12AV6 is also a dual-diode triode. |
According to the tube lineup, the radio in question has a separate osc and mixer stage. The osc. is the 12BF6 and the mixer is a 12AU6, the rest of the circuit is the typical AA5 type. You only needed a low mu triode for the osc function.