06-18-2010, 03:56 PM
The 7B6 is the loctal equivalent of the octal 6SQ7GT. They are both twin diode hi-mu triodes.
The pin out is different also. Does it look like the socket was replaced and rewired or original?
The schematic does show the 6SQ7GT. This chassis does employ a lot of the 7 series tubes. Possible that Philco ran out of 6SQ7GT's and/or decided to use up their stock of 7B6's?
More than likely it was changed out at some point by someone who did not have a 6SQ7GT around!
The radio should work well with either.
JR
The pin out is different also. Does it look like the socket was replaced and rewired or original?
The schematic does show the 6SQ7GT. This chassis does employ a lot of the 7 series tubes. Possible that Philco ran out of 6SQ7GT's and/or decided to use up their stock of 7B6's?
More than likely it was changed out at some point by someone who did not have a 6SQ7GT around!
The radio should work well with either.
JR
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