|
You got it wrong here: a 6AU6 is a pentode, while a 12AX7 is a dual triode.
One half of a 12AX7 would be a 6AV6, which also includes a pair of diodes.
Also, a 12AX7 has a 9-pin socket, while a 6AV6 would have a 7-pin socket.
So just pull those two tubes in front of the 6AQ5s and count the holes...
Sorry I can't help you with the stringing, there are just two many different
ways it is done. Unfortunately, the diagram is not shown for this model in
my service manual, but when you can post a clear front view of the front
of the chassis, showing the tuning shaft, the pulley on the variable
capacitor, and the pointer on the dial, maybe someone else could provide help.
Regards.
P.S.: I looked at your picture again, and those two tubes do indeed look
like 6AU6s! It is indeed possible to design a single pentode audio stage to drive
a beam power tube, but that would be somewhat different from the schematic.
Last edited by electroking; 05-15-2010 at 03:50 PM.
Reason: added note
|