02-19-2026, 09:17 PM
Now I have an apparent typo in the 1941 service yearbook.
The biggest of the three bias resistors, 82B on the diagram, is measuring about 156 ohms. The problem is, the circuit diagram says it's supposed to be 150, which is acceptable, while the parts list says it's 115, which means it needs replacing. It gets all the more complicated since the part number (33-115336) turns up in other manuals as a 1/2 watt 150 ohm, but a 2010 thread here seemed to conclude that 150 ohm, 2W was the right value so I'll assume the parts list is just wrong for now.
The biggest of the three bias resistors, 82B on the diagram, is measuring about 156 ohms. The problem is, the circuit diagram says it's supposed to be 150, which is acceptable, while the parts list says it's 115, which means it needs replacing. It gets all the more complicated since the part number (33-115336) turns up in other manuals as a 1/2 watt 150 ohm, but a 2010 thread here seemed to conclude that 150 ohm, 2W was the right value so I'll assume the parts list is just wrong for now.
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