[MrFixr55]

Edited at 0822 EDT to add content.

Hi Arran,

Yes, you are correct. 5U4 and 5Y3 have same pinouts, 5X4 and 5Y4 have same pinouts. I used 5X4 because it looks like that was what was in the socket. There is also a discrepancy between the pictorial and schematic in the service document. The chassis is "mirror image" because the figure in the service document is from the underside of the chassis.My detailed (labrynthian?) explanation of locating sockets was in case someone actually did make changes.

Yes, the diagram should be correct. The Service info in our library is also correct as to location of the tubes. the 2 6F6s are closer to the transformer than the 6J5 which is closer to the 1st Audio tube. This all makes sense if I were to lay out a radio. I wouldn't want to put a high impedance voltage amplifier next to a power transformer. My previous response also offered a theory as to why it actually worked with a 6F6 and 6J5 swapped.