[marv]

A few years back I did a 41-629. Part of what I did was to replace the old cell with a money changer one which has better freq response and output. The schematic for the 41-629 mentions adjusting compensator 37a to vary the lamp output. I adjusted so that when I switched back and forth between the radio and record player the volume seemed about the same. As it turned out in my case the lamp intensity is quite low. I feel this just might make my original bulb last longer.

I checked the schematic for the 41-608 and it looks like there is the same type of setup as the 41-629 except for a different compensator number. (I can't make out the number from the NA schematic). Maybe this would work for you guys too.