[462ron]

In looking at the schematic for the sg-8, I don’t see any way to adjust each band so the frequency aligns with the dial setting. I’ve never had that problem with my generator. Some bands are off slightly so I just adjust the dial for the frequency I want by watching the counter. Maybe try a new 12AU7! I’ve never used my generator to align an FM radio yet. I am only guessing here but I’m thinking you might not hear the 400Hz modulation on FM. Because the generator puts out amplitude modulation that a frequency modulation set won’t respond to. Anyway, I found the whole assembly manual for your generator here...http://tubularelectronics.com/Heath_Manual_Collection/Heath_Manuals_S/SG-8/SG-8.pdf. Might have some useful info in it for adjusting your generator!

Ron