[rogerh]

Have been unable to locate the correct schematic for this.  All the schematics I find show a 7J7 for the detector/oscillator, mine has a 6K8. The chassis is stamped  40-155, code  121 and the schematic is similar except for condenser 6 and 22 which are a different value listed that what is in this radio.  Performance seems about the same compared to the Philco 39-25 that I restored earlier.  The 40-155 uses a 1232 (7G7) for a r.f. amplifier and an additional 41 for push pull output so I really expected better sound and better reception; I even replicated the built in antenna on the 40-155.  Both of the radio's came without speakers so I installed the same type of  pm speaker in both, would the original speaker make a difference in sound quality?