Hey guys,
Getting ready to perform an electrical restoration on a 1935-1936 Philco Model 620B. I am really having a troubled time trying to figure out the production run number.
The tag is below. It looks like 1 - 4 but I don't really know what that means.
Thanks for the help.
Jon
That's the cabinet tag info, not the Run Number for the chassis.
Chassis production run number should be ink-stamped on top of
the chassis and is the left-hand number in the rectangle.
Could also be stamped on chassis rear apron.
Chuck
I understand Chuck. Thanks for the correction.
I have looked everywhere on the chassis and am not able to locate the ink stamp. Perhaps it has worn off over the years. A repairman has already been into the set ages ago from what I can tell.
I am just trying to figure out if this chassis is after run number 7 so I can use the correct schematic. From what I can already tell, the newer style three section wire wound resistor is in this set, so most likely it is a run number 7 or later.
Well you're in luck. Service Bulletin 218-A, for the later production runs of the 620,
beginning with Run No. 7, shows the circuit you have with the 3-section resistor
in the power supply section.
Happy Holidays!
:-)
Thanks Chuck, I have your literature for this restoration!
Jon
You have to also look at the layout of the Bake-o-lte blocks,,also,,,--it took me a time to figure that all out,,Resistor wire wound bolted to chassis has different Ohms...