[ntsc525]

Hi, everyone:

While looking for something else (and waiting on a shield and new ring for my 71B discussed above), I stumbled on this little tidbit on Page 187 (185 in the PDF), of the Gernsback Radio Service Manual Volume 4:
\
-----
Models 71 and 22L
Refer to Service Bulletins 128-128A

Below run No. 3 on 71-125B, run No. 2 on both 71-125 and 71-225; tone control (39) part number 05153 was changed to part number 04787. A part number 3903AH condenser was connected from plate of I output tube type (42) to ground on chassis.

The tube shield used on detector amplifier tube was changed to new shield part number 8005.

Condenser (49) part number 3793-H was changed to part number 3793-R.

-----
(I don't remember where I downloaded the Gernsback books, but they were free on line somewhere.)


This refers to the different tone control I found in mine, plus the extra tone capacitor off the plate of the output tube, but more curiously, it refers to a Bulletin 128A, that I have not found anywhere, which probably contains the updated schematic of the 71 Code 125 with shadow meter.

I hope someone in this Phorum can find and scan Bulletin 128A for those of us who may run across a Code 125 71 like mine.

Dan