I can confirm this, see picture below taken from my 382A with SN 82906
Could measure slightly different values:
R114: 4.7kOhm+-10% according to the color code, measured 4.26kOhm in circuit. (4.40kOhm with Q106 removed)
R123: 1.3kOhm +-10% according to the color code, measured 1.29kOhm in the circuit.
I assume the board from wn1fju was previously repaired? I can see some differences at R109, Q106, C102 and C103.
My PCB looks untouched. The protective varnish is present on all solder joints.
It would be nice if someone could provide the schematic and parts list for the 382A-401 master ref module.
Or a more recent user manual for the 382A. My last one is dated November 1, 1964 and is from SN 240.
It shows updates up to SN 300 (code W) and SN 325 (code U)
Interestingly, there is an auction with SN 326 (
www.ebay.com/itm/355750647388)
It already appears to have no R8 calibration trimmer on the back. But it still has the labeling for it. So it should already have the 382A-401 inside. But maybe it was replaced later.
And there's one with SN714 (
www.ebay.com/itm/266783594476)
This one looks pretty shiny, and also has the 382A-401 in it.
Maybe someone can take a look at the 383B user manual? It might contain the same reference module, as it is very similar to the 382A.