[R-390] Callsign past

[Dan Merz]

Hi,  I'm trying to i.d. the builder of a homebrew receiver that I have.
Based on the paper notes,  schematics that accompanied the set,  I believe
his first name is John and his callsign was WN1DQX.  The receiver was built
in 1964.  I have only a callbook from 1991.  Does anyone have a callbook
from around the 1964 period?  Or maybe there's some other database available
for old callsigns?  Dan.