[Drake] Drake 2B schematic level

[windy10605 at juno.com]

I found out on Collins units that it's important to have the right
(latest level) schematic because generally it includes the best fixes for
minor problems and now I regularly see "....but what level manual do you
have ?". In looking at the Drake 2B schematic, it says 531626290 (5/31/62
?)in the lower right corner and several parts are in bold print ...C8 at
470pf, R4 at 2.2Meg, R11 at 68K, R66 at 68 ohms, etc. these are clearly
changes made at some time. 

I know there are several Drake 2B units out there. What is the latest
level Drake 2B schematic out there ?

73 Kees K5BCQ