[Johnson] Invader 200

[David C. Hallam]

I am in the process of refurbishing another Invader 200 and have picked up
something on the schematic. R65, which is the screen resistor on the 12BY7A
driver, is 10K ohm.  The latest version that I have of the parts list also
lists it as a 10K resistor and on the schematic dated 1/9/61 it is shown as
a 10K.  However, on schematics dated 2/18/63 and 11/15/64 it is shown as
18K.

In the Johnson correspondence I have I can find nothing about a change of
this resistor from 10K to 18K.

Does anyone know whether this is an error that has crept into the schematic
or is it an undocumented change?

There is an error on the 11/15/64 schematic in that R25, a 47 ohm resistor
in the keying line, was left off.

David
KC2JD/4