Keyboard Assembly -
Here's a shot of the keyboard frame assembly during contact cleaning
and restoration. Like the generator, it has many compartments.
They house the multiple contacts per key and the cam that engages
release function of all 72 envelope generators. The engineering
is quite intricate and advanced for 1938. It sometimes reminds
working on my old V. W.- Porsche.
Assembling the keyboard mechanicals.
The envelope generators were in the rear section.
from the past - Jack Waters
finished the keyboard assembly on 3 /11/ 1940
The Keyboard Assembly after
restoration - I used the Altium PCB program to design
custom circuit boards for the key circuit. 12 PCB's were mounted
on top and bottom of the front component
rail. The rear component rail, as
well as the spring connector assembly were removed. 7 AMP
connectors were installed, 1 for each octave and 1 for the keyboard
power to facilitate transportation (ha ha). Note the 144 capacitors.