THE MULLARD B9A ENVELOPE MAKING MACHINE
Posted by STEVE M on
Today's delve into the Mullard Blackburn archive reveals that with the advent of the P series TV valves and their popularity that a means of increasing production and reducing lead time was required. This was achieved by the introduction of a new B9A envelope making machine that was sourced from Philips Herleen. The photo below shows this delightfully complex rotary machine below: -
And here is an X ray pictogram of a finished PCF80, the envelope from which was blown on this very machine.
