The 105.2 Active Circuit Diagram shown here was sent by Raymond Cooke
to someone in 1984 along with the 'redacted' letter. The recipient
noticed some corrections required for the drawing and sorted these
out with KEF. This then prompted the note from Michelle.

The paper drawing is now in a poor, fragile condition and is thus
hard to scan. It is also much larger than A4 size. The owner sent us
four part-scans sections which here have been used to generate a
combined version for the sake of convenience. The owner also did
a re-drawing of the active circuit diagram which is also provided
here.