HP141T, 8552A 8552B special knob for use with 8556A LF section

Special scale for log ref level knob
with 8556A LF plug in

Special knob for use with 8556A LF plug in

Originally, with each 8556A LF section
a special knob for the IF section log ref level was provided.
HP part number 08556-00013
The knob added the red scale specifically for the 8556A.
The scale can be printed and attached to the knob flange
with double sided tape.

Print to scale and attach to the
knob flange with double sided tape.

Final product