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.