[Milsurplus] VHF Tuner

[Glenn Little WB4UIV]

I have a VHF Tuner that cover 55-92 MHz. It has stamped on the side:
ASSY 02-620153-1
TUNING UNIT RADIO FREQ
SER NO 0032
07397
USED ON 02-820045-1
5895-121-1921

Inside it has a:
CONV, FREQ, ELECTRONIC-55-92 MHZ
ASSY 89-820219-1 07397 SER NO.0032
07397 82-820222-1
P/O 89-820215-4
SER NO 0121

Also inside is:
07397
ASSY 06-821446-1
S/N 0125
This has trimpots marked:
SWEEP LEVEL
INDICATOR GAIN
MARKER STEP
MARKER GAIN
SWEEP END POINT HIGH
SWEEP END POINT LOW

The chassis is marked:
ASSY 89-820154-1
CHASSIS ELECTRICAL EQUIP
07397
And
07397
82-820193-1

Any ideas as to what the parent equipment is and how to power it up?

Thanks
73
Glenn
WB4UIV