203-0130-90
The Tektronix 203-0130-90 (M130) is a Tek-made preamplifier integrated circuit. It was designed by Jim Woo.
The chip contains one channel with gain switch, gain calibration, positioning, trigger pick-off, and channel switch.
Two chips are combined on a ceramic substrate with heatsink and printed resistors to form the 155-0155-00 (H332).