4606 System Building Block
Digital Equipment Corporation (DEC)
||4606F on solder side
1/2 x 7 x 4 1/2 in.
"PULSE AMPLIFIER" on solder side. Portion of one land pattern has peeled up off PCB. Two indecipherable script letters written in orange crayon on both solder side and component side: possibly "ry".
Component: circuit board / module