Details
New old stock octal full wave rectifier with tubular T12 bulb. Various brands. The 5U4GB is uprated over the 5U4G.
NSN/FSN = 5960005011947, 5960005081047, 5960005093056, 5960006150245, 5960006154739, 5960006428341, 5960007124025, 5960008177100, 5960008293367
HP/Agilent Number = 1930-0008