looks Apples and Oranges, but Primes have an A/C distribution box in the back that the big round A/C plug goes into... this whole box removes from the chassis, and when disassembled, reveals a fuse inside along with something that looks like an EMI filter. The fuse is replaceable without soldering... ...but this is a Prime, not a PDP-11/44, but I'd look for something similar... -dq