CADR Smoke Test!

While working on the SDU program, I've also been cleaning and preparing the CADR for a power-up attempt. There's no means of removing the processor from the CADR, so the first power up was going to be an all-or-northing sort of thing - No checking the backplanes absent of cards first, because there aren't any! I did remove everything except the bus interface from the IO busses though, which does me little good since there's only one CADR processor and if it's toast, it's toast.


Disk Drive Disappointment

Up until now everything has been going better than expected, which means it's well beyond time for something to blow up in my face. This would of course be the disk drives. As they were mounted lowest in the racks (except for the PDUs) they had the lowest prospects of survival. It was also expected that even if the drives themselves had survived, their non-removable filters would be contaminated with mold and they would destroy the HDAs when spun up. That said, it's best to try and know than forever wonder, so I set about getting the drives out for inspection.


CADR cleaning

It's just about time to finish cleaning up the CADR. The shop-vac was taking huge flakes of rust off the vent at the bottom of the rack, but eventually stuff stopped falling out.

Bottom of the CADR

It's still pretty rusty but at least there's less floating around.


Mighty-Mite power-up!

The Mighty-Mite is the CADR's power supply. A similar supply was used in the KS10, but with a different configuration. This one outputs 10 amps of 12V and a whopping 162 amps (total) of 5V; 150 amps on one connection and 12 amps on another. Here's the business end:

Business end of the Mighty-Mite


Unwrapping the CADR, Part 2

I worked my way around the bottom of the machine, cutting the wrapping in small increments to limit the spillage onto the floor and vacuuming out all the loose rust and dirt as I went. Some of it had worked its way between the layers of the plastic wrapping and had to be cleaned out from there as well. This is the bottom rear of the rack, where the Chaosnet transceiver was.