Diablo 30 power

Joe, (I think) was asking about power for the Diablo Model 30 disk drive (DEC RK02/RK03). I had a chance to look in the manuals on bitsavers today. The Model 30 Maintenance Manual (not the parts list), gives the pinout of the power connector. I'd forgotten one detail, there are 2 connections for each of the +15V and =15V lines, one for the high-current, noisy, stuff (like motors), one for the low currnet, sensitive, stuff like the read amplifier. You should use separate wires for each connection and only join them at the PSU output terminals. There's also a maximum length of power cable, something like 5'. I don't see why this would be a major problem in any sane system layout. Oh yes, these drives take up to 8A (!) on the +/-15V lines. The PSU manual _is_ on bitsavers, I think. It's the Model 29 manual in the samre directory. No, this is not obvious, I was just looking at various manuals. The DEC PSU is, I think, electrcially different, though. -tony