--- On Mon 08/08, Tony Duell < ard at p850ug1.demon.co.uk > wrote: From: Tony Duell [mailto: ard at p850ug1.demon.co.uk] To: cctalk at classiccmp.org Date: Mon, 8 Aug 2005 22:30:27 +0100 (BST) Subject: Diablo 30 power Joe, (I think) was asking about power for the Diablo Model 30 disk drive <br>(DEC RK02/RK03).<br><br>I had a chance to look in the manuals on bitsavers today. The Model 30 <br>Maintenance Manual (not the parts list), gives the pinout of the power <br>connector. I'd forgotten one detail, there are 2 connections for each of <br>the +15V and =15V lines, one for the high-current, noisy, stuff (like <br>motors), one for the low currnet, sensitive, stuff like the read <br>amplifier. You should use separate wires for each connection and only <br>join them at the PSU output terminals.<br><br>There's also a maximum length of power cable, something like 5'. I don't <br>see why this would be a major problem in any sane system layout.<br><br>Oh yes, these drives take up to 8A (!) on the +/-15V lines.<br><br>The PSU manual _is_ on bitsavers, I think. It's the Model 29 manual in <br>the samre directory. No, this is not obvious, I was just looking at <br>various manuals. The DEC PSU is, I think, electrcially different, though.<br><br>-tony<br><br> ----------------------- The power supply I have for my two RK8s (RK03s) is made by Pertec and is called the model 9000. Depending on how many drives it can be a 9001, 9003, or 9004. It shows +5, +12, -26, +24. The 9004 adds -24v. I hope this information is helpful to someone. Tim R _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!