Looking for VAX6000 items (Paul Koning)

Michael Thompson michael.99.thompson at gmail.com
Thu Jul 15 15:19:10 CDT 2021

> From: Paul Koning <paulkoning at comcast.net>
> To: Chris Zach <cz at alembic.crystel.com>, "cctalk at classiccmp.org"
>         <cctalk at classiccmp.org>
> Subject: Re: Looking for VAX6000 items
> A number of the large disk drives use 3 phase motors; RP04/5/6 are
> examples as well.
> Three phase motors won't run on single phase power without help from run
> capacitors.  (There is no such thing as "two phase power" -- 220 volts is
> single phase, balanced.)
>         paul

The RP06 uses 220VAC single phase motors for the spindle and blower.

I converted an RP06 from three-phase to single-phase to use with PDP-10
KS10 at home. Instructions are here:

Michael Thompson

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