Re: WANTED old PDP-11?

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Article #1193

#1193

From: Bill Pechter
Date: Wed, 26 Aug 1992 13:19

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In article <1992Aug26.095459.1@cc.curtin.edu.au> zrepachol@cc.curtin.edu.au (Paul Repacholi) writes:
>> 
>> All RP drives are 3 phase, as is the RM05. All others are single I'm reasonably
>
>The CDC 9766 is 3 Phase. In all disks I have seen, the motors are 3 phase, star
>or delta conected, depending on local voltage ect, and the electronics are
>conected from one phase to neutral. 

Sorry, the CDC9766 is a two phase drive.  Two hots only.  The motor
on the RP04 was the only one I know that was three phase.

I watched one spin backwards and bang the brushes against the outer wall
at NJ Bell during an 11/70 reinstallation during my DEC Field Circus
days.

The RP05/6 and RM series used two phases and you could balance load
out quite easily by switching them in the plugs.

Bill

-- 
--------------------------------------------------------------------------------
        Bill Pechter, N2RDI           | The postman always pings twice.
        Concurrent Computer Corp.     | pechter@ocpt.ccur.com
        2 Crescent Place, Oceanport, NJ 07757 - Tel:908-870-4780

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References: <1992Aug24.212459.17668@mnemosyne.cs.du.edu> <1992Aug26.064807.1@cc.curtin.edu.au> <1992Aug26.095459.1@cc.curtin.edu.au>

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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!sdd.hp.com!think.com!ocpt!pechter
From: pechter@ocpt.ccur.com (Bill Pechter)
Newsgroups: comp.sys.dec
Subject: Re: WANTED old PDP-11?
Message-ID: <1600@ocpt.ccur.com>
Date: 26 Aug 92 13:19:03 GMT
References: <1992Aug24.212459.17668@mnemosyne.cs.du.edu> <1992Aug26.064807.1@cc.curtin.edu.au> <1992Aug26.095459.1@cc.curtin.edu.au>
Organization: Concurrent Computer Corp.,Information Services
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