IBM 4331 Mainframe 3 phase converter

Curious Marc curiousmarc3 at
Thu May 4 01:26:27 CDT 2017


Thanks, that looks just about perfect. Solid state, true sinusoid 3 phase, 30A continuous but can do 140A for 4 seconds - seems made to power a big bunch of vacuum column tapes.



From: cctalk <cctalk-bounces at> on behalf of "cctalk at" <cctalk at>
Reply-To: Bob Rosenbloom <bobalan at>, "cctalk at" <cctalk at>
Date: Wednesday, May 3, 2017 at 10:04 PM
To: "cctalk at" <cctalk at>
Subject: Re: IBM 4331 Mainframe 3 phase converter


I use a solid state one, an older version of this:


Bought on ebay quite a few years ago.


I also have a small Phoenix rotary phase converter, also from ebay. This 

one seems to have unbalanced outputs.

I believe it is for motor loads only.








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