[volt-nuts] Power Designs Precision Power Supplies

Marvin E. Gozum marvin.gozum at jefferson.edu
Wed Apr 25 13:21:30 UTC 2012

Thanks a bunch, Alan.  Yes, I got them fairly cheap too, shipping 
was >= cost given its weight.  But, its built like a tank and should 
outlive me, at the least.  I have the same precision models, the 
2020B and 5020, which by spec have few peers even today [ the 
equivalent HP then was the 6114A series and for DC output is close to 
the 6626A as posted by Poul] and cost << 1/3rd of the HP on eBay [ 
and easier to service if needed.]

In case others are curious, the load and line regulation is 10ppm for 
CC or CV, and ripple is < 100uVpp.  In my tests of as-is units [ 
without servicing the rotary dials or the pots], these are at least 
its specs at maximum output, 20V, 2A or 50V, 1A.

At 10:20 PM 4/23/2012, Alan Hochhalter wrote:
>I got a couple of mine for less than $20 each which was certainly a 
>factor, but I think I paid as much or more than the sales price for 
>shipping on all of mine.  The 2005A isn't too heavy, but the others 
>have some real iron in those transformers!
>Some of the things I liked about them were meters on all outputs 
>switchable between V and A.  Not volt-nuts accuracy, but it is nice 
>to be able to get a good idea what is going on without having to 
>hook up a meter.  All of them have current limiting and the triple 
>output supplies have over-voltage protection as well.  My TP340s 
>have two of the outputs that can be switch-selected to track which I 
>thought might be handy for projects that need +/- supplies.
>On 4/23/2012 3:55 AM, Marvin E. Gozum wrote:
>>Hi Alan,
>>Thanks a ton for those insights, what made you decide to get these 
>>instead of the known players like HP, Agilent, Kikusui, Kenwood, 
>>Sorensen etc.,?


Marv Gozum
Philadelphia, PA 

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