I have two Astron 50 Amp supplies in parallel to run my Hercules. These
supplies are designed to run in parallel and there is a sense wire run
between the two to keep everything in balance.
Jim
-----Original Message-----
From: Dr. Gerald N. Johnson, P.E. <geraldj@ames.net>
To: zeitler@ibm.net <zeitler@ibm.net>
Cc: boatanchors@theporch.com <boatanchors@theporch.com>;
boatanchors@listserv.tempe.gov <boatanchors@listserv.tempe.gov>;
tentec@contesting.com <tentec@contesting.com>
To: <tentec@contesting.com>
Date: Thursday, July 29, 1999 10:35 PM
Subject: Re: [TenTec] paralleling several dc supplies to increase I
capability
>
>About the only way you will be able to parallel power supplies is if
>they have essentially identical regulator circuits and essentially
>identical regulator circuit gains, and truly effective current limiting.
>That leaves out Tentec and Astron supplies. Astron supplies tend to self
>destruct when operated alone, when paralleled its almost guaranteed.
>
>There is some Astron data about using a couple supplies in series for 28
>volt HF amplifiers (and 28 to 50 volts is a far more practical voltage
>for solid state KW size amplifiers than 12 because of more reasonable
>current and more reasonable collector load impedances). I think Astron
>claims they can be paralleled. I'd expect smoke when paralleling the
>same models even after making sure all the pass transistors were good in
>both supplies, and I'd almost guarantee smoke paralleling different
>models or more than two supplies.
>
>73, Jerry, K0CQ
>
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>
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