DEC RK05 Emergency Retract Batteries

dwight dkelvey at
Wed Mar 16 13:38:21 CDT 2016

I'd think a stack of supper capacitors would do it.

From: cctalk <cctalk-bounces at> on behalf of Paul Koning <paulkoning at>
Sent: Wednesday, March 16, 2016 10:32 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: DEC RK05 Emergency Retract Batteries

> On Mar 16, 2016, at 1:24 PM, Jos Dreesen <jos.dreesen at> wrote:
> ...
> Additionally the NiCd never keep charge, if , like me, the drives  are only fired up once a year...
> I am thinking of just adding some wiring to an external battery.

I wonder if it might make sense to replace it by a capacitor.  For this kind of application, the total capacity is not an issue at all, but only the available current for a fraction of a second.  By that measure, it doesn't take all that large a capacitor to do as well as a battery; the difference is that the battery can sustain that current far longer -- which doesn't matter here.


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