Re: Power Supply Instead of HP82033A Battery Pack??? Message #2 Posted by Reinhard Hawel on 31 May 1999, 6:03 p.m., in response to message #1 by Paul S.
You should be aware of the high peak currents these devices can draw. If your source has a considerable amount of inner resistance, you could cause significant voltage drops at the battery terminals.
Especially the cassette drive with its two motors is suspectible to this behaviour. I remember, some people called the cassette drive a real accu killer because of the peak currents. This was a problem with accus 10 years ago. I replaced my accus with special accus for model cars (I believe Panasonic Hi-Amp) and had never problems after that. Additionally the capacity was somewhat higher.
I believe the printers are also a problem because of the DC-DC converter and the fast changing load conditions (all "needles" burning/none burning. This is no easy task for a power supply.
As a resume, I say you should check the ripple when loaded with changing loads. It's very probable, that the load reactions of the source can really disturb the hp devices. Also you lose a huge capacitor with the accus.
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