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[Amps] PSU not amplifier :)

Subject: [Amps] PSU not amplifier :)
From: Martin Sole <>
Date: Wed, 5 Dec 2018 18:13:18 +0700
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I have a nice big Motorola power supply battery charger unit. Comes from an MSR2000 system and can provide 13.8v at 30A. Has lots of electronics for battery charging, monitoring, alarms, etc. Would make a very nice shack supply and charger for uninterrupted 13.8v service. Type is TPN1192A and was option C28AN for the MSR2000.

My question concerns the regulation. It uses a ferroresonant design where a voltage is fed back into an auxillary winding on the transformer.

Is this something I need to be cautious of?

I notice with my fluke across the output there is a slight drop as expected when drawing about 20A but then when the load is removed the voltage seems to spike a bit up to around 14.6 volts before settling back to 13.9.

I've never used anything like this before but it does seem very useful especially if I can float charge some big gelcel batteries with it for continuous emergency use.

Martin, HS0ZED

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