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Old 11-15-2017, 09:01 PM   #7
BrucePerens
TrailManor Master
 
Join Date: Jan 2014
Posts: 893
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The old WFCO converter required the battery to be present to filter the DC wave. Some other brands were like this too. Without it, the radio would probably hum and other electronics might act oddly. The voltage regulation without the battery present might have been odd too.
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