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Old 7th Apr 2021, 11:14 am   #4
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 3,189
Default Re: Grundig A 7400 (CUC220)

You should not use coin cells as they will explode when charged. Rechargeable coin cells will be overcharged so no good either. Or is there a diode in the replacement module? In that case, your only problem will be periodical battery replacement.

I think there's only paper capacitors in the mains filter. Those blue ones should indeed be replaced before they blow, even though they're slightly more reliable than their Rifa cousins.
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