We’re glad to announce a new item in the ReActiveMicro Store:
Replacement Filter Capacitor For Apple II Power Supply
https://www.reactivemicro.com/product/replacement-filter-capacitor-for-apple-ii-power-supply/
The Filter Capacitor is most likely to need replacing due to age or damage, and if not replaced tends to fail with lots of smoke. No part in your power supply was designed to last 30+ years, least of all this part. The good news however is it’s very unlikely any damage will occur when it fails. Here’s your chance to find a new replacement at low cost and no minimum order fees.
Filter capacitors are used for the filtering of undesirable frequencies. It protects in several ways such as suppressing harmonics of the (variable) switching frequency from exiting of the supply. More importantly it protects the supply’s diode bridge from fast transients on the line caused by switching inductive loads or lightning.
The compact film capacitor is rated 100nF (0.1uF), and up to 275VAC. Size 0.70″ wide 0.67″ tall x 0.32″ thick. Has radial leads. It’s slightly smaller than some caps used on the older power supplies, but should fit with little issue. It fits all newer power supplies perfectly.
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