This fan fits the KXPA100 heatsink perfectly, is cheap, and keeps the amp stone cold even during digital modes at 100w run WFO. Almost silent--I can't hear it from two feet away.
73 Eric WD6DBM
ARCTIC F12 Silent - Ultra-Quiet 120 mm Case Fan | Silent Cooler with Standard Case | almost inaudible | Push- or Pull Configuration possible
https://www.amazon.com/dp/B0119T0D4I?ref=yo_pop_ma_swfSent from the West Coast 811A MuseumÂ
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