I never hear the fan on my KXPA-100 - Ha! Of course it doesn't have one but works fine for up to 110w with my KX3 or K3/10. Made several 6m-SSB contacts with 80w for the ARRL VHF Contest this weekend. 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubususa at gmail.com