I understand that Harbach's replacement fan for the SB-220 has usefully more air flow. Is it much noisier than the stock fan? 73, Pete N4ZR No, no ... that's WEST Virginia -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com