If the below is true, and it really is a bother, a series
resistor can be installed to reduce the speed of the
fan to the original Heath RPM. Then the "noise" will be
the same as before the mod.
Subject: [AMPS] Harbach SB-220 Fan Noise
> 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
FAQ on WWW: http://www.contesting.com/FAQ/amps
Administrative requests: amps-REQUEST@contesting.com