fogg Posted November 7, 2006 Share Posted November 7, 2006 Anyone know what the voltage of the fans should be in the SR606? one of the fans in my amps has stopped, just took it out and by the looks of things they have been replaced before. The rating on the fan is 115V is this corret? I would of thought they would of been 250 volt fans? Anyone got any idea what they should be? Thanks Simon Link to comment Share on other sites More sharing options...
Rob_Beech Posted November 7, 2006 Share Posted November 7, 2006 If the fans are run in series then you would expect 115V (or there abouts) fans. Although one would expect them both to fail together. so maybe this is not the case. Rob Link to comment Share on other sites More sharing options...
fogg Posted November 7, 2006 Author Share Posted November 7, 2006 Just tested output to the fan and its definately 115volts. It does seem strange but nevermind new fan ordered from RS now on its way! Link to comment Share on other sites More sharing options...
Brian Posted November 7, 2006 Share Posted November 7, 2006 On some amps, fitted with two fans, they are 110v fans wired across each 110v section of the transformer primary. This is so you don't have to change fans when you change mains voltage. For 240v operation they are in series, for 110v they are parallelled. Link to comment Share on other sites More sharing options...
lee.basham Posted June 21, 2007 Share Posted June 21, 2007 Just tested output to the fan and its definately 115volts. It does seem strange but nevermind new fan ordered from RS now on its way! For the record the fans in the SR range are 115V and were originally Etri fans,the fans are wired from the secondary of the transformer through the thermal switch circuit. the thermal has a 1uF 400V cap across it to allow the fan to run slowly when the amp was cold but would be shorted out to allow the fan to run at full speed once it had reached around 55 degrees. If you use any other 115V fan in this amp it is probable that it wont start at the slow speed (although it will run when the thermal switches) this is not a problem if you use the amp at low levels but if you use it at high power levels it is probably best to put a shorting link across each capacitor on the thermals to ensure the fans run full all the time. DON'T put a short across the thermals without caps as this will prevent the unit from protecting under fault conditions or at switch off. thanksLee Basham Link to comment Share on other sites More sharing options...
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