Jack Regan wrote: > I am moving my shack to a new location and was considering repacing my Astron > 70M (70 amps with meters)with something smaller. > > I saw some small switching supplies that seemed to do what I wanted but they > all have fans. The last thing I want is more noise in my shack. > > Anyway, is there any advantage to a switching power supply (with a fan) vs a > linear supply (with no fan) other than the size and weight? > > Jack, AE6GC
Properly designed and manufactured, switching power supplies can be more efficient ( 70-80 %) than linear power supplies (~50%). For a given load, they should use less power and run cooler. The issue to be considered is the EMI produced by the switching power supply. Some are good and others aren't. It depends on the model and the installation. As to the noise the fan makes, you might have to try it to see. There are some very quiet fans in use these days. Are you going to have a computer in the shack? If so, its fan(s) is likely to be louder than the one in the switching power supply. 73, -- Clark B. Wierda N8CBW _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
