[R-390] sp-600-jx-17 - bucking transformer - How to....

[Rodney Bunt]

 You can use a "bucking transformer...
 
 o-------------|
                \
                / 10v winding "Bucking Winding"
                \
                /
               |
 Input voltage |---------------o Outupt is 110v
   120v        |
                \
                /
                \ 110v winding "Mains winding"
                /
                \
                /
 o-------------|---------------o Output is 110v
 
 To calculate the Output Voltage
 
 Output = Input Voltage*("Bucking Winding" Volts+"Mains Winding" Volts)/"Mains Winding" Volts
 
 PS: make sure the Bucking Winding has a current capability equal to, or greater than, that which
 is drawn by the Output Load.
 
 A lot cheaper than a Variac...
 
 Rodney
 VK2KTZ

 > Or with a variac set to 110 volts and using the 117 or 130 volt tap? I think
 > I have a variac on the way and I plan to use it on both R-390As and the SP.
 > 
 > 
 > 
 > Barry
 > 
 > _______________________________________________
 > R-390 mailing list
 > R-390@mailman.qth.net
 > http://mailman.qth.net/mailman/listinfo/r-390


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