TRANSFORMERS 



159 



blocks, these coils can be connected in series, giving 14 

 turns. Applying 5 volts per turn = 70 volts to the 

 secondary (Fig. 44), we read volts across terminals (1-2) 

 = 10, (2-3) = 15, (3-4) =5, (4-5) = 15, (5-6) =25. The 

 same readings will be obtained on the other end of the 



Air Chamber Si 



Bottom Looking Up 



.8 



Air Chamber S/'o's 

 Top View 



Fig. 44. Taps 



primary winding. These readings must be checked 

 with the voltages required by the sketch. The volts 



per turn at normal potential = - = 24.2 volts. In chang- 

 ing from (1-7) to (2-8), four turns are cut out of the 

 primary winding, and the primary voltage is decreased 

 by 6300-6195 = 105 volts. Multiplying 24.2 by 4, 96.8 



