PIPN1 DATA: FREQ,THRE(VOLTS)
     26666.7         .248832    
     21333.3        7.607280E-02
     17066.7        2.547670E-02
     13653.3        1.345890E-02
     10922.7        9.346470E-03
     8738.13        8.532122E-03
     6990.50        1.023860E-02
     5592.40        1.228630E-02
     4473.92        2.123070E-02
     3579.13        5.282853E-02
     2863.31         .109545    
     2290.65         .131454    
     1832.52         .131454    
     1466.01         .131454    
     1172.81         .157745    
     938.248         .144001    
     750.599         .358320    
     600.479         .358320    
     480.383         .565228    
     384.306         1.17205    
     307.445         1.68776