| 
G- 1000 TURNS ON 75% NICKEL—!IRON CORE 
H-1000 TURNS ON FERITE CORE 
| -1000 TURNS ON POWDERED IRON CORE, HIGH FREQUENCY FORMULATION 
J-l000 TURNS ON POWDERED IRON CORE, MEDIUM FREQUENCY FORMULATION 
06 K-—1000 TURNS ON POWDERED IRON CORE, LOW FREQUENCY FORMULATION 
fo) 
Ss 
INDUCTANCE IN PERCENT OF INDUCTANCE 
AT ATMOSPHERIC PRESSURE (%) 
ro) 
{e) 
96 
ie} 2000 4000 6000 000 
PRESSURE - (PSIG) 
Figure 7 
6AL5 VACUUM TUBE 
o% 
BEFORE AFTER 
PRESSURE TEST FAILURE AT 2000 PSI 
INCHES 
O | 2 3 
ee 
OCEANOLOGY SECTION 
Figure 8 
129 
