24

August 24, 1949. A search coil was made
In studing the shillding
effect of metallic to filing which were coated with SnO
[?????????} by working with ver dilute
HNo3

Measured the search coil in Q-meter

C1 reasonance freq.

30 mmt 25.5 MC
6. 18.5 MC 10 [-----?] of [enanieded?] wires of 5 mm dia.

L ( C+C1 ) = 1/4 tt 2 f2
L ( C + 30 ) = 3.9 x 10-5
L ( C + 60 ) = 7.4 x 10-5

C+60 7.4 = 1.9
C+ 30 3.9 = "

C + 60 = 1.9c+ 57
0.9c= 3 C=10/3= 3.33mmf
L= 1.17 [???]