sponding sockets and receive the wear rather than the permanent
socket. When worn so that satisfactory contact can no longer be
made, the test adapters can be replaced without disconnecting
the leads from their respective test socket.
15. Preliminary Starting Procedure
a. C h e c k t h e v o l t a g e a n d f r e q u e n c y o f t h e a l t e r n a t i n g c u r r e n t
( a c ) power source to be used for the operation of Test Set, Elec-
tron Tube TV-2(*)/U. The voltage must be between 103.5 and
1 2 6 . 5 volts ac and the frequency between 50 and 1,000 cycles per
second (cps).
C u t i o n : Never connect the TV-2(*)/U to a direct current (dc)
power source.
b. R e l e a s e t h e l a t c h e s a n d r a i s e t h e c o v e r o f t h e t u b e t e s t e r .
c. R e m o v e t h e p o w e r c o r d p l u g f r o m t h e d u m m y p o w e r c o r d