188.8.131.52.5 Connect the negative terminal of the second milliammeter to
184.108.40.206.6 Connect the other end of the second resistance to terminal
220.127.116.11.7 Apply the 6,3 ac power source (18.104.22.168.2) to terminals E
and F. Center tap to terminal P.
22.214.171.124.8 Apply one of the 100-volt ac power sources (126.96.36.199.3) to
terminals B and C.
188.8.131.52.9 Apply the other 100-volt ac power source (184.108.40.206.3) to
terminals A and D.
NOTE: Terminals A and B shall have correc-
sponding polarities, as shall terminals C
220.127.116.11.10 Apply power (18.104.22.168.1) to terminals L and P (L being
To test for balance currents as specified
22.214.171.124 Balance currents.
126.96.36.199.1 Apply a signal source (188.8.131.52.5) to terminals H and K.
184.108.40.206.2 Adjust this signal, both in magnitude and polarity, until the
output currents from pins R and S are balanced at 6.5 plus or minus 1.5 ma.
Amplifier gain. To test for amplifier gain as specified in
220.127.116.11.1 Adjust the magnitude of the signal voltage (18.104.22.168.5) for
a change of 0.1 volt from the balanced condition (22.214.171.124.2).
126.96.36.199.2 The output current from one terminal (R or S) shall show an
increase to 13 plus 1 ma minus 1.5 ma, and the output current from the
other terminal (R or S) shall show a decrease to 3 ma maximum, as speci-
fied in 3.3.4.
188.8.131.52.3 Adjust the signal source (184.108.40.206.5) to give a 1 plus 0.1
volt signal with polarity at terminal H the same as at terminals A and B;
and the polarity of terminal K the same as at terminals C and D, as per
3.3.2. The output current from terminal R shall read 13 plus 1 ma minus
1.5 ma, and the output current from terminal S shall read 3 ma maximum.
Readjust the signal as specified in 220.127.116.11.2.