Special Cable For The 10811 B; Special Parts Replacement Considerations - HP 10811A Operating & Service Manual

d. Approximately 6-feet of 24-gauge wire.
e. Labels for banana plugs.
8-64. To construct the connector:
a. Solder the center pin of the BNC connector to pin 1(A) of the printed circuit connector; this is
the 10MHz output signal.
b. Bend the BNC ground lug to align with pin 2(B) of the printed circuit connector.
c. Solder one end of a 2-foot length of wire to pin 2(B) of the printed circuit connector.
Also solder the BNC ground lug to pin 2(B). This is the oscillator circuit common.
d. Solder one end of a 2-foot length of wire to pin 3(C) of the printed circuit connector.
This is the oscillator (+) supply.
e. Connect a jumper wire between pins 5(E) and 6(F). This terminates the HC input.
f. Solder one end of a 2-foot length of wire to pin 11(M). This is oven monitor output.
g. Solder one end of a 2-foot length of wire to pin 14(R) of the printed circuit connector.
This is the oven (+) supply.
h. Solder one end of two 2-foot lengths of wire to pin 15(S) of the printed circuit connector.
This is the oven common.
i. Twist together one of the two wires connected to pin 15(S) and the wire connected to pin
14(R). These are the oven controller power supply inputs.
j. Twist together the remaining wire connected to 15(S) and the wire connected to pin 11(M).
This is the oven monitor output.
k. Twist together the two wires connected to pins 2(B) and 3(C). These are the oscillator supply
input.
l. Connect one banana plug to the free end of each wire.
m. Label each banana plug as follows:
Wire connected to:
pin 2(B)
pin 3(C)
pin 11 (M)
pin 14(R)
pin 15(S) two wire
n. Inspect the connector for poor solder joints, bent or damaged pins. Double check the labeling
of the banana plugs to be sure the polarity markings are correct. If the voltages are
connected the wrong way, damage to the 10811A may occur.

8-65. SPECIAL CABLE FOR THE 10811 B.

8-66. A micon to BNC adaptor cable is available for the 10MHz output signal. Order HP Part Number
05060-6116 (see

8-67. SPECIAL PARTS REPLACEMENT CONSIDERATIONS

8-68. Several mechanical parts and components must be replaced as a pair or require special
consideration. They are:
a. Oven mass assembly and thermistor: If the thermistor (RT1) is found to be defective, the
thermistor and oven mass assembly must be replaced as one item, HP Part Number 10811-
60106. Do not attempt to replace the thermistor alone.
oscillator supply (-)
oscillator supply (+)
oven monitor (+)
oven supply (+)
oven supply (-)
Figure 8-13).
Label as:
oven monitor (-)
Model 10811A/B
53