TM 11-6625-3053-14
n. Rotate mode cam clockwise as viewed from above until the high portion of the cam just leaves the A4S1
arm. The arm will pop up and the circuit will break. The multimeter will register an open ckt.
At this precise setting, tighten the set screws on the mode cam.
o. Place the A4 tracking board in place and attach mounting hardware.
q. Replace instrument dust cover (para 6-20).
6-34.
REPLACEMENT OF POWER SET PROBE
REMOVAL
a. Remove instrument dust cover (para 6-20).
c.
Turn power set probe fully clockwise.
d. Loosen 2 4-40 hex set screws at the bottom of the drive yoke on the power set mounting block.
e. Without rotating the probe, pull it out straight.
If only the probe is being removed at this time and not the entire Klystron Oscillator, note the orientation of
the ground stub so that the replacement may be reinserted at the same orientation.
f.
Detach P2 from J2. Removal is now complete.
REPLACEMENT
a. Turn power set control fully clockwise until it can move no further.
b. Insert replacement power set probe straight into power set drive.
- at same orientation that the removed probe had if only the probe has been replaced, or
- with ground stub in vertical position if the whole Klystron Oscillator has been replaced.
c.
Gently seat probe until it butts against inner conductor. Then back off approximately .006 inches or the
thickness of a 34 AWG solid wire.
d. Lock the set screws to secure probe to drive cylinder.
e. Set up probe electrically by performing Alinement step 6 to the point where -7 dBm is obtained at P2.
f.
Reattach P2 to J2.
h. Replace instrument dust cover (para 6-20).
6-35.
REPLACEMENT OF ATTENUATOR PROBE
REMOVAL
a. Remove instrument dust cover if on (para 6-20).
6-93