Sect.IV Page 12 Model 618B
CAUTION: Do not at any time apply side motion to
the klystron; to do so will break the tube.
4) Turn klystron (6) clockwise, and at the same
time pull straight back from the cavity. Do not
attempt to rock the klystron,
5) Remove clamping ring (5).
6) Unscrew retaining nut (7) at cavity entrance
using socket wrench supplied with the instrument.
Remove the seating ring (9) and the spring (8) be-
low retaining nut. Do not use this spring or washer
again except as a necessity. New springs and
washers are supplied with replacement klystrons
ordered from Hewlett-Packard Co.
7) If the cavity ventilating pipe connector (11)
protrudes into the cavity, remove the connector
nut (9) and disengage pipe (10). Loosenset nut (12)
and back out adapter (11) until it is flush with the
inside face of the cavity bottom plate.
NOTE: See Klystron Tube Warranty Claim in
this manual.
Figure 4-7. ..istrument in Position for
Klystron Removal
4-11 KLYSTRON REPLACEMENT
4-10 KLYSTRON REMOVAL V114 Prior to installing a new klystron V114, practice
reinstalling the old one. The proper force and
To remove the klystron oscillator tube V114 from twist required to push the klystron past the spring
the resonant cavity, remove the instrument from may then be learned by practice. The procedure
the cabinet as described in paragraph 4-2. Place for installing the new klystron is as follows:
the instrument in the position shown in Figure 4-7
for ease in reaching the tube.
1) Install new ?waffle? seating ring (9) and then
new spring (8) in cavity entrance. Ends of spring
1) Remove the socket housing cap, screws and
should meet to form a complete circle.
lock washers (items 1 and 2 shown in Figure 4-8)
with the large key wrench located in the Fahnstock
storage clip on the rear chassis. Pull the housing
2) Thread the retaining nut (7) into cavity until it
(item 3, Figure 4-8) away until the tube socket
is seated very lightly against the spring. Press
is exposed.
spring into place under the nut so that it forms a
circle. Tighten the nut slightly to hold the spring
2) Pull straight back on the socket until it is free in position.
of the tube base. DO NOT apply lateral pressure
CAUTION
when removing socket.
When inserting the tube, always keep it straight
in line with the cavity. DO NOT work it from side
3) Unscrew and remove sleeve (4) which covers
to side.
--------
klystron body. |
ACEC
