TB 9-6625-2157-24
NOTE
The tuning slugs have a double threaded adjustment. The first
section turns a short way before picking up the next section
and works in the same manner in both in and out adjusting.
NOTE
On some models the 65-120 range has no tuning slug.
Adjustment is accomplished by changing coil spacing.
Compressing the coil lowers frequency. Spreading coil raises
frequency.
9. Pulse Rate
a. Performance Check
(1) Position controls as listed in (a) through (e) below:
Function switch to + VIDEO PULSE.
(a)
RF OR PULSE LEVEL control fully cw.
(b)
PULSE WIDTH switch to 1-10.
(c)
PULSE RATE switch to 50-500.
(d)
WIDTH ADJ control fully cw.
(e)
(2) Turn RATE ADJ control fully ccw. If frequency counter does not indicate 50 Hz
or less, perform b below.
(3) Set PULSE RATE switch to 500-5KC and RATE ADJ control fully cw. If
frequency counter does not indicate 5 kHz or more, perform b below.
b. Adjustments. Adjust R203 (fig. 1 or 2) for 5 kHz indication on frequency counter (R).
C221
R203
Figure 2. Pulse generator assembly - adjustment locations.