Icom IC-706 MKII Instruction Manual page 56

10 OPTIONAL INSTALLATIONS/SETTINGS
Mi CR-502 HIGH-STABILITY CRYSTAL UNIT
By installing the CR-502, the total frequency stability
of the transceiver will be improved.
@ Remove the bottom cover as shown on the oppo-
site page. .
@ Cut the leads of R153 and L35 (in a shielded box)
on the PLL unit.
@ Put the CR-502 in the space available as shown in
the diagram, then solder its feet into place (6
points).
@ Adjust the reference frequency using a frequency
counter.
© Return the shield case and bottom cover to their
original positions.
MIF filters
Several IF filters are available for the IC-706MKIl.
Choose a filter most appropriate to your operating
needs.
Note: After filter installation, specify the installed filter
using initial set mode (item 19). Otherwise, the
installed filter will not function properly.
500 Hz/-6 dB
- 250 Hz/-6 dB
2.8 kHz/—6 dB
1.9 kHz/-6 dB
350 Hz/—-6 dB
FL-100 cw NARROW FILTER
FL-101 CW NARROW FILTER
FL-103 SSB WIDE FILTER
FL-223 SSB NARROW FILTER
FL-232 CW/RTTY NARROW FILTER
CR-502 frequency stability: +0.5 ppm
(-30°C to +60°C;
—22°F to +140°F)
R60 ae freq.
check point (60.00 MHz)
@ Remove the top cover as shown on the previous
page.
@ install the desired filter as shown in the diagram
below.
e These filters can be installed in either direction.
@ Replace the top cover.
Filter