ICOM HF/VHF/UHF ALL MODE TRANSCEIVER User Manual

60

10

OPTIONAL INSTALLATIONS/SETTINGS

■

By installing the CR-282, the total frequency stability
of the transceiver will be improved.

➀

Remove the bottom cover as shown on the oppo-
site page.

➁

Remove the 5 screws and 2 flat cables holding the
PLL unit in place.

➂

Remove the existing crystal unit.

➃

Put the CR-282 in the space available as shown in
the diagram.

➄

Adjust the reference frequency at L601 (also R602
and L623 if necessary) using a frequency counter
(60.00000 MHz).

➅

Return the shield case and bottom cover to their
original positions.

CR-282 frequency stability: ±0.5 ppm

(–30°C to +60°C;

–22°F to +140°F)

■

Several IF filters are available for the IC-706MKIIG.
Choose a filter most appropriate to your operating
needs.

Note: After filter installation, specify the installed filter
using initial set mode (items 9, 10). Otherwise, the
installed filter will not function properly.

FL-100 

CW NARROW FILTER

500 Hz/–6 dB

FL-101 

CW NARROW FILTER

250 Hz/–6 dB

FL-103 

SSB WIDE FILTER

2.8 kHz/–6 dB

FL-223 

SSB NARROW FILTER

1.9 kHz/–6 dB

FL-232 

CW/RTTY NARROW FILTER

350 Hz/–6 dB

➀

Remove the top cover as shown on the previous
page.

➁

Install the desired filter as shown in the diagram
below.

• These filters can be installed in either direction.

➂

Replace the top cover.

Filter

CR-282

ribbon
cable

ribbon
cable

L601

Reference freq. c
(60.00000 MHz)

existing 
crystal

PLL unit (bottom)