Operation Manual
68
Installation of Optional Accessories
Optional Filters YF-122S/YF-122C/YF-122CN
1. Turn the transceiver’s power off by pressing and holding in the switch for 1/2 sec-
ond, then remove the FBA-28 Battery Case or SBR-32MH Ni-MH Battery Pack from
the transceiver. Additionally, disconnect the DC cable from the INPUT: 13.8V
jack on
the rear panel of the transceiver, when operating the FT-818 with a DC power supply.
2. Referring to Figure 1, remove the shoulder belt bracket and its two screws from both
side of the transceiver, then remove the ve screws afxing the top case of the trans-
ceiver, and remove the top case; disconnect the speaker’s connector when you remove
the top case.
3. Refer to Figure 2 for the mounting locations for the optional lters. Position the lter so
that its connectors are aligned with the mounting pins on the board, and push it into
place.
4. Replace the top case (remember to replace the internal speaker’s plug), and connect
the FBA-28 Battery Case or SBR-32MH Ni-MH Battery Pack (and/or attach the DC
power supply), and turn the transceiver on by pressing and holding in the
switch.
5. Change the setting of Menu #38 (OP FILTER) to “SSB” (if installing the YF-122S), or “CW”
(for the YF-122C/YF-122CN).
6. Filter installation is now complete.
BAND
DWN
UP
MODE
A
B
C
Figure 1
BAND
DWN
UP
MODE
A
B
C
YF-122S/YF-122C/YF-122CN
Mounting Location
Speaker's Connector
Optional Filter
MAIN Unit
Figure 2