Yaesu FT-2500M Technical Supplement page 24

D
Next locate the set of pads labeled
MOD
(c &
R), above connector J2008
(fig.
3).
Solder
a
10-kO chip resistor
across
pad
R,
and a
0-Q
chip resistor* across pad
C,
and
a
wire lead to
the adjacent pad. Pre-emphasized audio is
fed
to the transmitter here.
D Note the small plastic plug in the
chassis
cut-
out at the
rear
left
corner
of the CNTL
Unit
compartment. Remove this plug, then run the
leads
from your TNC through this cut-out and
solder them
to the appropriate leads on the
CNTL Unit.
Be sure
to insulate any
spliced
leads
with heat-shrink tubing
or
electrical
tape.
Fig.
4
TNC DATA IN/OUT Lead
Connections
Modification
for
9600-Baud Packet
0
After
checking
all
connections
for
integrity,
replace the
top
cover and tighten
all
screws.
This completes the modification.
While this modification should work
with
most
units, experimentation with audio input and out-
put
leoel may
be necessary before
optimum
per-
formance
is obtained.
03022
Ff-2500M
Technical Supplement
2-3