Yaesu FT-747GX User Manual

Optional TCXO Installarion
Optimum
stability can be
obtained
with the
FT-747GX
by
installing the
TCXO
(Tempera-
ture
Compensated Crystal
Oscillator) in
place
of
PLL
reference
crystal
X1004
on
the Local
Unit.
(l)
Referring
to
Figure
l, slide the
Local
Uni t upwards
to remove
it from the
Main Unit
and
provide
free access to
both sides of
the board.
Figure 1
(2)
Unsolder
and remove
rrimmer
TCl004,
crystal X1004
and
capacitors
Cl104 and
C I 105
(Figure
2). Use a
vacuum
solder
remover
or
solder
wick
to clean away
solder
from
around the holes
under the
TXCO
mounting
location.
(3)
Install the TXCO Unit
as shown in
Figure
3, and solder the
TCXO
case at
points
A
(Z
places),
and the
TCXO
leads at
B
(3
places).
Then
trim the leads,
and
reinstall
the
Local
Unit.
Figure
2

Yaesu FT-747GX Specifications

General

Brand	Yaesu
Model	FT-747GX
Category	Transceiver
Language	English