Ten-Tec 243 - Page 7

80506 XTAL/OSC. SUBASSEMBLY
This
assembly
contains
all
of
the
switch
wafers
associated
with
the
REMOTE
switch,
the
transistor
switching
for the
15/10
meter
offset,
and
the
crystal
oscillator/buffer.
(20
meter
band.
SB.
REMOTE
switch
on
VFO
position.
MODE
in Voltage Readings - switch on position 3.)
[Pin
Transmit
Receive
Pin
Transmit
Receive
BY
0
11.9
6
0
0
B
0
11.9
VFO
LED
12.2
12.2
PTO
+REG
8.0
8.0
XTAL
LED
12.6
12.6
+REG
8.0
8.0
GND
0
0
+13
13.8
13.8
OUT
0
0
EXT.
OT
0%
3.0*
OT
3.5
3.5
(REMOTE
switch
on
X-1
position.
MODE
switch
on
position
3.)
Transmit Receive Pin Transmit Receive
0
12.0
c
0
12.0
0
0
VFO
LED
12.6
12.6
PTO
+REG
0
0
XTAL
LED
12.2
12.2
+REG 8.0 8.0 GND 0 0
+13
13.8
13.8
OUT
0
11.6
EXT.
OT
3.0*
3.0*
or
3.5
3.5
* Depends on setting of RI,
Semiconductor
Voltage
Readings
-
(Receive.
MODE
switch
on
position
3.
Crystal
installed in X-1 position.)
Transistor
Collector
Base
Emitter
VFO X-1 VFO X-1 VFO X-1
0
0
0.7
0.7
0
0
0.7
0.7
0.6
0.6
0
0
13.0
13.0
6.0
6.0
5.3
5.3
Transistor Drain Gate F Source
VFO X-1 VFO X-1 VFO KL
Q4 JFET 0 7.9 0 -3.2 0 0
8 s
Transistor pins
c E QT) D viewed from top
of PC board
Q4 ONLY
Evz-9