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LOW -L E V EL AUD IO JACK - High impedance, - - - - - - - - ,
low tevel receive r audio ou tput signal .for use
e
with RTTY converter o r othe r accessory. May
require additional ampli f ication an<!(C?' im-
pedance matching. Caí! also be ySed ~:es . an
audio input to receiver audio amplifier.
COUN T ER FUNCTION SW IT CH -
Place in - - - - - - ,
L
NOAM position for front panel display of
B
TR-7
operating frequency .
Place in EXT posi·
tion for use as a 150 MHz counter. (See
below.)
150 MHz COUNTER INPUT - Connect signa l
to
be
coun t ed
to
t h is
Jack and
p l ace
COUNTE R SW IT CH
in
E X T toread frequen ·
cy of ex terna! si gnal (2 volts rms, maxJ.
CAUT I ON: Do Not Overdrive .
FA N POWER -
Switched ou tlet for Model
A
1529 Fan .
•
AIA EX HAUST COV E R -
Leave pla te ove r
open i ng unless Model 1529 Fan is installed .
•
• •
. - - - - - - - -EXT EANAL ANTENNA - No rma lly interna!·
ly J um pered to E XT RCV R J ack. Remove
D
internal Ju mpe r and con nec t sepa ra te receive
an ten na to t his J ack if des ired.
- - - - - -- t XTERNAL RECEIVER - Normally int ernal-
ly J umpe red to EX T AN T Ja ck. Aem ove in-
E
terna t Jumpe r if
a
separate receive r fs used
and connec t rece iver antenna to this Jack .
P-----
KEY -
Accepts standa rd
1/4"·2
circu it phone
F
pl ug.
•
. 1------1
SPARE ACCESSORY JACK
EXTERNAL SPEAKER -
Accepts standard
G
1/4"·2 circui t phone plug,
ANT ENNA - Connect coax wit h Pl·259.
H
GRO UNO - Connect to good ea rt h or wate r
M
pipe grou nd .
•
2 4 6 8
1 12 9 6 3
10
1
11
1
- -
-
-
1 ·-
1
__
,_,
8 6 4 2
- - 11
©
•
•
16 15
POVVER INPUT - Mates w it h S-404-CC; • ____ _ _ _.
Pin
13
14
15
16
Function
+ 13.6 to P.A.
Gnd
+13.6 to Sw.
Gnd
•
1 3 5 7 9
PS7 CONTROL - Ma tes with S-3 10 - C C T - - - - - - - - - - - - - '
J
Pin
Function
1
AC from swi tch
2
AC to switch
3
NC
4
NC
5
NC
6
AC to fan
7
NC
8
VOX relay (li nea r)
9
A LC input
10
Gnd
* CINCH JONES (or equiv. )
----
1 ~
--
- - 11
7 5 31
•
10 7 4 1
REMOTE VFO - Mates with P-308-CCT *
l
Pin
Function
1
G nd
2
R V 7 PT O
3
+13.6 VDC
4
T ran sm it d isable
5
RV7 PT O enable
6
RI T
~
.... I""
7
AV7 Receive
8
RV7 T ransmit
' - - - - - - ACCESSORI ES - Ma tes with P-3 12-CCT *
K
Pin
Function
1
+10 VOC transmit
2
ACT source
3
Gnd
4
RCT source enable
5
RCT indicator enable
6
40 MHz
-
7
V LF antenna . -
8
T ransmi t disable
9
+ 13.6
v oc
10
PTT
11
VOX relay (Ax mute}
12
NC
Figure 3-2. Rear Panel Controls and Connections
OPERAT ION
3-5
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