RR/D-11 RECEIVER

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A000700210001-6
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 8
• Document Creation Date: December 27, 2016
• Document Release Date: May 29, 2014
• Sequence Number: 1
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2014/05/29: CIA-RDP78-03330A000700210001-6
STAT
i Declassified in Part - Sanitized Copy Approved for Release 2014/05/29: CIA-RDP78-03330A000700210001-6
Declassified in Part - Sanitized Copy Approved for Release 2014/05/29: CIA-RDP78-03330A000700210001-6
RR/D-11 Receiver
A. INTRODUCTION
The RR/D-11 receiver will receive Morse code, tone, or
voice signals in the short wave band from 100 to 10 meters
(3000 to 30,000 kilocycles). The receiver is simple to
operate and requires very little power. Although the re-
ceiver is not completely waterproof, it is water resistant.
B. DESCRIPTION OF SWITCHES, CONTROLS, AND TERMINALS
1. Function Switches Numbered 1 and 2 (FS1 and FS2).
Function switches numbered 1 and 2 are used to turn
the following on and off: power, receiver calibration,
manual control, and automatic gain control. As shown on the
instruction plate placed alongside the switches, each
switch is placed in the direction of the arrows to provide
the desired operation. The power is always on when the
switches are placed in the AGC, MAN, or CAL positions.
2. Nine-pin Receptical (14).
When the receiver is operated with a compatible
transmitter, the transmitter will supply a ground, antenna,
and power through the nine-pin receptical. When the re-
ceiver is operated separately from the transmitter, power
only is provided via the nine-pin receptical.
3. Band Switch (3).
The frequency band switch is used to switch the
receiver to either the 3 to 12 MC, or to the 12 to 30 NC
band. Although the band switch is marked in megacycles
(MC), the frequency dials are marked in kilocycles (KC).
One megacycle is equal to 1000 kilocycles; therefore, 3-12 MC
is 3000 to 12000 KC and 12-30 MC is 12000 to 30000 KC.
4. Frequency Dial (8) and Tuning Control (9).
The tuning control (9) is rotated to read the freq-
uency in kilocycles on the frequency dial (8). The band
switch must be placed in the 3-12 MC position. WARNING: Do
not rotate the tuning control to a dial reading below 02950
or above 12050, or the dial mechanism may be damaged.
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5. Frequency Dial (10) and Tuning Control (11).
The tuning control (11) is rotated to read the frequency
in kilocycles on the frequency dial (10). The band switch must
be placed in the 12-30 MC position. WARNING: Do not rotate the
tuning control to a dial reading below 11950 or above 30050, or
the dial mechanism may be damaged.
6. Antenna Terminal (4).
When the receiver is operated separately from a com-
patible transmitter, the antenna lead-in wire is connected to
the antenna terminal. No separate ground connection is used when
the receiver is operated in this manner.
7. Volume Control (5).
The volume control is rotated clockwise to increase, and
counterclockwise to decrease the sound.
8. Calibrate Control (6).
The calibrate control is used to adjust the receiver so
that frequencies can be read accurately on the dials.
9. Phones Terminals (12 and 13).
Phones terminal (12) is grounded; phones terminal (13)
is ungrounded.. To receive signals, headphones are plugged to
both terminals without regard to polarity.
C. CONNECTION TO A COMPATIBLE TRANSMITTER
If you are provided with a transmitter that has a nine-pin
receiver socket, plug the RR/D-11 directly into the receiver
socket on the transmitter. After power, ground, and antenna
have been connected to the transmitter, the transmitter will
supply all of these to the receiver.
D. SEPARATE CONNECTION
1. To Connect Power.
a. If you are provided with the small battery (16)
shown in the illustration, plug the battery directly into the
receiver.
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b. If you desire to power the receiver by a twelve
volt battery, make the following connections: first plug the
12 volt power connector (15) into the nine-pin receptical (14);
then connect the red covered alligator clip to the positive-W
battery terminal, and the black covered alligator clip to the
negative (-) battery terminal.
2. To Connect the Antenna.
Remove a small bit of insulation from the antenna lead-in
wire, depress the top of the antenna terminal (4), and insert the
wire in the sms11 hole at the bottom of the terminal. A ground
connection is not made and the receiver will operate satisfactor-
ily without a ground. If using separate antennas for both the
transmitter and receiver, never let the receiver antenna touch
the transmitter antenna; try to keep both antennas separated from
one another by 2 or 3 meters. Refer to separate instructions re-
garding antenna erection.
E. FREQUENCY CALIBRATION
1. The receiver should be calibrated at the 500 KC point
nearest to the desired operating frequency. That is, if the
desired frequency is 8275 KC, the receiver is calibrated at 8500
KC. For band 3-12 MC, calibration points begin at 14.000 KC and
are found at every 500 KC point to 12000 KC (4500, 5000, 5500,
6000, etc.). For band 12-30 MC, calibration points are found at
every 500 kc from 12000 to 30000 KC.
2. Connect power to the receiver, connect headphones to the
phones terminals, disconnect the antenna, and place FS1 and FS2
switches in the direction of the CAL arrows.
3. Set the band switch to the proper band. Adjust the
tuning control (corresponding to the band selected) to the
nearest 500 kc point. Example: For 16784 KC, the band switch
is set to 12-30 and the tuning control is adjusted exactly to
17000.
4. Adjust the volume control to about the mid position. Set
the CW control (7) to the arrow.
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5. Rbtate the calibrate control (6) until a tone is heard.
Two tones will be heard; one tone one-half turn of calibrate con-
trol from the other tone. If more than two tones are heard,
lower, the receiver volume. Either of the two tones may be used
to calibrate the receiver. After one of the tones is heard,
SLOWLY rotate the CAL control until the sound disappears, but may
be heard if the calibration control is moved slightly to the right
or left. It is not necessary to eliminate the sound Completely; a
low pitched, pulsating (beating) sound will provide accurate cali-
bration.
6. Note. If the antenna is not removed from the receiver,
radio signals may interferewith the calibration signal. If the
receiver is operated with a compatible transmitter, remove the
antenna at the transmitter.
F. OPERATING AND TUNING int, RECEIVER
1. Place switches FS1 and FS2 in the OFF position.
2. Plug the receiver to the transmitter, or connect a power
source.
3. Calibrate the receiver as described above.
4. After calibration is accomplished, the band switch will
be set in the proper position and the fi.equency dial will be set
close to the desired frequency. If a separate power source is
being used, connect the antenna to the receiver. Increase the
setting of the volume control.
5. Set switches FS1 and FS2 in the AGC position for voice or
tone signals, and in the MAN position for Morse code signals.
Set the CW control to OFF for reception of voice or tone signals.
6. Rotate the tuning control until the desired frequency is
shown in the frequency dial window. SLOWLY rotate the tuning
control to the right and to the left until the desired signal is
heard as clear and as loud as possible. For Morse code signals,
adjust the CW control to the right or left to vary the pitch of
the signal.
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7. Adjust the volume control to a level necessary to copy the
signal. When other radio signals interfere, a lower volume level
may help to receive through the interference. When the desired
signal intensity increases or decreases; adjust the volume control
for best listening at the lowest level of the signal.
8. If the signal appears to slowly move away from its
frequency setting, it may be necessary. to VERY SLIGHTLY readjust
the tuning control. During interference from other signals,
slight adjustment of the tuning control; or adjustment of the CW
control (for Morse code signals) may improve reception.
G. MAINTENANCE
There are no spare parts supplied with; nor is there any
maintenance to be performed on the 1R/D-11. Most of the circuits
are on printed boards, and the set is fully transistorized. If
the simple trouble checks given below dO not clear a trouble; any
repairs deemed necessary may be performed.
1. No sound is heard in the headphones.
a. Check all connections at the battery. Check that power
connections are properly made at the receiver. If possible, check
the battery voltage at the transmitter.
b. Check the headphones by momentarily touching the phone
cord tips to the terminals of a flashlight battery. Touching
across one terminal of a 12 volt battery would not harm the phones,
but do not touch the phones across the entire battery. When the
phones are momentarily touched across a tmall battery, a click in
the headphones indicates that the phones are not defective.
2. The receiver operates; but signals are weak.
a. Check for a weak battery and charge the battery if
necessary. If a plug-in battery is used; replace with another
battery.
b. Check the complete antenna system to insure that no
part of the antenna or lead-in is grounded. (Grounded means making
an electrical connection with the earth.) Also, check to insure
that all antenna connections are making good electrical contact.
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H. OPERATION FROM. A 6 VOLT STORAGE BATTERY.
To operate from a 6 volt storage battery, a 6 volt power
connector is required. However, wiring changes may be made to
the 12 volt power connector (15) so that a 6 volt battery can
be used. To make these changes:
a. Obtain a soldering iron, solder, and screw driver.
b. Remove the two screws and nuts from the top of the
nine-pin plug of connector 15. Loosen the two bolts of the
cable clamp. Pull the plug from the metal enclosure.
c. Unsolder and remove the jumper wire from connections
5 and 6. Remove the red wire from connection 8 and solder the
wire to connection 6.
d. Power connector 15 will now operate the receiver
from a 6 volt battery. WARNING: Do not use the rewired 6 volt
power connector to power the receiver from a la volt battery
unless the connections are changed back to their original
positions.
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Declassified in Part - Sanitized Copy Approved for Release 2014/05/29: CIA-RDP78-03330A000700210001-6
RR/D-11 Receiver
1.
Function Switch No. 1
9.
Tuning Control for 3-12MC
(FS1)
10.
Frequency Dial for 12-30MC
2.
Function Switch No. 2
11.
Tuning Control for 12-30MC
(FS2)
12.
Grounded Phones Terminal
3.
Band Switch
13.
Ungrounded Phones Terminal
4.
Antenna Terminal
14.
Nine-pin Receptical
5.
Volume Control
15.
Power Connector for 12 volt
6.
Calibrate Control
Battery
7.
CW Control
16.
Plug-in 6 volt Battery
8.
Frequency Dial for 3-12MC
6
7
14 13 12
Declassified in Part - Sanitized Copy Approved for Release 2014/05/29: CIA-RDP78-03330A000700210001-6