THE RT-49 IS A MINIATURE TRANSMITTER AND WILL DELIVER OVER ITS FREQUENCY RANGE AN AVERAGE POWER OF 15 WATTS INTO RANDOM LENGTH ANTENNAS.

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A000700010001-8
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 9
• Document Creation Date: December 27, 2016
• Document Release Date: May 29, 2014
• Sequence Number: 1
• Content Type: REPORT

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STAT
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NO11
1. Normal hand-key cable connections are as follows:
Pins A&B: Jumpered at plug.
Pins D&F: Connected to hand-key.
2. The special cable referred to in paragraph E.5 is
wired as follows:
Pins A&B: Connected to hand-key.
Pins D&F: Jumpered at plug.
This permits the transmitter antenna relay to operate thereby
allowing break-In operation. However, serious consideration
should be given to the amount of audible noise generated by
this relay and its possible effect.
3. Delete this page prior to issuing the document.
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RT-49
TRANSMITTER
OPERATING INSTRUCTIONS
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A. INTRODUCTION
The RT-49 is a miniature transmitter and will deliver over its
frequency ra e an average power of 15 watts into rap.? ength
antennas. It sut frequency may be det 1 by a crystal,
crystal matrix, o fres s s nth . It covers a frequency
range of 3 to 24 megacycles be keyed at speeds up to 1200
words per minute. suires a 42 vs upply at approximately
1.5 amperes n automatic keyer, crystal or frequency
synth is used, a 12 volt DC supply at approxim ly 0.5
a eres will also be required.
B. DESCRIPTION OF CONTROLS AND SWI ES egies
1. KEY Button (2)
The Key button is used to key the transmitter during the
tuning process. It will not operate when a plug is in; Lel
?eit d in the keyer socE(3wTh!trhurti.
fhii-.5cculuifFr---F?nos external keying devices.
2. DRIVE TUNE Control (8)
The Drive Tune control ii.priiidsstaimadii.Wii I ii ft
iY
iiire.011,1940.014.piPiliPPPR'll...reefilli turns the
Drive Tune dial (7) and is adjusted to give maximum light
from the DR indicator lamp (9).
3. PA TUNE Control (II)
The PA Tune control irmgedirtTPIIMPLNIMPTILIIII,LIFIcy
togififtleuriliiilisibienesoMirl turns the
PA Tune dial (15) and is adjusted to give maximum light
from the PA indicator lamp (10).
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The Antenna Load control iiI?19911101111101Mil~elitirgelliCy
gililli?implIPPRIP1011.1.111.111001.1109.P.
11.111811,turns the Ant. Load dial (14) and is adjusted to
give maximum light from the Ant. Load indicator lamp 112).
5. Band Switch (16)
The Band switch is used to select one of the transmitter's
three radio frequency oriptal ranges.
C. PREPARATION FOR USE
1. With the transmitter's power supply turned off, connect
the power supply to the transmitter's power supply socket 141
2. Latch the power supply and the transmitter together with the
slide latch W.
3. Connect the transmit antenna by depressing the XMTR ANT.
connector post (17), inserting the wire in the connector and
releasing the connector. If the antenna being used has two
lead wires, connect the second wire to the GRD connector
post in the same manner in which the first wire was
con n'ia ed.
4. If no wire has been connected to the GRD connector post IP*
. in ste 3 above, connect an earth ground to this connector.
5 If a common transmit/receive antenna is desired ,nnect an
in e between the receiver's a nnector and
the REC ANT. co a common transmitter/-
receiver powe is also ?? delete this step and
referions.
appropriate power supply opera
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CIA-RDP78-03330A_000.7..999.1999,118,5 frequency determining source into its
appropriate socket. If a crystal is being used, it should be
plugged into the XTAL socket (6). If a crystal matrix or
frequency synthesizer is being used, its connecting cable
should be plugged into the VFO socket (5).
output frequency is between 3 and 12
the frequ s e sh e same as
the output frequency. If the . frequency is
between 12 and 24 i? , the frequency ?ning
source s9. . . ? one-half the output frequency.
7. Turn the band switch 4.1.6.1.to the frequency range, in mega-
that includes the desired output frequency.
8. Adjust the DRIVE TUNEA) and PA TUNE controls until
the desired output frequency, in megar. appears
beneath the red hair-line of their respective dials Rol%
9. Adjust the ANT. LOAD control 4891 until zero appears beneath
the red hair-line of the ANT. LOAD dial LIAtile
D. TRANSMITTER TUNING
1. Ensure that the transmitting antenna is connected to the
XMTR ANT, connector post41.1.4.
2. Turn on the transmitter power. (Refer to the appropriate
power supply operating instructions.
Depress the KEY button lel9and adjust the DRIVE TUNE control
484 for maximum light from the DR indicator lamp 014
Depress the KEY button 4/24 and adjust the PA TUNE control
90144 for maximum light from the PA indicator lamp (Ott
5. Depress the KEY button 4.1.1 and adjust the ANT. LOAD control
4100for maximum light from the ANT. LOAD indicator lampUilit
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CIA-RDP78-03330A0007,9991.99.01--8,.3 ON controls for maximum light from the
ANT. LOAD indicator lamp gal.
NOTE: Adjustments made to either the PA TUNE **or
ANT. LOAD fa! controls affect the other so the last adjust-
ment should always be made with the PA TUNE control (11).
7. Depress the KEY button al and readjust the DRIVE TUNE
control afor maximum light from the DR indicator lamp
awe
8. Check the dial readings of the DRIVE TUNE 410 and PA TUNE
au dial. These r6'adings should still approximate the
desired output frequency in megacycles. Any large variance
is indicative of mistuning and requires that steps 3 through
7 be repeated.
9. Turn off the transmitter power. tiiiisiassar elgrer149It
prosowookiaparatiaiiswiisiisese
E. TRANSMITTER OPERATION
1. After completion of the steps in paragraph D above, the
transmitter is ready for operation as soon as the transmitter
power is turned back on. It may be keyed manually by means
of the KEY button /a if required.
2. Normally, the transmitter will be keyed by an external keying
device connected to the keyer socket M. Transmitter power
should be turned off whenever inserting or removing the
keying connector from the KEYER socket IR
3. The transmitter power should be turned off between transmissons.
This statement is stressed for the following reasons:
a. The power supply battery's life is conserved.
b. When a common transmit/receive antenna is
used, removal of transmitter power allaws
the antenna to be switched from the transmitter
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to the receiver.
C. When a frequency determining device is connected
to either the VF04111, or XTAL 411 socket, strong
radio frequency signals will be emitted as long
as the transmitter power is on. This might
hinder or prevent reception of desired distant
signals.
4. Simultaneous transmission and reception of manual CW
(break-in operation) is not recommended when:
a. Transmit and receive frequencies are identical
and separate transmit and receive antennas are
used.
b. Transmit and receive frequencies are different
and a common transmit/receive antenna is used.
In this instance, break-in operation may be
used, if the situation warrants, by unplugging
the external keying device from the KEYER socket
*and keying with the KEY button fale
5. If break-in operation as described in paragraph 4. b is
normally required, a special keying cable will be pro-
vided.
F. MAINTENANCE
Due to the miniaturized construction of the transmitter, no
maintenance should be attempted. The transmitter should be re-
turned to base for exchange.
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1. Slide Latch
2. KEY
3. KEYER Socket
4. Power Supply Socket
5. VFO Socket
6. XTAL Socket
7. DRIVE TUNE Dial
8. DRIVE TUNE Control
9. DR Indicator Lamp
7 8 9. 10. 11. 12.
13.
10. PA Indicator Lamp
11. PA TUNE Control
12. ANT. LOAD Indicator Lamp
13. ANT. LOAD Control
14. ANT, LOAD Dial
15. PA TUNE Dial
16. Band Switch
17. XMTR ANT., GRD, REC ANT.
Connector Posts
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