Cobra_19 Ultra Ii Cb Tranciever_manual

							Installation (Cont.)
Ignition Noise Interference
Use of a mobile receiver at low signal levels is normally limited by the
presence of electrical noise. The primary source of noise in automobile
installations is from the alternator and ignition system in the vehicle.
Under most operating conditions, when signal level is adequate, the
background noise does not present a serious problem. Also, when ex-
tremely low level signals are being received, the transceiver may be
operated with vehicle engine turned off. The unit requires very little cur-
rent an therefore will not significantly discharge the vehicle battery.
Even though the COBRAradio has an automatic noise limiter, in some
installations, ignition interference and other forms of automobile gener-
ated noise may be high enough to make good communications difficult.
The electrical noise may come from several sources. Many possibilities
exist and variations between vehicles require different solutions to
reduce the noise. Consult your COBRAdealer or a 2-way radio techni-
cian for help in locating and correcting the source of severe noise.
Base Station Operation (Operation from 120VAC, House Current)
To operate your transceiver from your home or office, using the regular
house current as the power source, you will require a 12VDC power
pack that has been specially designed for the purpose. It is available as
optional equipment from your COBRAdealer. It consists of a 120-volt,
60 Hz AC to 12-volt DC power converter with a 3Arating. Simply con-
nect the red (+) and black (-) leads of the transceiver to the correspond-
ing terminals of the power packs.
DO NOT ATTEMPT TO OPERATE THIS TRANSCEIVER BY 
CONNECTING DIRECTLY TO 120 VAC. SERIOUS DAMAGE
WILLRESULT.
Temporary Mobile Operations
To operate your COBRAtransceiver from a car on a temporary basis,
you may want to purchase an optional cigar lighter adapter from your
COBRAdealer. This adapter and a magnetic mount antenna allow you
to quickly install your transceiver for  temporary use.
Installation(Cont.) 
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							Controls and Indicators
Refer to controls, indicators and connectors as illustrated below:
A. Front Panel
1.Off/On/Volume. Turn clockwise to turn power on and set the
desired listening volume.
2.Squelch. This control is used to cut off or eliminate receiver back-
ground noise in the absence of an incoming signal. For maximum
receiver sensitivity, it is desired that the control be adjusted only to
the point where the receiver background noise or ambient back-
ground noise is eliminated. Adjust until the receiver noise disap-
pears. This will require the incoming signal to be slightly stronger
than the average receiver noise. Further clockwise rotation will
increase the threshold level which a signal must overcome in order
to be heard. Only strong signals will be heard at a maximum clock-
wise setting.
3.Microphone Connector. This front mounted, screw-on connector
allows for convenient removal of the microphone plug when storage
is required. The microphone MUST be connected to the unit at all
times when in use, for proper operation. The screw-on connection
enhances the life of the microphone cord as well.
4.Channel 9/Normal Switch. Used for instant selection of emergency
channel 9 (CH.9 position). In NOR position, all 40 CB channels are
selected by the UP/DOWN CHANNELBUTTONS.
Operation 
8
3
8
9
21
45
6
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							9
5.CB/PASwitch. Selects mode of operation. In the CB position, the PA
function is disabled and the unit will transmit and receive on the select-
ed channel. The PAfunction should not be used unless a PAspeaker is
connected.
6.S-RF/Power Meter. Shows relative transmitter RF output power
and input signal strength when receiving. The five LED (Light
Emitting Diode) segments glow to indicate receive or transmit
activity. 
7.TX Indicator LED. This indicator will light red when in the trans-
mit mode.
8.LED Channel Display. The selected operating channel will be dis-
played here.
9.Channel Selector Switch. When turned, this knob is used to select
any one of the forty citizens band channels desired.
For a ÒRAPIDÓ change of channels, depress and hold the desired
button (up and down). This allows all 40 channels to be covered in
about 6 seconds.
Other Operation Features
•Automatic Noise Limiter. This is a non-switchable feature that
is always on to reduce background noise.
Operation (Cont.) 
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							Operation (Cont.) 
C. Rear Panel
1.ANTENNACONNECTOR:This  SO-239 connector permits connec-
tion of the transmission line cable male connector to the transceiver.
2.PUBLIC ADDRESS:An external 8-ohm 4.0 watt PAspeaker may be
connected to the PASpeaker Jack when this unit is used as a public
address system. The speaker should be directed away from the micro-
phone to prevent acoustic feed-back. Physical separation or isolation of
the microphone and speaker must be employed when operating the PA
at high output levels.
3.EXTERNALSPEAKER:The External Speaker Jack is used for
remote receiver monitoring. The external speaker should have 8-
ohm impedance and be rated to handle at least 4.0 watts. When the
external speaker is plugged in, the internal speaker is automatically
disconnected.
4.POWER:These wires supply power to the CB radio. See page 5 for
installation.
10
1
23
4
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							Operation (Cont.) 
Operating Procedure to Receive
1.Be sure that the power, antenna and microphone are properly con-
nected before proceeding further. The CB/PAswitch should be in
the CB mode. The Channel 9/NOR Switch should be in the NOR
mode.
2.Turn the radio ON by rotating the VOLUME CONTROLclockwise.
3.Rotate SQUELCH CONTROLcounterclockwise until incoming sig-
nal is heard.
4.Turn the CHANNELSELECTORKNOB to select the desired oper-
ating channel.
5.Set the VOLUME CONTROLto a comfortable listening level.
Listen to the background noise from the speaker. Turn the SQUELCH
CONTROLslowly clockwise until the noise JUST disappears (no signal
should be present). Leave the control at this setting. The squelch is now
properly adjusted. The receiver will remain quiet until a signal is actu-
ally received. Do not advance the control too far, or some of the weak-
er signals will not be heard.
Operating Procedure to Transmit
1.Select the desired channel.
2.Press-to-Talk Switch.The receiver and transmitter are controlled by
the press-to-talk switch on the microphone. Press the switch and the
transmitter is activated; release switch to receive. When transmit-
ting, (on a clear channel), hold the microphone two inches from the
mouth and speak in a clearly normal voice.
Be sure the antenna is properly connected to the radio before
transmitting. Prolonged transmitting without an antenna, or a
poorly matched antenna, could cause damage to the transmitter.
Operating Procedure for Public Address
1.Connect a PAspeaker to the PAjack provided on the rear panel.
2.Set the CB/PAswitch to the PAposition.
3.Depress the push-to-talk switch on the microphone and speak in a
normal voice.
4.Adjust the volume of the PAspeaker using the Volume control on
the front panel.
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							Maintenance and Adjustment
Your COBRACB transceiver is specifically designed for the environ-
ment encountered in mobile installations. The use of all solid state cir-
cuitry and its light weight result in high reliability. Should a failure
occur, however, review the following, then if necessary replace parts
only with identical parts. Do not substitute. Refer to the schematic dia-
gram and parts list.
1.Check connections to the source of power and make sure it is the
13.8 VDC required to operate your radio.
2.Check the fuse in the DC power cord. The main power lead (red
wire) has a 2 Amp 3 AG type fuse installed. Use only the above spec-
ified type and size fuse for maximum protection. Failure to do so,
will void the warranty.
3.Make certain the microphone is properly plugged in.
4.Make certain the antenna is properly connected and tuned for mini-
mum SWR. NOTE: COBRAantennas include full instructions for
tuning your antenna. If youÕre still in doubt about the procedure,
contact the COBRAdealer from whom you purchased your radio
and antenna, for advice. If you hired an installer to install your radio
and antenna, contact him.
If you are unable to correct the problem, refer to the WARRANTYSER-
VICE INSTRUCTIONS at the end of this manual for the correct proce-
dure for warranty and post-warranty service from COBRA.
Adjustment Warning
Replacement or substitution of certain parts with replacements other
than those recommended by Cobra Electronics, may be a violation of the
technical regulations of Part 95 of the FCC Rules, or the Type Acceptance
requirements of Part 2 of said rules.
When making adjustments other than transmitter adjustments, be sure
to re-read applicable portions of this instruction manual to make certain
you are following correct procedure and that the radio was properly
installed, etc.
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							Appendix
Citizens Band radio operators have largely adopted the “10-code”for
standard questions and answers. Its use permits faster communications
and better understanding in noisy areas. The following table lists some
of the more common codes and their meanings:
CodeMeaningCodeMeaning
10-1Receiving poorly10-35Confidential information
10-2Receiving well10-36Correct time is
10-3Stop transmitting10-37Wrecker needed at
10-4OK, message received10-38Ambulance needed at
10-5Relay message10-39Your message delivered
10-6Busy, stand by10-41Please turn to channel
10-7Out of service, leaving air10-42Traffic accident at
10-8In service, subject to call10-43Traffic Tie up at
10-9Repeat message10-44I have a message for you
10-10Transmission completed,10-45All units within range
standing byplease report
10-11Talking too rapidly10-50Break channel
10-12Visitors present10-60What is next message num-
ber?
10-13Advise Weather/Band10-62Unable to copy, use phone
conditions10-63Net directed to
10-16Make pick up at10-64Net Clear
10-17Urgent business10-65Awaiting your next
10-18Anything for us?message/assignment
10-19Nothing for you, return10-67All units comply
to base10-70Fire at
10-20My location is10-71Proceed with transmission
in
10-21Call by telephonesequence
10-22Report in person to10-77Negative contact
10-23Stand by10-81Reserve hotel room for
10-24Completed last assignment10-82Reserve room for
10-25Can you contact10-84My telephone number is
10-26Disregard last information10-85My address is
10-27I am moving to channel10-91Talk closer to mike
10-28Identify your station10-93Check my frequency on
10-29Time is up for contactthis channel
10-30Does not conform to FCC rules10-94Please give me a long count
10-32I will give you a radio check10-99Mission completed, all
10-33EMERGENCYTRAFFICunits secure
10-34Trouble at this station10-200Police needed at
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							Appendix (Cont.)
14 AFew Rules That Should Be Obeyed
1.You are not allowed to carry on a conversation with another station for
more than five minutes at a time without taking a one-minute break, to
give others a chance to use the channel.
2.You are not allowed to blast others off the air by overpowering them
with illegally amplified transmitter power, or illegally high antennas.
3.You cant use CB to promote illegal activities.
4.You are not allowed to use profanity.
5.You may not play music in your CB.
6.You may not use your CB to sell merchandise or professional service.
How Your CB Can Serve You
¥Warn of traffic tie-ups ahead.
¥Provide weather and road information.
¥Provide help fast in event of emergency or breakdown.
¥Suggest good spots to eat and sleep.
¥Make long trips more interesting, and help keep you awake.
¥Provide direct contact with your office or home.
¥Make friends for you as you travel.
¥Provide local information to find your destination.
¥Help law enforcement officers by reporting drunk and reckless drivers.
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							15 YesÓAtornado sighted six miles north of town.Ó
NoÓThis is observation post number 10. No tornado 
sighted.Ó
YesÓI am out of gas on Interstate 95 at mile marker 121.Ó
NoÓI am out of gas in my driveway.Ó
YesÒThere is a four-car collision at Exit 10 on the Beltway, 
send police and ambulance.Ò
NoÒTraffic is moving smoothly on the Beltway.Ò
YesÓBase to Unit 1, the Weather Bureau has just issued a
thunderstorm warning. Bring the sailboat into port.Ó
NoÒAttention all motorists. The Weather Bureau advises
that the snow tomorrow will accumulate 4 to 6 inches.Ó
YesÒThere is a fire in the building on the corner of 6th and
Main Streets.Ò
NoÓThis is Halloween patrol unit number 3. Everything is
quiet here.Ó
Appendix (Cont.)
Use Channel 9 For Emergency Message Only
FCC give the following examples of permitted and prohibited types of
communications for use on Channel 9. These are guidelines and are not
intended to be all-inclusive.
Permitted:Example Message:
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							For technical assistance, please call our Automated Help Desk which can \
assist you
16
If You Think  You Need Service 
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