|
RECEIVE MODE Audio circuit is open receive and common wires are closed |
In order to wire mics you need a basic understanding of how they work. The books tell you the color codes for many mics and which pins to solder them to on the connector for a given radio. But what if the mic is on it's third cord, who knows what color code the last owner used, and what if your brand of mic isn't listed.
THERE IS NO STANDARD COLOR CODE. Astatic, Cobra, Turner, and
Generic mics all have different color designations for each wire. For example, the red
wire on an Astatic mic is the Transmit wire, on Turner mics it's the common, and Cobra
uses it for the audio lead. The purpose of this tutorial is to give you the means to
figure out which function each wire is serving when you don't know the color code. All you
will need is an Ohm Meter or continuity checker, if you don't have either of these you
should be able to open the mic and see where each wire is connected to the switch. This
tutorial applies to the vast majority of 40 Channel CB radios made in the last 20 years,
with electronic switching. There may be rare exceptions and this does not apply to most of
the old 'relay switching' rigs.
|
RECEIVE MODE Audio circuit is open receive and common wires are closed |
Displayed is the common five wire microphone. This mic is shown with the PTT (push to talk) button released, and the radio in receive mode.
RECEIVE MODE: Audio circuit is open, receive and common leads are closed (connected
together through the switch)
TRANSMIT MODE: Audio circuit is closed, transmit and common leads are closed, (receive and
common are open)
Finding the audio lead:
The audio wire is always wrapped in the shield (bare wire), COOL, we've already figured out 2 of the wires.
Finding the Transmit lead:
With your ohm meter check the 3 remaining wires, check 2 wires at a time until you get continuity. The remaining wire you aren't testing is your transmit lead.
Finding the Common and Receive:
Now you must key the mic, press the PTT button in and hold it, a rubber band works, or have someone hold it for you. Check for continuity between the Transmit wire and the two unidentified wires one at a time, whichever wire reads continuity with the TX wire is the Common lead, the other wire is Receive!
TROUBLE SHOOTING
But my mic has 6 wires! It most all cases the 6th wire is not used, cut it off short enough so it won't short out against any of the pins on the mic connector.
Hey my mic only has 4 wires! The shield wire is used as the common.
My mic does have 5 wires, but my connector only has 4 pins!! In this case solder the common and shield wires to the same pin on the mic connector.
WHERE THE CHANNELS ARE??
Chan |
A |
B |
C |
D |
cb |
F |
G |
H |
I |
J |
|---|---|---|---|---|---|---|---|---|---|---|
1 |
25.165 |
25.615 |
26.065 |
26.515 |
26.965 |
27.415 |
27.865 |
28.315 |
28.765 |
29.215 |
2 |
25.175 |
25.625 |
26.075 |
26.525 |
26.975 |
27.425 |
27.875 |
28.325 |
28.775 |
29.225 |
3 |
25.185 |
25.635 |
26.085 |
26.535 |
26.985 |
27.435 |
27.885 |
28.335 |
28.785 |
29.235 |
4 |
25.205 |
25.655 |
26.105 |
26.555 |
27.005 |
27.455 |
27.905 |
28.355 |
28.805 |
29.255 |
5 |
25.215 |
25.665 |
26.115 |
26.565 |
27.015 |
27.465 |
27.915 |
28.365 |
28.815 |
29.265 |
6 |
25.225 |
25.675 |
26.125 |
26.575 |
27.025 |
26.475 |
27.925 |
28.375 |
28.825 |
29.275 |
7 |
25.235 |
25.685 |
26.135 |
26.585 |
27.035 |
27.485 |
27.935 |
28.385 |
28.835 |
29.285 |
8 |
25.255 |
25.705 |
26.155 |
26.605 |
27.055 |
27.505 |
27.955 |
28.405 |
28.855 |
29.305 |
9 |
25.265 |
25.715 |
26.165 |
26.615 |
27.065 |
27.515 |
27.965 |
28.415 |
28.865 |
29.315 |
10 |
25.275 |
25.725 |
26.175 |
26.625 |
27.075 |
27.525 |
27.975 |
28.425 |
28.875 |
29.325 |
11 |
25.285 |
25.735 |
26.185 |
26.635 |
27.085 |
27.535 |
27.985 |
28.435 |
28.885 |
29.335 |
12 |
25.305 |
25.755 |
26.205 |
26.655 |
27.105 |
27.555 |
28.005 |
28.455 |
28.905 |
29.355 |
13 |
25.315 |
25.765 |
26.215 |
26.665 |
27.115 |
27.565 |
28.015 |
28.465 |
28.915 |
29.365 |
14 |
25.325 |
25.775 |
26.225 |
26.675 |
27.125 |
27.575 |
28.015 |
28.475 |
28.925 |
29.375 |
15 |
25.335 |
25.785 |
26.235 |
26.685 |
27.135 |
27.585 |
28.025 |
28.485 |
28.935 |
29.385 |
16 |
25.355 |
25.805 |
26.255 |
26.705 |
27.155 |
27.605 |
28.035 |
28.505 |
28.955 |
29.405 |
17 |
25.365 |
25.815 |
26.265 |
26.715 |
27.165 |
27.615 |
28.055 |
28.515 |
28.965 |
29.415 |
18 |
25.375 |
25.825 |
26.275 |
26.725 |
27.175 |
27.625 |
28.065 |
28.525 |
28.975 |
29.425 |
19 |
25.385 |
25.835 |
26.285 |
26.735 |
27.185 |
27.635 |
28.075 |
28.535 |
28.985 |
29.435 |
20 |
25.405 |
25.855 |
26.305 |
26.755 |
27.205 |
27.655 |
28.085 |
28.555 |
29.005 |
29.455 |
21 |
25.415 |
25.865 |
26.315 |
26.765 |
27.215 |
27.665 |
28.105 |
28.565 |
29.015 |
29.465 |
22 |
25.425 |
25.875 |
26.325 |
26.775 |
27.225 |
27.675 |
28.115 |
28.575 |
29.025 |
29.475 |
23 |
25.455 |
25.905 |
26.355 |
26.805 |
27.255 |
27.705 |
28.155 |
28.605 |
29.055 |
29.505 |
24 |
25.435 |
25.885 |
26.335 |
26.785 |
27.235 |
27.685 |
28.135 |
28.585 |
29.035 |
29.485 |
25 |
25.445 |
25.895 |
26.345 |
26.795 |
27.245 |
27.695 |
28.145 |
28.595 |
29.045 |
29.495 |
26 |
25.465 |
25.915 |
26.395 |
26.815 |
27.265 |
27.715 |
28.165 |
28.615 |
29.065 |
29.515 |
27 |
25.475 |
25.925 |
26.375 |
26.825 |
27.275 |
27.725 |
28.175 |
28.625 |
29.075 |
29.525 |
28 |
25.485 |
25.935 |
26.385 |
26.835 |
27.285 |
27.735 |
28.185 |
28.635 |
29.085 |
29.535 |
29 |
25.495 |
25.945 |
26.395 |
26.845 |
27.295 |
27.745 |
28.195 |
28.645 |
29.095 |
29.545 |
30 |
25.505 |
25.955 |
26.405 |
26.855 |
27.305 |
27.755 |
28.205 |
28.655 |
29.105 |
29.555 |
31 |
25.515 |
25.965 |
26.415 |
26.865 |
27.315 |
27.765 |
28.215 |
28.665 |
29.115 |
29.565 |
32 |
25.525 |
25.975 |
26.425 |
26.875 |
27.325 |
27.775 |
28.225 |
28.675 |
29.125 |
29.575 |
33 |
25.535 |
25.985 |
26.435 |
26.885 |
27.335 |
27.785 |
28.235 |
28.685 |
29.135 |
29.585 |
34 |
25.545 |
25.995 |
26.445 |
26.895 |
27.345 |
27.795 |
28.245 |
28.695 |
29.145 |
29.595 |
35 |
25.555 |
26.005 |
26.455 |
26.905 |
27.355 |
27.805 |
28.255 |
28.705 |
29.155 |
29.605 |
36 |
25.565 |
26.015 |
26.465 |
26.915 |
27.365 |
27.815 |
28.265 |
28.715 |
29.165 |
29.615 |
37 |
25.575 |
26.025 |
26.475 |
26.925 |
27.375 |
27.825 |
28.275 |
28.725 |
29.175 |
29.625 |
38 |
25.585 |
26.035 |
26.485 |
26.935 |
27.385 |
27.835 |
28.285 |
28.735 |
29.185 |
29.635 |
39 |
25.595 |
26.045 |
26.495 |
26.945 |
27.395 |
27.845 |
28.295 |
28.745 |
29.195 |
29.645 |
40 |
25.605 |
26.055 |
26.505 |
26.955 |
27.405 |
27.855 |
28.305 |
28.755 |
29.205 |
29.655 |
Q CODES (mostly used on SSB AND HAM)
| QRA: What is the name of your station? QRB: How far are you from my station? QRC: Will you tell me my exact frequency? QRD: Where are you going and where are you from? QRE: When is your estimated time of arrival? QRF: Are you returning? QRG: What is my exact frequency? QRH: Does my frequency vary? QRI: How is the tone of my transmission? QRJ: Are my signals weak? QRK: What is the readability of my signals? QRL: Are you busy? QRM: Are you suffering from interference? QRN: Have you got atmospheric or static interference? QRO: Shall I increase transmitting power? QRP: Shall I decrease transmitting power? QRQ: Shall I transmit faster? QRR: Are you ready for automatic operation? QRS: Shall I transmit more slowly? QRT: Shall I stop transmitting? QRU: Anything for me? QRV: Are you ready? QRW: Shall I inform ... that you are calling on channel? QRX: Shall I wait? Will you call me again? QRY: Is it my turn? QRZ: Who is calling me? |
QSA: What is the strength of my signal? QSB: Are my signals fading? QSD: Is my key defective? QSK: On the side (Unofficial) QSL: Please ackknowledge reciept QSM: Shall I repeat last message? QSN: Did you hear me on channel ...? QSO: Can you contact ...? QSP: Will you relay to ...? QSR: Shall I repeat? QSS: what frequency will you use? QSW: Do you wish to transmit on this channel? QSU: Shall I send or reply on this frequency? QSX: Will you listen to ... on channel ...? QSY: Shall I change to channel ...? QSZ: Shall I transmit each word or sentence twice? QTC: How many messages do you have
for me? |
| QUA: Have you news of
...?
QUO: Shall I search for ...? QUD: Have you recieved the emergency signal sent by ...? QUR: Have survivors been picked up? QUF: Have you recieved the distress signal sent by ...? QUS: Have you sited survivors or wreckage? QUM: Is the emergency traffic ended ? QUT: Is the position marked? |
|
ANSWERS FOR Q CODES:
| QRA: The name of my station is ... QRB: The approximate distance is ... miles QRC: Your exact frequency is ... QRD: I am going to ... from ... QRE: My estimated time of arrival is ... QRF: I am returning QRG: Your frequency is ... QRH: Your frequency varies QRI: The tone of your transmission is ... QRJ: Your signals are weak QRK: Your signals are ...(1-5) QRL: I am busy QRM: I am suffering from interference QRN: I have got atmospheric or static interference QRO: I will increase transmitting power QRP: I will decrease transmitting power QRQ: I will transmit faster QRR: I am ready for automatic operation QRS: I will transmit more slowly QRT: I will stop transmitting QRU: I have nothing for you QRV: I am ready QRW: I will inform ... that you are calling on channel ... QRX: I will Wait. I will call you at ... QRY: It is your turn QRZ: You are called by ... |
QSA: Your signal strength is ... (1-5) QSB: Your signals are fading? QSD: Your key is defective QSL: I ackknowledge reciept QSM: I will repeat last message QSN: I heard you on channel ... QSO: I can contact ... QSP: I will relay to ... QSR: I will repeat QSS: I will use frequency ... QSW: I wish to transmit on this channel QSU: I will send or reply on this frequency QSX: I will listen to ... on channel ... QSY: I will Change to channel ... QSZ: I will transmit each word or sentence twice QTC: I have ... messages for you QTE: Your bearing is ... QTH: My position is ... QTI: My course is ... QTJ: My speed is ... QTL: My heading is ... QTN: My departure time is ... QTO: I have left port (dock) QTP: I am going to enter port (dock) QTR: The correct time is ... QTU: My station is open at ... QTV: I will listen for you on channel ... QTX: Listen for me until ... |
| QUA: I have news of
...
QUO: Please search for ... QUD: I have recieved the emergency signal sent by .. QUR: Survivors have been picked up. QUF: I have recieved the distress signal sent by ... QUS: I have sited survivors or wreckage QUM: The emergency traffic has ended QUT: The position is marked |
|
10 CODES (Mostly used on AM)
| 10-1 = Receiving poorly 10-2 = Receiving well 10-3 = Stop transmitting 10-4 = OK, message received 10-5 = Relay message 10-6 = Busy, stand by 10-7 = Out of service, leaving air 10-8 = In service, subject to call 10-9 = Repeat message 10-10 = Transmission completed, std by 10-11 = Talking too rapidly 10-12 = Visitors present 10-13 = Advise Weather/Road condition 10-16 = Make pick up at 10-17 = Urgent business 10-18 = Anything for us? 10-19 = Nothing for you, return to base 10-20 = My location is 10-21 = Call by telephone 10-22 = Report in person to 10-23 = Stand by 10-24 = Completed last assignment 10-25 = Can you contact 10-26 = Disregard last information 10-27 = I am moving to channel 10-28 = Identify your station 10-29 = Time is up for contact 10-30 = Does not conform to FCC rules 10-32 = I will give you a radio check 10-33 = EMERGENCY TRAFFIC |
10-34 = Trouble at this station 10-35 = Confidential information 10-36 = Correct time is 10-37 = Wrecker needed at 10-38 = Ambulance needed at 10-39 = Your message delivered 10-41 = Please turn to channel 10-42 = Traffic accident at 10-43 = Traffic tie up at 10-44 = I have a message for you 10-45 = All units within range please report 10-50 = Break channel 10-60 = What is next message number? 10-62 = Unable to copy, use phone 10-63 = Net directed to 10-64 = Net clear 10-65 = Awaiting your next message/assignment 10-67 = All units comply 10-70 = Fire at 10-71 = Proceed with transmission in sequence 10-77 = Negative contact 10-81 = Reserve hotel room fo 10-82 = Reserve room for 10-84 = My telephone number is 10-85 = My address is 10-91 = Talk closer to the mike 10-93 = Check my frequency on this channel 10-94 = Please give me a long count 10-99 = Mission completed, all units secure 10-200 = Police needed at |
10/25/14
