BASIC MIC WIRING


ASTATIC WIRING AND TIPS


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.
 
 

basicmic.gif (7412 bytes)

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 

cb 

I

J

25.165 

25.615 

26.065 

26.515 

26.965 

27.415 

27.865 

28.315 

28.765 

29.215 

25.175 

25.625 

26.075 

26.525 

26.975 

27.425 

27.875 

28.325 

28.775 

29.225 

25.185 

25.635 

26.085 

26.535 

26.985 

27.435 

27.885 

28.335 

28.785 

29.235 

25.205 

25.655 

26.105 

26.555 

27.005 

27.455 

27.905 

28.355 

28.805 

29.255 

25.215 

25.665 

26.115 

26.565 

27.015 

27.465 

27.915 

28.365 

28.815 

29.265 

25.225 

25.675 

26.125 

26.575 

27.025 

26.475 

27.925 

28.375 

28.825 

29.275 

25.235 

25.685 

26.135 

26.585 

27.035 

27.485 

27.935 

28.385 

28.835 

29.285 

25.255 

25.705 

26.155 

26.605 

27.055 

27.505 

27.955 

28.405 

28.855 

29.305 

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?
QTE: What is my bearing from you?
QTH: What is your position?
QTI: What is your course?
QTJ: What is your speed?
QTL: What is your heading?
QTN: What is your departure time?
QTO: Have you left port (dock)?
QTP: Arte you going to enter port (dock)?
QTR: What is the correct time?
QTU: What hours is your station open?
QTV: Shall I listen for you on channel ...?
QTX: Listen for me until ...
 

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 

  11/18/08