Question about Connex 3300 240-Channels Base CB Radio

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Standard Microphone Wiring

Could someone please tell me the proper color combination and wiring pattern for a standard hand held microphone for this particular radio? (Connex 3300 240 channel export radio.)

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  • el sordo May 13, 2008

    need to know how to wire the 4 pin mic for my ft-101e

  • ky coalminer Mar 15, 2009

    i need to know how to wire a cobra hand mic to this radio the wire colors are the same except the black this mic has a blue wire in it

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  • 19 Answers

Pin 1 is Shield(most mics this wire is bare copper) Pin 2 is Audio wire(most mics this wire is white) Pin 3 is Transmit(most mics this wire is red) Pin 4 is receive(most mics this wire is black)

Posted on Aug 01, 2007

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The simplest way is to order a microphone adapter from ebay or a reputable CB shop. I have all my mics wired for standard 4 pin cobra. The standard 4 pin cobra is the most common and if you keep adapters handy then you can use all different kinds of mics on different radios.

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Have a Shure SLX Wireless System. The only way the microphone SLX1 or SLX2 is if they are right up to your mouth. If you put the lapel mic on a persons tie you can't hear them. The transmitter is set to...


The Shure SLX2 hand-held microphone has similar performance characteristics to the much-loved (cabled) Shure SM58 vocal microphone. It has a 'cardoid pick-up pattern' intended for close work - being spoken / sung straight into the top of the capsule at no more than about 8 inches from the mouth of the user- to minimise feedback and extraneous noise. If you double the distance between the mouth and microphone the sound level will drop four-fold so distance really matters.
The SLX1 lapel/ lavalier is a semi 'omni-directiona'l pick up pattern microphone, which should work satisfactorily up to 12 inches from the speakers mouth, but closer is better. Always try to get your users to hang it about 6 inches below their chin, at most, and preferably with the top of the microphone capsule pointed upwards towards the mouth.
Here are a few other things for you to try:
  1. There is a volume (gain) knob on the back panel of the SLX receiver unit. Try turning this up to maximum (needs a small screwdriver)
  2. Make sure that both aerials on the receiver are fully extended at different angles to each other and in a clear 'line-of'sight' with the transmitter pack, with no large bits of metal in between which could block the signal. Ideally the receiver should not be more than 25metres from the transmitter. If distance is a problem locate the receiver near to the transmitter and run a balanced (xlr) cable to your mixer/ amplifier.
  3. The angle that the receiver aerials are at should be broadly similar to the angle that the transmitter antenna is at to optimise signal reception.
  4. Make sure the receiver is not located too close to other electrical equipment which may be interfering with the signal (especially voltage transformers, CD or DVD players and hearing loop induction amplifiers which have a strong magnetic field)
  5. Always use good quality batteries - Duracell Ultra or equivalent ( do not use rechargeable batteries as they seldom achieve optimum voltage)
  6. Check that the antenna is tightly screwed into the SLX1 transmitter pack and not damaged.
  7. The SLX2 hand-held microphone has an adjustable level switch inside the body - unscrew the top of the microphone to access it - switch to maximum.
  8. Another possible cause could be an impedance mis-match between the SLX receiver and your amplifier or mixer. There are two outputs on the rear panel of the receiver. One is an XLR (large 3 pin socket) this is LOW impedance and needs connecting to a low impedance input on your mixer/amplifier. You should normally be using this output even if your amplifier has a jack-socket input (use a proper balanced XLR to 6mm trs jack cable rather than a adapter plug). The other output on the receiver unit is a 6mm HIGH impedance, unbalanced, standard jack socket (labelled 'line in'). This would normally be to connect to a guitar amplifier which has a high impedance 'line level' input socket. If you are using this output you may need to use a pre-amplifier to get a big enough signal for a microphone.
You can find the Shure SLX user manual here http://www.shure.com/idc/groups/public/documents/webcontent/us_pro_slx_en_ug.pdf

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1 Answer

Can you tell me the plug wiring mike end


It should be standard balanced XLR. The wiring is 1= ground/shield, 2=hot(+ve), 3=cold (-ve). Do not bridge any of the pins especially not 1 and 3 if you are using phantom power with this microphone. Let me know if this helps please.

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The wiring has snapped from the mic to the xlr socket on the microphone is there somewhere i can get a diagram to fix it? the mic is a se electronic z3300a


It uses a standard balanced XLR wiring which is 1= ground/shield, 2= (+ve) hot and 3 is (-ve) cold. Do not bridge pins 1 and 3 as this mike uses phantom power. Please let me know if this helps.

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Wiring diagram for accessory plug needed.


I am looking for the same wiring diagram. The headset Moto sells is a single earpiece with microphone, so how does that end up being a stereo connection Neto? Just curious how, or is there also a full headset with microphone? ( I dont' know, just asking)

Would this be a 4 ring TRS connector? Sleeve = ground, then left, right, and the tip as the microphone??

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If we're talking about the microphone cable wiring on a low impedance mic remember this. Cheap mic cables with XLR's on both ends often have no standard color code to follow. True pin 1 is ALWAYS ground (shield wire) but the other two wires could be any color of the rainbow. Look for small numbers beside each pin of the XLR connector and make sure that pin two on one end of your cable, is also pin two on the other end as well....etc. Special note: The XLR connectors set screws have reversed threads and it's the same for the XLR male plug in the bottom of the microphone as well.....Glen

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According to the astatic wiring hand book it is not used. I would leave it terminated but long enough that if you find your having noise when you receive you could still ground it. I'm pretty sure you don't need it.

Goodluck
Rob

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