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4 pin microphone cobra

??? ?????? #49800 Hello everyone i want to ask about how can i wiring the cobra 4 pin microphone , cobra 4 pin microphone has 4 elements (TX,RX,Audio, Ground) but the ubitx has only 3 pin for mic which is Mic to ( audio) , PTT to TX , GND to ground and what about the RX ??
Marc Jones All Messages By This Member #49807 Rx isnt needed as the radio receives with the n ed for any special mic connections ,? braid is common, You then have the transmit wire and the audio wire , Audio wire is normally inside the braid so as to shield it , You may need to put a capacitor in series with the audio wire to block DC . toggle quoted message Show quoted text On Sun, 20 May 2018 at 13:58, ??? ?????? <hamad.kalid@...> wrote: Hello everyone i want to ask about how can i wiring the cobra 4 pin microphone , cobra 4 pin microphone has 4 elements (TX,RX,Audio, Ground) but the ubitx has only 3 pin for mic which is Mic to ( audio) , PTT to TX , GND to ground and what about the RX ??
Bill Maxwell All Messages By This Member #49915 开云体育 I assume your Cobra 4 pin microphone has a speaker in it too, so is actually a speaker/mic? If so, the uBITX does not provide a speaker connection at the microphone, therefore no RX connection, although you could add it if you want it. Bill VK7MX On 20/05/2018 10:58 PM, ??? ?????? wrote: toggle quoted message Show quoted text Hello everyone i want to ask about how can i wiring the cobra 4 pin microphone , cobra 4 pin microphone has 4 elements (TX,RX,Audio, Ground) but the ubitx has only 3 pin for mic which is Mic to ( audio) , PTT to TX , GND to ground and what about the RX ??
??? ?????? #49916 How can i add rx ? toggle quoted message Show quoted text On Mon, 21 May 2018, 12:51 pm William R Maxwell, <wrmaxwell@...> wrote: I assume your Cobra 4 pin microphone has a speaker in it too, so is actually a speaker/mic? If so, the uBITX does not provide a speaker connection at the microphone, therefore no RX connection, although you could add it if you want it. Bill VK7MX On 20/05/2018 10:58 PM, ??? ?????? wrote: Hello everyone i want to ask about how can i wiring the cobra 4 pin microphone , cobra 4 pin microphone has 4 elements (TX,RX,Audio, Ground) but the ubitx has only 3 pin for mic which is Mic to ( audio) , PTT to TX , GND to ground and what about the RX ??
Bill Maxwell All Messages By This Member #49917 开云体育 Rx is receive audio, so simply connect your uBITX speaker connection to that connection on the Cobra and you should hear the received audio through the speaker in the Cobra speaker/mic. On 21/05/2018 8:32 PM, ??? ?????? wrote: toggle quoted message Show quoted text How can i add rx ? On Mon, 21 May 2018, 12:51 pm William R Maxwell, <wrmaxwell@...> wrote: I assume your Cobra 4 pin microphone has a speaker in it too, so is actually a speaker/mic? If so, the uBITX does not provide a speaker connection at the microphone, therefore no RX connection, although you could add it if you want it. Bill VK7MX On 20/05/2018 10:58 PM, ??? ?????? wrote: Hello everyone i want to ask about how can i wiring the cobra 4 pin microphone , cobra 4 pin microphone has 4 elements (TX,RX,Audio, Ground) but the ubitx has only 3 pin for mic which is Mic to ( audio) , PTT to TX , GND to ground and what about the RX ??
Lee All Messages By This Member #49919 4 wire CB microphones are not speaker mics.?? There is audio line and ground.? When the PTT is not pressed the RX line is grounded and the receiver works through the speaker.? When you press the PTT it un-grounds the RX and turns off the speaker and grounds the TX line and transmits.?? Putting a resistor from RX to ground would leave the receiver output on a little making what they used to call "Talk Back"..?? You could hear yourself a little which they like if they used an echo or reverb microphone. -- Lee - N9LO? "I Void Warranties" ?
Bill Maxwell All Messages By This Member #49967 开云体育 Ah, thanks Lee. You have added to my knowledge of such microphones and hopefully helped our other poster. Bill VK7MX On 21/05/2018 10:30 PM, Lee wrote: toggle quoted message Show quoted text 4 wire CB microphones are not speaker mics.?? There is audio line and ground.? When the PTT is not pressed the RX line is grounded and the receiver works through the speaker.? When you press the PTT it un-grounds the RX and turns off the speaker and grounds the TX line and transmits.?? Putting a resistor from RX to ground would leave the receiver output on a little making what they used to call "Talk Back"..?? You could hear yourself a little which they like if they used an echo or reverb microphone. -- Lee - N9LO? "I Void Warranties" ?

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