Question about Shure 450 Series II Professional Microphone

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Getting it wired right

I am an old Ham with an old Swan 500C Radio. Swan wants audio on tip of the plug rather than on sleeve. I have Red on sleeve, green on tip of the plug, all other wires go to ground. I always thought white would be audio but that does not work either. It turns off and on OK but no audio. What am I doing wrong, please. Thanks Chuck chuckn4mis@yahoo.com

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The tip is red and the ring should be green and the othe wires should be on the sleeve.

Posted on Aug 22, 2008

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C1000s hum/buzz on phantom power


possibly the microphone needs more power than your sound card can supply although I cannot imagine as the duet is a good piece of equipment.
Is the duet USB bus powered?
Have you tried another cable? Possibly one wire is defective which means that phantom power will superpose the audio signal. In this case you might hear a hum. By the way this results in 6dB of signal loss. This is why XLR plugs have 3 wires. If connected with a 1/4" jack it has to be a stereo plug (tip, ring, sleeve)

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The Heil "ICM" microphone is designed to be used with certain Icom brand ham radios. These have a 8-pin round plug. Describing the pinout to you will depend upon your perspective, whether you are looking at it from the microphone plug itself, or the microphone socket on the front of the radio. Therefore, from the perspective of looking at the mic plug on the end of the mic cable, note that there is a notch or dimple in the plug that also lines up with the screw. Going clockwise from the notch, the pins are numbered 1 thru 7. Pin #8 is the center pin.
Pin 1 = mic input
Pin 5 = Push-to-talk (PTT)
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Pin 7= Mic ground

From the standpoint of an Icom transceiver, the remainder of the mic connector pins are as follows:
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Re Sennheiser presentation set Model No 21101 - I have no power to my receiver. The unit is plugged in to the mains and the socket is live as I have checked it by plugging in a table lamp which works fine....


The AC to DC "wall-wart" power supply is defective. Take the original to Radio Shack and have them sell you a replacement. No, RS isn't probably the quality of the original Sennheiser, but it will get you through your gig. PLEASE note the polarity of the tip-to-sleeve and match it up identical to the original power supply.

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1 Answer

Microphone plug diagram


XLR....pin 1 = gnd, pin 2 = hot and pin 3 = cold
1/4" mono plug has gound and tip is hot
1/4" stereo...tip = hot, ring = cold and sleeve = gnd.

http://en.wikipedia.org/wiki/XLR_connector

Feb 20, 2013 | Microphones

1 Answer

Audio-Technica freeway 200 Series VHF Wireless System - I had problems connecting the wireless system with a quarter inch to a xlr. The sound system made a very loud disturbance sound. What cable do I use...


XLR connectors are a two-wire plus ground system. Using a 1/4 inch to XLR adapter may not connect the wires correctly to your sound system input.

The A-T Freeway 200 Series has a 1/4" output jack. This would indicate a line level. A cable to connect the tip of the 1/4" jack to pin 2 of the XLR and the sleeve of the 1/4" jack to pins 1 and 3 of the XLR should work. The XLR should be plugged into a device that accepts line level.

Ideally, you should plug the 1/4" into a 1/4" or RCA jack that is designed for line levels.

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1 Answer

Is there a spiecal jack plug for a microphone. stupidly cut old plug off and threw it away without looking at the wiring


You can actually wire it up with any type of connection you need. The most common are a ts (tip sleeve) 3.5mm Jack; a 6.35mm 1/4 inch Jack or an XLR connection.

It just depends on what you're plugging into.

Hope this helps

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Hi i need to know the color code to assemble a new 3 prong stereo 1/4 inch jack for a shure sm 58 microphone. i need to know the order and color to reassemble the mic cable to a new 1/4 inch guitar type...


Unfortunately, different cables use different colors of wires. Thus, you'll have to see what colors are connect to both ends of the cables. Here is the wiring:

XLR -> 1/4 inch
Pin 1 -> Sleeve
Pin 2 -> Tip
Pin 3 -> Sleeve

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