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Topic: Mike noise problem |
mickd
From:
london,england
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Posted 11 Nov 2006 9:56 am |
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I have a Shure Unisphere 1 (Model 565D) that I use for recording steel on my PC. Sometimes it just gives a terrible buzzing noise which goes away if I move it about a bit. I thought there might be a loose wire so I took the cover off the jack and this is what is inside.
Does this look ok ?
i.e. the black wire is not connected, the shield is soldered to the outside of the jack and the greyish wire goes to the tip ?
Also, this mike has apparently got two impedance settings (high and low). Which one is best for plugging straight into my PC soundcard mike input ? |
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Jack Stoner
From:
Kansas City, MO
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Posted 11 Nov 2006 11:44 am
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Looks like a poor solder/connection job. May be a bad solder joint.
However, if you are going straight into a standard PC mic input, the volume level will be low. PC mic inputs want to see a much higher level signal. |
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 11 Nov 2006 3:26 pm
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Whoever did that flunked Soldering 101 and also gets a "D" in craftsmanship.  |
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mickd
From:
london,england
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Posted 12 Nov 2006 12:29 pm
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Thanks - I'll resolder it.
When it does work (most of the time) I seem to get a decent signal i.e. PC recording programs work ok, so I guess that must mean that the impedance setting is ok as it is.. |
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Gareth Carthew
From:
West Sussex, UK
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Posted 12 Nov 2006 12:42 pm
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That soldering leaves something to be desired. It could well be the problem.
I'd say a good start would be to resolder.
It could also be problem in the conductor inside the cable. After many times of flexing the wires making up the cable will break - most often in the ends of the cable where plugs connect.
This can lead to crackles and noise when the cable is moved.
If you've got enough cable I'd lop off a couple of inches and resolder the plug nicely. That what I often do with old noisy cables.
The grey wire and the black wire carry two oppositly phased signals - a "balanced" audio signal used with a 3 pin XLR connector or a TRS (also called stereo) phone plug. It's used to minimse noise on cable runs.
You will get an audio signal from either of them however one will be out of phase.
For use with a TS (mono) plug, only connect one of them to the tip. The other should be soldered to the screen.
[This message was edited by Gareth Carthew on 12 November 2006 at 12:48 PM.] |
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mickd
From:
london,england
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Posted 12 Nov 2006 2:52 pm
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Gareth
so you're saying I should solder the wire that's currently hanging free to the same 'pin' as the shield ? |
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Gareth Carthew
From:
West Sussex, UK
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Posted 12 Nov 2006 4:19 pm
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Yes.  |
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Ken Fox
From:
Nashville GA USA
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mickd
From:
london,england
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Posted 13 Nov 2006 12:02 pm
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Ken
thanks for the link ! I looked all over the place for that manual but I couldn't find the right one.
I disassembled the end as per the manual and it was set for HIGH impedance so looks like the wiring does follow the manual.
I just got a new soldering iron kit off Ebay so I'm all set  |
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