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extension cables

Subject: extension cables
From: "vickipowys" vpowys
Date: Fri Jan 22, 2010 2:34 am ((PST))

I have been happily using a Telinga 'LS-10' stereo mic with PIP (plug  
in power) connected to an Olympus LS-10 recorder, with a shielded  
extension cable measuring 7 metres.

What I would like to know is what is the potential maximum length of  
cable I could use with such a set up?  Fifty metres?  Or less than that?

I am well away from civilization and radio waves although I do have  
mains power connected to my house, and have found that I need to use  
shielded cable to prevent mains hum.

The sort of cable I mean will have 3.5mm plugs and sockets.  I have  
ordered some 2-core shielded cable, but while I await its delivery I  
am hoping someone might comment on cable length.

Any suggestions?

Vicki Powys

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