Re: mic cables
Make sure to get the WGT-15 model, with 1/4" plug. I couldn't find input
impedance informarion, so you might want to call or contact Nady. If it's
much under a meg, or unswitchable phantom powered, it's not good for crystal
On Friday, September 19, 2003 9:21 PM [GMT-7=PDT],Howard Chandler
> Oops, I forgot the link.
> ----- Original Message -----
> From: "Howard Chandler" <chandler@xxxxxxxxx>
> To: "Howard Herrnstadt" <herrnstadt@xxxxxxxxxx>; <harp-l@xxxxxxxxxx>
> Sent: Friday, September 19, 2003 10:53 PM
> Subject: Re: mic cables
>> Without getting all scientifical, the bottom line is to use a
>> balanced low impedance cable for long distances. These are just as
>> suseptable to static electrical charges (caused by the triboelectric
>> effect) but because the signal travels in a differential pair, any
>> noise common to both signal wires is canceled when the difference in
>> voltage is amplified. That's why PA mics (57's 58s etc), which are
>> often cabled long distances to front of house mixing boards are
>> lo-Z. If you're amplifying a Hi-Z mike (like a jt-30) than I agree
>> with Barbeque Bob. His solution A., using two transformers will
>> work, but who want's to be dragging a mic cable and transformers
>> around where it can be stepped on or catch on something. The
>> wireless units seem to be getting very reasonable in price these
>> days. If you like to go a wanderin', IMO this the way to go.
>> Here's one for under 100 clams. I only just looked this up on the
>> web. I've never used it, so this is not an endorsement.
>> Good luck.
>> Howard Chandler
>> ----- Original Message -----
>> From: "Joe Mahan" <joe.mahan@xxxxxxxxxxx>
>> To: <harp-l@xxxxxxxxxx>
>> Sent: Friday, September 19, 2003 9:01 AM
>> Subject: re: mic cables
>>> From: "Howard Herrnstadt"
>>>> I wonder if cables can be tested to show which ones have less
>>>> resistance. If a cable has a lower guage wire (i.e. thicker) it
>>>> might function more efficiently.
>>> The resistance won't be much of an issue for typical cable lengths.
>>> The more important factor is the tribolelectric characteristic of
>>> the wire. Good quality microphone cable has carbon-like powdery
>>> material in between the shield and the insulator to reduce the
>>> tendency of the cable to act like a piezo pickup and create
>>> electrical noise when the cable is moved.
>>> You can do a crude comparison of the triboelectric effect in cables
>>> by shorting one end, plug in the other end, and wiggling the cable.
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>> Harp-l is sponsored by SPAH, http://www.spah.org
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