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Re: Hydrophone cables--formerly "extension cables"

Subject: Re: Hydrophone cables--formerly "extension cables"
From: "Robb Nichols" robb_nichols
Date: Thu Jan 28, 2010 9:47 pm ((PST))
If you are confident that this effect comes from the cable, you could 
certainly minimize the problem by cutting some out. But as mentioned 
already, the extra length can be useful.

If you're trying to minimize this microphonic effect, you probably have 
it wired into your XLR plug the best way. You might try connecting the 
signal between pins 2 and 3. I am not familiar with these hydrophones, 
but I suspect that you'd get a lot better low-frequency response and 
possibly lower noise if you use an impedance transformer or DI box 
between the hydrophones and preamp.

Grant Finlay wrote:
> --- In naturerecordists@ yahoogroups. com 
> <>, Robb Nichols <> 
> wrote:
> > Grant, Are you saying that the cable is microphonic, or that the
> > hydrophone is picking up sounds in air?
> The cable is microphonic, just looking for a simple solution..
> > It might be helpful to know what hydrophone you are using and how your
> > XLR adapter is wired.
> >
> > Regards, Robb
> they're from jez riley French @ http://hydrophones. blogspot. com 
> <>
> (I'm very happy with them otherwise, just would like to fix this small 
> issue.)
> Wired:
> pin 2 +
> pin 1&3 jumper
> The cables were used both coiled up or laid out flat, if that has any 
> influence.
> Regards, Grant.

"While a picture is worth a thousand words, a 
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause

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