rec.arts.movies.production.sound

On Sep 12, 9:44 am, Larry Fisher wrote:
> Hi Doug,
> The key here is that the current is fairly low, a tenth of an amp,
> which makes up for the high resistance.
> Best Regards,
> Larry Fisher
> Lectrosonics
>
> On Wed, 12 Sep 2007 07:28:43 -0700, "Douglas Tourtelot"
>
> wrote:
> >Really? Wow, I would have thought that it wouldn't work. Learn something
> >every day.
>
> >D.
>
> >"Larry Fisher" wrote in message
> >news:pssfe39gs8kbqpi94d3qgacprbihd3j97h@ ...
> >> Hi Scott,
> >> Here's the numbers:
> >> Assume the device is pulling 100 mA (that's high). One hundred feet of
> >> #22 out and back is Ohms ( Ohms/1000'). The voltage drop will
> >> be I x R or .1A x Ohm= Volts. A third of a Volt is
> >> negligible. In short, a run of #22 hundred feet will be fine and 300
> >> feet is workable (1 Volt drop).
> >> Best Regards,
> >> Larry Fisher
> >> Lectrosonics
>
> >> On Tue, 11 Sep 2007 17:34:47 -0700, scottc...@ wrote:
>
> >>>How far can you effectively run 12 Volt DC down a piece of Canare
> >>>cable? I was thinking of making my Comtec and IFB transmitters so I
> >>>could run them out 100 feet if needed. It would be great if I could
> >>>send them power from my PSC Power Max supply. I may just have to
> >>>resort to a NP1 if I need to run them out.
>
> >>>Just curious,
> >>>scott