AT875R and Phantom Power

[Phil vG]

I was just wondering, If I was to get a AT875R and run it off the camera, by what length of time would i be reducing the charge on the camera battery?

I get about 5 hours out of a charge right now.

Or is that not how Phantom Power works?

 

[GaryNattrass]

Phantom power does use more of your camera battery power but it is so insignificant I would not worry about it.

I have phantom feeding my camera mic all the time and have not noticed any significant loss of life.

The 875r draws around 2mA BTW: http://www.audio-technica.com/cms/resource_library/literature/65fd393dfad862d3/at875r_ss_e.pdf

 

[combatentropy]

The 875r draws around 2mA

2 milliamps, wow. That's 2 thousandths of an amp (0.002 amps). Doesn't that work out to about a tenth of a watt? (0.002 amps x 48 volts = 0.096 watts)

I knew microphones didn't take a ton of electricity, but I never looked up exactly how much they used.

 

[GaryNattrass]

Yes and the ambient temperature will probably have more effect on your battery life, think of it a 1.5v duracell powers most simlilar shotgun mic's and will last a long long time!

 

[Phil vG]

Thanks for the info.

Good to know it uses so little power. I'm thinking of getting a "Zoom H5". In a lot of cases I'd have the Shotgun plugged into that. The Zoom is the only way I can do normal stereo sound, stereo shotgun and stereo Senn EK100 all at the same time (or best value on a low budget anyway).