UPSs and Digibetas

[Bryce Whiteside]

As long as the electrical service is on you may be okay. I would think you would need a 1500VA minimum just for the VTR. You need to see how many watts the Digibeta needs.

Another consideration is some of these UPS’s put out 60hz square wave when on the battery as oppose to sinusoidal 60hz. If you go to the UPS in a power failure you would be able to eject the tape. Trying to work during a power failure would be foolish. A UPS is only for elegantly shutting down you equipment during a power failure.

A well conditioned AC circuit properly grounded with surge suppression may be all you need. But, you will have to wait to get your tape out of the VTR when the power comes back on.

Cautious,
Bryce

Don’t worry Mr. B. I have a cunning plan…

PowerBook 1.67 Ghz ATI 9700 128 MB 2 GB
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[Bouncing Account needs new email address]

[klthomas] “I’m wondering if the large torque motors for reel takeup would cause instantaneous power draw problems, say too much current draw when hitting rewind ect.”

Don’t wonder too hard about this. 😉

A pro VCR is not a table saw.
The motors are electronically controlled and ramped-up, and powered from an internal voltage supply (NOT capacitor-started and NOT directly-connected to the AC power like power tools and air conditioning compressors.)

As was stated, just look at the power consumption number on the rear plate.
This should be the “worst-case” consumption if only one number is given.

The square-wave issue may not be bothersome.
These units have very good filtering as they are built for world-wide use, sometimes under some pretty poor power-source conditions.
Still, if you want to be cautious (always a good idea), just eject the tape and then shut off the recorder when under a power-failure condition.

[Walter Biscardi]

I run all my A/V equipment on Furman Power Conditioners. In some cases they’re cheaper than a UPS. I highly recommend them and you can pick them up at a local Guitar Center (or most other musical equipment store) or on the web at http://www.markertek.com

Walter Biscardi, Jr.
Creative Genius, Biscardi Creative Media
https://www.biscardicreative.com

Now in Production, “The Rough Cut,” https://www.theroughcutmovie.com

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Peter Wiggins]

FYI

I’ve always been told that digibetas momentarily draw a large current on powerup.

As my electrician friend is wiring up my house this week, (X10 & Indigo if you are interested) maybe I’ll get him to put his multimeter across my digi and find out!

Peter

https://www.peterwiggins.com

Currently conforming the feature “Black Sun”

[Kevlareditor]

Thanks for the help guys. Peter, yeah I’d love to know if you can swing that. In chacking the manual for the DVW-2000, It states this.

For customers in the U.S.A. and Canada:
1Power cord 125 V 10 A (2.4 m): ! 1-557-377-11
2Plug holder (Brown): 3-613-640-01
Power voltage: AC 100 to 240 V

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[klthomas] “So 240w max, 20 amps”

Well, no, not 20 Amps. (The POWER CORD is only rated to 10 Amps.)

If you are in the US, assume approx. 125 VAC 60 Hz as your wall outlet power source.

So, 20 amps at 125 volts AC would be 2500 watts! (That’s about the power drawn by four or five standard Colortran stand lights, and you know how HOT those would be.)

Actually, 240 watts at 125 volts AC would be about (under, actually) 2.0 (two) Amps (which is about right for modern electronics with motors and lots of circuitry.)

As I indicated earlier, the VERY WIDE range of voltage and AC frequencies that are acceptable to the unit mean it can operate under some pretty “odd” power conditions. I think the UPS you linked to looks just fine.

Just for info purposes, “Watts Law” is actually very simple. If you know TWO of the values, you can compute the THIRD.
Watts = Volts x (multiplied by) Amps
Amps = Watts / (divided by) Volts
Volts = Watts / (divided by) Amps