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Re: Rolls PB224 power options

Subject: Re: Rolls PB224 power options
From: "Rob Danielson" danielson_rob
Date: Sat Jul 1, 2006 1:50 pm (PDT)
Hi Debbi--
Sorry about the missed mock. I can reliably record a 93 minute 1GB
disk on two "9 volt" NiMH batteries rated at 160 mAh powering to
NT1-A's. Duracell  MN-1604 Alkaline 9 volt batteries are rated at 550
mAh, so you should be able to get over 4 hours of continuous
operation out of these. The NiMH are 8.4 volts not 9 volts though,
which lowers their performance.

I just hate throwing away batteries after one use.

Here are some rechargeable LiON 9 batteries rated at 400mAH
and the Charger for charging one at a time:

For the 7+ hour recordings I most often make, I'm using the 12 volt
external power input (uses Radio Shack Type M plug) and a battery
"sled" that can run the Rolls for days.
(thats my over-kill battery sled)
  Note the polarity on the Rolls and Art connector is non-standard,
negative center.

For you, a sled of 10 X 1.2 volt AA size 2500mAH NiMH batteries
should provide plenty of power for a day's recording, even if left on
all the time.

Here are some sample deals on AA NiMH bats, holders and chargers:

24-AA's for two, complete 12volt packs:

You'd need AA battery 2-sleds to hold the 10 cells:
(doube for two sled)

I'd get a charger designed to charge the whole 12 volt sled at once
so you don't have to dismantle the sleds to charge them.

Its burned into my head: "No such thing as too much power or tape."
But I still run out, often.
Please report back on your solution!
Rob D.

=3D =3D =3D =3D =3D

At 11:45 AM -0700 7/1/06, Debbi B wrote:
>It seems like the 9v batteries in my power supply (used with Rode
>NT-1A) don't last very long. I used it to record maybe half an hour
>worth of actual recording, not including on pause, which was probably
>30-60 minutes if that. Previous to this either I've forgotten to turn
>off the power supply or the switch got turned on in my bag. This time
>I made sure to turn it off.
>Is this within the normal range one would expect batteries to last?
>(Of course, just when I want to use it, I don't have any extra
>batteries. The neighborhood Mockingbird has been including "meow"s in
>its repertoire.)

Rob Danielson
Peck School of the Arts
University of Wisconsin-Milwaukee

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