At 10:24 PM -0400 7/3/09, Richard L. Hess wrote:
>At 01:25 PM 2009-07-03, Rob Danielson wrote:
>
>>I've read some scary stories as well and this application would
>>demand a big pack. Even the NiMH cells are a big investment up front
>>and all of the Lion batteries I've tried acquire less dependable
>>output after 30 or so recharges even when I use a smart charger.
>
>This accessory allows the use of a common Camcorder battery (but not
>the same one as the 744) powering the recorder via the accessory holder.
>
><http://www.sounddevices.com/products/xlnphmaster.htm>http://www.sounddevi=
ces.com/products/xlnphmaster.htm
>
>Say you get six hours out of a big Blue Shape, so two of those would
>carry you through a 12 hour recording, with the external battery
>connected at the midpoint and at the end if you need to. Carrying two
>batteries for the external pack plus six rear-mount Li-ion Blueshapes
>at an average of one pound each (the Blueshapes are 0.67 pound) means
>that you should have enough power for three nights of recording in
>eight pounds--not 45. You do need to do one change overnight. I don't
>know the capacity of the batteries for the external pack, but if that
>would work with a large internal battery you might be able to do 12
>hours with one external and one internal battery per night and have
>it auto change over, but you've had trouble with that if I recall correctl=
y.
>
>I also don't know how far you are from your vehicle, but I can't
>imagine carrying a 45 pound AGM battery very far, especially at
>altitude. Quarter or half mile, yes, beyond that, no...also depends
>on how you carry it--I suspect you've got that figured out and aren't
>using a battery-carry strap that cuts your hands.
>
>>re:
>> ><<http://richardhess.com/notes/2009/04/13/zoom-h-2-line-input/>http://=
richardhess.com/notes/2009/04/13/zoom-h-2-line-input/>http:
>> //richardhess.com/notes/2009/04/13/zoom-h-2-line-input/
>>
>>Excellent. Very useful. Thanks for the reminder. I'll have to think
>>the implications through. Maybe I need to determine if the lowest
>>levels of night time presence are 10 dB or more above the noise floor
>>of the line input for in my rural location. There's plenty of gain to
>>work with the increased sensitivity. I'll probably make the
>>adjustments with the MP-2 pots for the quiet sounds I work with,..
>>Seems like -70 dBFS should be okay,...
>
>I don't know what type of dynamic range you're trying to capture, but
>the H2 is no where near as wide in that regard as the SD. If you go
>for the low-level material, then you might clip the odd jet passing
>over, but somehow I don't think you care <smile>.
>
>>Sounds like the material you obtained is helping with the adjustment
>>process. I have quite a few hours of my Dad on tape, but it didn't
>>occur to me to record the service. Wish I had! Being able to hear a
>>recording of the voice of someone who has passed is a wonderful human
>>development isn't it? Recorded voice almost seems to transcend media
>>in the ways humans can receive it. I made a video for my wife's Dad's
>>celebration service (also this year) and everyone was comfortable
>>with the video and stills and then "fell apart" when they heard his
>>(recorded) voice.
>
>Indeed, it is wonderful to be able to preserve these memories. I just
>finished editing the memorial service--it's one of those things I'm
>not sure one will listen to often, but it was helpful. With the piano
>at the beginning and end -- we had a 98-year-old professional pianist
>who did an excellent job.
>
>Anyway, I'm just thinking out loud. You already have a solution that
>works that you've paid for. I have been using single-cell 17670
>Li-ion cells in flashlights for 5.5 years--same two cells--and
>they've been recharged probably monthly, maybe more--and one is now
>showing, I think, a loss of capacity. I just bought four more and
>another charger that is better for the newer cells and am trying to
>get away from disposable 123A lithium cells except in the car flashlights.
>
>I've also bought some 14500 lithium cells (AA size) for a new pocket
>flashlight and I've had two Dell laptop Li-ion batteries for five
>years and the one I've used the most seems to have lost 30-40% of its
>capacity while the less-used one seems to have most of its capacity.
>I use the Dell every day to read email at various places around the house.
>
>So, overall, I'm impressed with Li-ion, but I don't think I'd invest
>in huge batteries as there is too much money in one place--the
>smaller, more common batteries seem more logical and less risk in many way=
s.
>
>Regards,
>
>Richard
>
>Richard L. Hess <richard%40richardhess.com>
>Aurora, Ontario, Canada
><http://www.richardhess.com/>http://www.richardhess.com/
>Detailed contact information:
><http://www.richardhess.com/tape/contact.htm>http://www.richardhess.com/ta=
pe/contact.htm
>
>
>
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