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Author Topic: Nakamichi cm300 JB mod: how many hours with a single 9v battery?  (Read 210 times)

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Offline PaulCayard

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Hi, I've recently catch a couple of Nakamichi cm300 JB mod. They are terminated with a 3.5mm mini jack that I plug in a ca9200 or a ca battery box.
I usually tape with at853>ca9200/bbox and I use a single (not rechargeable) 9v battery for two shows (about 6 hours).
Can I use a 9v battery for two shows also with nak cm-300? Or is it safer using a fresh 9v battery for each show?
Thanks for any suggestion (eventually suggestion for excellent 9v rechargeable battery tested on the field with nak cm-300/at853>ca9200/ca-bbox)
« Last Edit: July 10, 2018, 04:11:54 AM by PaulCayard »
Mics: Nakamichi CM-300 JB mod (CP-1), AT853 4.7k mod (SC/C/H), AT U853 4.7k mod (C/H)
Pre-amp/Power: CA-9200, CA-9100, CA-UBB
Recorder: Roland R-07, Sony M10, Tascam DR-2d (x2), Roland R-05

Offline kuba e

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Re: Nakamichi cm300 JB mod: how many hours with a single 9v battery?
« Reply #1 on: July 12, 2018, 10:21:49 AM »
Naks current consumption is less than 1 mA. Probably At853 or Ca11 have very similar current consumption too.

Battery box: I use a 9V rechargeable battery that has a capacity of 200 mAh. So two Naks can theoretically last up to 100 hours of operation.
CA9200: see https://taperssection.com/index.php?topic=165651.0
« Last Edit: July 12, 2018, 10:25:15 AM by kuba e »

Offline robeti

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Re: Nakamichi cm300 JB mod: how many hours with a single 9v battery?
« Reply #2 on: July 12, 2018, 05:08:50 PM »
Thanks for any suggestion (eventually suggestion for excellent 9v rechargeable battery tested on the field with nak cm-300/at853>ca9200/ca-bbox)


I always used this set as well as the at-853's with a ca-ubb / ca-9200 plus Imedion (the black and grey powerex) true 9.6v batteries

Perfect results all the time.
 
mics: nakamichi cm-50 | nakamichi cm-300 (JB mod/cp1/cp2/cp3) | primo em4052pmi4 | sp-cmc-4u/at-u853a 4.7k mod (h/c/sc)
power: ca-ubb | ca-9200
recorder: roland r-05
video: panasonic hdc-sd600 | panasonic hdc-700 | sony hx9v | sony hx50v

Offline PaulCayard

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Re: Nakamichi cm300 JB mod: how many hours with a single 9v battery?
« Reply #3 on: July 12, 2018, 05:26:22 PM »
Kuba e, Robeti, thanks a lot for your suggestion.
I'm very interested in Imedion 9.6V 230mAh, it's the battery that I was looking for!!
Mics: Nakamichi CM-300 JB mod (CP-1), AT853 4.7k mod (SC/C/H), AT U853 4.7k mod (C/H)
Pre-amp/Power: CA-9200, CA-9100, CA-UBB
Recorder: Roland R-07, Sony M10, Tascam DR-2d (x2), Roland R-05

 

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