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Author Topic: Nak 300 batteries & voltage question  (Read 8427 times)

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Offline bugg100

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Nak 300 batteries & voltage question
« on: May 21, 2008, 04:50:22 PM »
What voltage should the Nak 300 and clones run well down to?  Anyone know?


Also what hearing aid batteries stack up to form the equivalent?

Thanks!
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Offline SmokinJoe

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Re: Nak 300 batteries & voltage question
« Reply #1 on: May 21, 2008, 10:20:02 PM »
9V is nominal.  Eveready 206 also know as A1611.
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Offline bugg100

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Re: Nak 300 batteries & voltage question
« Reply #2 on: May 22, 2008, 03:14:08 PM »
Yes, but what I want to know is at what voltage will the mic fail to work.
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Offline Patrick

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Re: Nak 300 batteries & voltage question
« Reply #3 on: May 22, 2008, 03:30:35 PM »
They will "work" at voltages down to 1.5v (and maybe even lower than that) but their output is distorted at moderate SPL's, and they become very, very noisy. 

I wouldn't recommend powering them with anything less then 9v.
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Offline SmokinJoe

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Re: Nak 300 batteries & voltage question
« Reply #4 on: May 22, 2008, 05:56:16 PM »
I see your question... I'm sorry.  I would say if they get around 7 to 8v it's time to buy new ones.  They last a long time, and I wouldn't want to get a distorted pull because I was trying to wring every last once of juice out of them.
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Offline bugg100

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Re: Nak 300 batteries & voltage question
« Reply #5 on: May 22, 2008, 06:06:33 PM »
Then my issue must be springs...  My batts are 8.09 and 8.51. And last time I taped (CA-14-9100 _tascam - UA-5) it turned into a shure sm81 comp instead....  Love that sound guy!

Guess I'll learn how to open up my mic4 now.  Thanks for the replies.

Joe
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Offline SmokinJoe

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Re: Nak 300 batteries & voltage question
« Reply #6 on: May 22, 2008, 06:48:07 PM »
If you got no signal, my guess is that the batteries are too far down in the body.  Those red Eveready's fit tight (as you know) and if you push them down too much before you screw the head on it won't make contact, and you will have no signal.  The trick is to push them in "just the right amount" so you can get the threads started, and while you are screwing on the head you have to compress the spring just a little.
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Offline bugg100

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Re: Nak 300 batteries & voltage question
« Reply #7 on: May 22, 2008, 06:55:48 PM »
Unfortunatly, thatks not my problem, as the batts aren't too far down.....  I'm not sure the spring is centered enough.
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Offline Roger Gustavsson

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Re: Nak 300 batteries & voltage question
« Reply #8 on: May 24, 2008, 03:40:34 PM »
Quote from: bugg100 on May 21, 2008, 04:50:22 PM

Also what hearing aid batteries stack up to form the equivalent?


Hearing aid batteries will not last very long. At least not as long as their rating in mAh let you believe. After you peel off the sealing tape, they will loose their capacity even without a load. You can use three 3V/125mAh Lithum CR1632 cells or six 1.5V/125mAh Alkaline LR44 in series (that is what I am using). You can also use two 3.6V/1200mAh Lithum size ½AA, will last very long! It is also possible to use two 4.8V/80mAh rechargeable NiMH batteries (size ½AA). I think it is adviceable to stay above 7V in order to keep distorsion down at higher levels.

Roger Gustavsson
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Re: Nak 300 batteries & voltage question
« Reply #9 on: May 24, 2008, 05:15:21 PM »
Quote from: SmokinJoe on May 21, 2008, 10:20:02 PM
9V is nominal.  Eveready 206 also know as A1611.

Anyone have the link for the Exell (Excel?) brand of 9V?

I posted it about 20 times in Nak threads - but they all seem to have dissappeared...?

Somehow I dont have it bookmarked, nor can I search it up...

I liked those the best - even though I think they had less mAh than the 206s
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Offline gdplusmore

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Re: Nak 300 batteries & voltage question
« Reply #10 on: May 24, 2008, 06:05:27 PM »
http://www.exellbattery.com/detail.asp?PID=A1611

I think this is the link you posted..
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NAK CM-300's  -> CP4's,CP-3's,CP2's,CP1's ->SonyD5
NAKCM-300's ->  CP4's,CP-3's,CP2's,CP1's ->MX-100-->NJB3
NAK CM-100's  -> CP4's,CP-3's,CP2's,CP1's ->SonyD5
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Re: Nak 300 batteries & voltage question
« Reply #11 on: May 24, 2008, 06:36:47 PM »
Quote from: gdplusmore on May 24, 2008, 06:05:27 PM
http://www.exellbattery.com/detail.asp?PID=A1611

I think this is the link you posted..

thank you - the spelling of "exell" always gets me...
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Offline heyitsmejess

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Re: Nak 300 batteries & voltage question
« Reply #12 on: May 24, 2008, 10:23:29 PM »
what i would like to know is this....

can you find/make a dummy cell to go in place of the battery that would allow it to be powered through other methods?

i dont mind (and actually like) running the full bodied naks, but hate paying 9 bucks for a battery.
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Re: Nak 300 batteries & voltage question
« Reply #13 on: May 25, 2008, 06:01:07 AM »
Quote from: heyitsmejess on May 24, 2008, 10:23:29 PM
what i would like to know is this....

can you find/make a dummy cell to go in place of the battery that would allow it to be powered through other methods?

i dont mind (and actually like) running the full bodied naks, but hate paying 9 bucks for a battery.

Not really - there are a variety of methods to make them phantom powered - but the thing is - they really only need 9V (even if you send them 48 - most of the mods step that down to the 10V range)

Just be sure to take the batteries OUT of the mics after every use - you should EASILY get a years worth of use out of them. (given an average tapers schedule)
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Offline Roger Gustavsson

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Re: Nak 300 batteries & voltage question
« Reply #14 on: May 25, 2008, 11:57:17 AM »
Looking at your equipment at the bottom of your message. Cannot the Church Audio 9100 preamp feed 9V to the CM-300? Of course, you will have to rewire them in order to do that, like the "active mod". If you use short cables, you can omit the output transformer and have 14dB more level (5 times) from you CM-300. You will still be on battery power ...

Batteries like Saft LS14250 (picture below) will last for about 1000 hours. You will need two in series for CM-300 or CM-100.

Roger
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