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Author Topic: MixPre -- stuck battery -- ??  (Read 6440 times)

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Offline F.O.Bean

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Re: MixPre -- stuck battery -- ??
« Reply #15 on: May 07, 2012, 09:09:29 PM »
I would try the superglue to a pen/rod/etc method first :)
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runonce

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Re: MixPre -- stuck battery -- ??
« Reply #16 on: May 07, 2012, 09:18:41 PM »
could you force a little strip of duct tape down in the compartment and jerk it out...(not sure how stuck is stuck)?

Offline heehaw

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Re: MixPre -- stuck battery -- ??
« Reply #17 on: May 08, 2012, 07:17:55 AM »
Unfortunately, superglue and duct tape didnt solve this problem. However, Ni-Mh Battery is hanging around in the tube.
Maybe to try a vacuum cleaner? To suck out this trash from the Mixpre?
How it's looking:

2 x mkh40 > mixpre-d > m10

runonce

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Re: MixPre -- stuck battery -- ??
« Reply #18 on: May 08, 2012, 07:24:07 AM »
Unfortunately, superglue and duct tape didnt solve this problem. However, Ni-Mh Battery is hanging around in the tube.
Maybe to try a vacuum cleaner? To suck out this trash from the Mixpre?
How it's looking:


Wow - must be pretty snug - get out the drill!

A small hole - and thread a 3 inch drywall screw and pull...

Offline heehaw

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Re: MixPre -- stuck battery -- ??
« Reply #19 on: May 08, 2012, 06:14:19 PM »
get out the drill!
That's what I'm thought about just after my previous post. And I've did it! For now my Mixpre-D internally FREE! Anyway, thanks for all your advice, guys! Now I'm looking for reliable Ni-Mh, have heard very good reviews about Sanyo Eneloops. Any users here with Eneloops and Mixpre?
Also, to save others from a similar problem, I need to mention that the Ni-Mh battery that stuck in Mixpre is GP 2500. It's get hot in Mixpre and plastic that covers battery start to flake off and caused problem I think. I don't know for shure why this happens because I've used this battery many times in Sennheiser Evolution G3 transmitter without problems.
And final pics for fun

2 x mkh40 > mixpre-d > m10

Offline bryonsos

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Re: MixPre -- stuck battery -- ??
« Reply #20 on: May 08, 2012, 06:20:33 PM »
I use Eneloops in my MixPre and they've worked flawlessly.
Mics: 3 Zigma Chi HA-FX (COL-251, c, h, o-d, o-f) / Avenson STO-2 / Countryman B3s
Pres: CA-Ugly / Naiant Tinyhead / SD MixPre
Decks: Roland R-44 / Sony PCM-M10
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Offline F.O.Bean

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Re: MixPre -- stuck battery -- ??
« Reply #21 on: May 08, 2012, 07:24:38 PM »
I use Energizer 2300mah AA's and have worked great for me thus far :)
Recording Gear:
Schoeps MK 4 (MP) & MK 41v (MP) Capsules ->
Schoeps 250/0 KCY's X2 ->
Naiant +60v/Low Noise PFA's x2 ->
DarkTrain Right Angle Stubby XLR's x2 ->
Sound Devices MixPre-6 & MixPre-3 ->
SanDisk 128gb Extreme Pro & 64gb Ultra Plus SDXC-I

Portable Playback Gear:
Campfire Audio Andromeda & Dorado IEM's ->
Linum G2 SuperBax & Bax {3.5mm} | FiiO LC 2.5c {2.5mm} ->
Shanling Audio M5s | Sony NW-A35 DAP's

DAW:
Dell Inspiron 15 5570-5521 Laptop
(Pentium i5/8gb RAM/256gb SSD)

http://www.archive.org/bookmarks/diskobean | http://www.archive.org/bookmarks/Bean420 | http://bt.etree.org/mytorrents.php

Offline kleiner Rainer

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Re: MixPre -- stuck battery -- ??
« Reply #22 on: May 12, 2012, 05:17:07 AM »
Hi all,

I had problems with rechargeable AA cells not fitting into battery holders. After close inspection, I found out the following:

IEC and ANSI standards specify a cell diameter of 13.5 to 14.5 mm for AA.
See http://data.energizer.com/PDFs/E91.pdf

Some rechargeable cells, especially the ones with the highest capacity, are at the upper limit of this diameter to get maximum capacity, and the outer shell is also thinner (= more volume for active material).
This means that pressure in the cell will expand the cell in diameter, which can lead to a stuck cell. Cells expand when they get hot. It is also possible that they get distorted when they are dropped, so that they are more oval than round. There is also the possibility that the shrink wrap around the cell has thickness tolerances beyond 14.5mm.

In my case, its a LED flashlight that is finicky about cell diameter. There is a sticker inside the battery tube that reduces the internal diameter to just below 14.5mm, so I have a battery set assigned to it that fits without problems. Maybe the designer was not aware of the extra safety sticker...

The alkaline AAs I had on hand (Duracell and some noname brands) all measure to about 14-14.2mm diameter.

My MixPre D accepts Kodak AA rechargeables with a cell diameter of 14.4mm with enough sideplay so that even hot cells should slide out without problems.

My recommendation: If a cold cell is a tight fit or if you have to force it into the battery holder tube (like on the MixPre or many flashlights) - dont use it. Look for cells that give some sideplay - they get thicker when warm or when they age.


Greetings,

Rainer
recording steam trains since 1985

Offline heehaw

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Re: MixPre -- stuck battery -- ??
« Reply #23 on: May 13, 2012, 09:11:35 AM »
Thanks for info, very simple and useful.
Recently I've test Ansmann 2850 with my Mixpre-D. It fits with enough space and works great.
But I'm thinking to buy Eneloops.
2 x mkh40 > mixpre-d > m10

 

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