Hi Paul
Not having ever run my MixPre from an external battery before would I need to
use a fuse in the supply from the battery, or can you just plug it in?
Phil
----- Original Message ----
From: Paul Jacobson <>
To:
Sent: Wednesday, 28 November, 2007 10:42:38 PM
Subject: Re: [Nature Recordists] AT3032 and instability in Sound Devices MixPre
and 302, 442, MM-1, M
On 28/11/2007, at 11:16 PM, artsonics wrote:
> 4.Power the mixer from an external DC power supply....just great when
> yer miles from now where.
external dc power supply = battery pack _or_ ac adapter.
I'd personally prefer to carry extra weight in the form of a battery
pack, which would allow the mixer to perform as designed and give
extended run time, than to add a dedicated phantom supply.
>From the tech note it sounds like the source of the problem lies
with limitations using internal 2or3xAA cells to power the SD mixers.
Using an external 12VDC power supply should result in less
sensitivity to current fluctuations. The easy way to test this would
be to check how the mixer performs with the AT3032's while powering
the SD mixer from wall power adapter. Running off an external battery
pack should give similar performance to the wall adapter as it should
remove at least one stage of voltage boost from the power supply and
reduce sensitivity to current fluctuations. According to the SD web
site their mixers can run from 5-18VDC external so there is a wide
range of battery packs that would work.
I'd suggest looking at a 7.2V tamiya type pack as a minimum or
alternatively a12V Li-Ion pack.. You'd also need an adapter cable to
run either of these packs into the hirose plug on the SD mixers.
cheers
Paul
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