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soundtrane

EXT Powering for MixPre3/6

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External Powering option for Mixpre-3 and Mixpre-6

* Locking DC connector 
* Can take up to 17V DC input (meaning Li-Ion at full capacity)
* Can use AA batteries despite the modification - if necessary when external powering is not possible.

As of now - cannot put in EXT PWR with AA batteries in the sled both at once -until i find a way to isolate the direct physical connection between the sled and the recorder... 

-vin

 

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That looks like a neat solution!

Would you mind sharing some info on the internals of your box, for example what converter did you use?

 

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On 25/06/2017 at 7:11 PM, soundtrane said:

External Powering option for Mixpre-3 and Mixpre-6

* Locking DC connector 
* Can take up to 17V DC input (meaning Li-Ion at full capacity)
* Can use AA batteries despite the modification - if necessary when external powering is not possible.

As of now - cannot put in EXT PWR with AA batteries in the sled both at once -until i find a way to isolate the direct physical connection between the sled and the recorder... 

-vin

 

IMG_3741.JPG

IMG_3742.JPG

IMG_3744.JPG

IMG_3745.JPG

IMG_3746.JPG

Vin, this looks great. Re isolation: Is this because even if the 2 power sources are wired in parallel the external source would give the AAs a problem?

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On 7/13/2017 at 6:26 PM, daniel said:

Vin, this looks great. Re isolation: Is this because even if the 2 power sources are wired in parallel the external source would give the AAs a problem?

yes, since the external input will try to 'charge' the batteries. :) there is no way to isolate the AA batteries from the recorder physically. if there is any other way, i have not yet looked into it. 

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...if you put a piece of plastic between two battery you open the chain... and you can leave the battery inside ready to be used if you loose the external energy.

In add you should cut the external power with a switcher, oterways the regulator remain in parallel at the battery and you can loose energy.

 

 

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