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Author Topic: Tascam DR-70D - modification discussion  (Read 27565 times)

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Offline illconditioned

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Re: Tascam DR-70D - modification discussion
« Reply #135 on: February 02, 2018, 06:06:47 PM »
LOL.
That would be me a few years ago.

Since then I've reduced my hacking.
Have not reduced gear acquisition though ...


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Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #136 on: February 03, 2018, 01:33:40 AM »
Since then I've reduced my hacking.

WHAT?? And, like, use equipment the way they came out of the box? That's INCONCEIVABLE!!!  ;D ;D ;D

Hacking is love. Hacking is life.  :headphones:

Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #137 on: February 03, 2018, 09:19:52 PM »
Did a quick test, 4 channels recording (all xlr/trs and one channel with phantom power). lcd light always on.

filled a 32gb card (15 hours and 23 minutes, 48khz/24bit) and still have some battery left   :o :o

so, that's a win in my book  :cheers:


Offline morst

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Re: Tascam DR-70D - modification discussion
« Reply #138 on: February 03, 2018, 11:43:47 PM »
Malow, looks like you replaced the Remote connector with a power charging adaptor maybe?

And removed the "camera in" jack to make space for the second RCA?
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Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #139 on: February 03, 2018, 11:50:44 PM »
Malow, looks like you replaced the Remote connector with a power charging adaptor maybe?

And removed the "camera in" jack to make space for the second RCA?
yes, replaced the "remote" with a connector to charge internal li-ion batteries.

and removed "line out" and "camera in" to RCA line out only ("camera in" is not needed for me)

changing the subject, after a few power measurements, I discovered that the recorder does not "shut off" power to the preamps when a channel is set not to record

What this mean is, the channels set NOT TO RECORD still have power delivered to them

So, If you set to record only channel 1 and 2, and the 3 and 4 are set to xlr/trs, it will consume 20% more power from the batteries than if you set 3 and 4 to MIC

Same thing if you set to record 3 and 4 to MIC and disable 1 and 2. If you set 1 and 2 to xlr/trs, it will consume 20% more power than if you set to ext_stereo

so, you can get 20% more battery for free depending on how you use ;)
« Last Edit: February 04, 2018, 01:59:11 AM by malow »

Offline morst

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Re: Tascam DR-70D - modification discussion
« Reply #140 on: February 05, 2018, 12:20:31 AM »
changing the subject, after a few power measurements, I discovered that the recorder does not "shut off" power to the preamps when a channel is set not to record

What this mean is, the channels set NOT TO RECORD still have power delivered to them

So, If you set to record only channel 1 and 2, and the 3 and 4 are set to xlr/trs, it will consume 20% more power from the batteries than if you set 3 and 4 to MIC

Same thing if you set to record 3 and 4 to MIC and disable 1 and 2. If you set 1 and 2 to xlr/trs, it will consume 20% more power than if you set to ext_stereo

so, you can get 20% more battery for free depending on how you use ;)
WOW! Great discovery!  :D
I assume this would apply to power use off a USB connection if that's where power was coming from? So not just a battery savings, but longer run times on the USB power as well?

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Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #141 on: February 05, 2018, 05:59:24 AM »
My tests where with internal batteries, not USB. But I believe the working principle is the same independent of source power. So, the same applies to USB power. Less consumption, longer run-times :)
« Last Edit: February 05, 2018, 07:16:01 AM by malow »

Offline morst

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Re: Tascam DR-70D - modification discussion
« Reply #142 on: February 05, 2018, 08:05:04 PM »
My tests where with internal batteries, not USB. But I believe the working principle is the same independent of source power. So, the same applies to USB power. Less consumption, longer run-times :)
That is my assumption as well. Why would choice of power source affect that?
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Offline voltronic

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Re: Tascam DR-70D - modification discussion
« Reply #143 on: February 06, 2018, 06:23:23 AM »
Malow, looks like you replaced the Remote connector with a power charging adaptor maybe?

And removed the "camera in" jack to make space for the second RCA?
yes, replaced the "remote" with a connector to charge internal li-ion batteries.

and removed "line out" and "camera in" to RCA line out only ("camera in" is not needed for me)

changing the subject, after a few power measurements, I discovered that the recorder does not "shut off" power to the preamps when a channel is set not to record

What this mean is, the channels set NOT TO RECORD still have power delivered to them

So, If you set to record only channel 1 and 2, and the 3 and 4 are set to xlr/trs, it will consume 20% more power from the batteries than if you set 3 and 4 to MIC

Same thing if you set to record 3 and 4 to MIC and disable 1 and 2. If you set 1 and 2 to xlr/trs, it will consume 20% more power than if you set to ext_stereo

so, you can get 20% more battery for free depending on how you use ;)

Just to be clear, are you finding this is the case even if phantom power is disabled for the non-armed tracks?  (As in, set to MIC instead of MIC+PHANTOM)
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Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #144 on: February 06, 2018, 06:50:59 AM »
Just to be clear, are you finding this is the case even if phantom power is disabled for the non-armed tracks?  (As in, set to MIC instead of MIC+PHANTOM)
yes. tested again now just to make sure.

EDIT: now with a removable backup recorder. cause, why not? ;)

(using power from dr-70 internal batteries, and i added a line-out 3.5mm plug inside the front cover)
« Last Edit: February 06, 2018, 01:06:51 PM by malow »

Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #145 on: February 13, 2018, 01:51:44 AM »
After realizing that recover files from the card if any problem happens are almost impossible, i decided to put the backup recorder fixed on the DR-70D.

very happy with this device. the only thing that bugs me is that the right build-in mic is a bit louder than the left. to match them i have to set one lower than the other :(


Offline malow

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Re: Tascam DR-70D - modification discussion
« Reply #146 on: February 18, 2018, 11:22:38 AM »
ok, last modification i think... added one AA battery inside for the backup recorder (instead of using li-ion from recorder), made a new front cover with connectors and a cut-out for direct SD card access. i think it's enough for now ;)



« Last Edit: February 18, 2018, 11:25:53 AM by malow »

Offline Neilyboy

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Re: Tascam DR-70D - modification discussion
« Reply #147 on: March 17, 2018, 07:23:38 AM »
Impressive mods man!. Love the internal battery modification!
Neil
Mic's: AKG C214's, Line Audio CM3, AT4041SP, AT853 (C, SC, O), AT943 (C, H)
Pre's: Sound Devices MixPre 2
Rec's: Sony PCM-M10, Edirol R-44, Tascam DR60D MKii, Tascam DR70D x 2

 

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