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Author Topic: Tascam DR-70D 4-channel audio recorder for DSLR cameras  (Read 121298 times)

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Offline intpseeker

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #345 on: March 01, 2015, 06:21:12 PM »
First post I've seen concerning a mod for this device - https://www.gearslutz.com/board/10842631-post31.html

Wow! That post is from Jim Williams.

I inquired and Jim is not offering mods on this device at the moment.  He did say its an easy op amp swap.

Highly considering this mod  :coolguy: :coolguy:

I asked Busman if he would consider the mod. Haven"t heard back.
Mics:        Akg 451 eb A51's, ck-1's, ck-2's, ck 8's
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Pre:          ST-9100
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Recorders: ACM PMD660
                 Busman modded R-4
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Offline F.O.Bean

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #346 on: March 02, 2015, 02:47:50 AM »
First post I've seen concerning a mod for this device - https://www.gearslutz.com/board/10842631-post31.html

Wow! That post is from Jim Williams.

I inquired and Jim is not offering mods on this device at the moment.  He did say its an easy op amp swap.

Highly considering this mod  :coolguy: :coolguy:

I asked Busman if he would consider the mod. Haven"t heard back.

Nice!
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
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Offline Cheesecadet

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #347 on: March 02, 2015, 12:10:25 PM »
First post I've seen concerning a mod for this device - https://www.gearslutz.com/board/10842631-post31.html

Wow! That post is from Jim Williams.

I inquired and Jim is not offering mods on this device at the moment.  He did say its an easy op amp swap.

Highly considering this mod  :coolguy: :coolguy:

I asked Busman if he would consider the mod. Haven"t heard back.

Nice!

I will be recording one more show this weekend with the stock deck and then I will be doing this mod.  I will let you all know how it goes when it is done.  Seems to be a pretty difficult mod to complete because of the interior spacing of the components, not the basic chip replacement.  Jim Williams even told me it was risky.  You definitely don't want to be taking this down to your corner electronics guy to try it.  The right tools and a steady hand are a must or the unit will be fried.  Luckily I know someone who said they could do it for me.  Now just gotta buy the necessary components from Digi-key!   8)
« Last Edit: March 02, 2015, 12:55:40 PM by Cheesecadet »
AKG 481's, DPA 4061's (Matched), AT ES933's w/ AT853-ELE's (SC/C/O), ECM-19B's, MixPre-3, A10, M10 x 2, Hi Ho Silvers, Various Darktrain & GAKables

Vinyl:
Fluance RT83 Reference > MCS 3230 Receiver > Realistic MC-500's (NOS)

Upcoming:
02/10 J. Dilla
02/14 Wiliie Waldman & The Chocolate Factory
02/15 Gabe & Giz
02/16 GM5
02/28 Grace Potter

Offline 2manyrocks

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #348 on: March 02, 2015, 12:58:46 PM »
list of components and pictures of mod would be great if you can swing it.

Anybody have a head to head comparison of the stock 70d vs. any SD preamp or recorder?


Offline Cheesecadet

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #349 on: March 02, 2015, 01:14:46 PM »
list of components and pictures of mod would be great if you can swing it.

Anybody have a head to head comparison of the stock 70d vs. any SD preamp or recorder?

3 - SOIC National (TI) LME49720 Op Amps - Make sure LME's have decoupling caps from each power rail to ground to prevent oscillation

Will see about pics when the time comes not sure if possible or not as of now
« Last Edit: March 06, 2015, 11:03:47 AM by Cheesecadet »
AKG 481's, DPA 4061's (Matched), AT ES933's w/ AT853-ELE's (SC/C/O), ECM-19B's, MixPre-3, A10, M10 x 2, Hi Ho Silvers, Various Darktrain & GAKables

Vinyl:
Fluance RT83 Reference > MCS 3230 Receiver > Realistic MC-500's (NOS)

Upcoming:
02/10 J. Dilla
02/14 Wiliie Waldman & The Chocolate Factory
02/15 Gabe & Giz
02/16 GM5
02/28 Grace Potter

Offline refrain

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #350 on: March 04, 2015, 11:00:04 AM »
Hello,

Just received my Dr-70d two days ago, haven't had the time to test it, but the thing is really small, looks like a induced reduction of the SD 's and company... tested indoors on channels 1/2 with XLR stereo with MS decoding of a AKG set up (SE300 K91/94), and it works and sounds really nice (checked it on the computer with a pair of yamaha HD50), but I got the feeling of a very tiny sound on headphones output (low bass response, compared to what the spectogram/listenning showed on the computer)  the headphones are Sony MDR7506. Does anyone out there find something similar about the headphone output sound? I use this in a Zoom H4n and a Fostex FR2-Le (has a noisy headphone output) with much clear output and sound...


Mics: 2x Oktava MK-012 Card (XY, ORTF), AT BP4025 (STEREO XY), DIY Primo 172 48v matched stereo, Sony ECM 55B (Lav), DIY piezo mics
Audio Recorders: Sound Devices Mixpre6
Assorted audio acessories: Motu Ultralite MKIII, Echofire2 interface, Mackie 802 VLZ3 mixer, Rode Blimp II, sennheiser hd25
Audio Monitors: Yamaha HS7

Offline audBall

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #351 on: March 04, 2015, 11:22:36 AM »
RE: Mods to this thing

Can the opamps simply be hand-swapped out? (Kinda like the Beyer MV-100 could). Or is soldering necessary?

Can this be done to the DR-60D?
mg m20.21.23 ■ akg ck61.62.63 »  nbob■naiant »  aercomp2 ■ v2-3 ■ sx-m2d2
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Offline Cheesecadet

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #352 on: March 04, 2015, 01:42:16 PM »
RE: Mods to this thing

Can the opamps simply be hand-swapped out? (Kinda like the Beyer MV-100 could). Or is soldering necessary?

Can this be done to the DR-60D?

Surface mount soldered very tight
AKG 481's, DPA 4061's (Matched), AT ES933's w/ AT853-ELE's (SC/C/O), ECM-19B's, MixPre-3, A10, M10 x 2, Hi Ho Silvers, Various Darktrain & GAKables

Vinyl:
Fluance RT83 Reference > MCS 3230 Receiver > Realistic MC-500's (NOS)

Upcoming:
02/10 J. Dilla
02/14 Wiliie Waldman & The Chocolate Factory
02/15 Gabe & Giz
02/16 GM5
02/28 Grace Potter

Offline 2manyrocks

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #353 on: March 04, 2015, 06:01:28 PM »
I thought Busman offered a 60d mod, but given the $30 price difference between the 60d and the 60dmkii, I would think the 60d mod is a hard sale at the moment.  But at the price of a new 60dmkii, it's only about $100 more for the 70d, and about how much more does it cost to mod the 70D?

And does the 70d even need a mod?

I got lost in the posts about using a SD or Shure preamp with the 70d, but does the 70d even need a preamp?

Offline Ozpeter

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #354 on: March 04, 2015, 08:22:36 PM »
Quote
And does the 70d even need a mod?

I'm unaware of any real world before and after tests to support the need for any of these mods.  I know some people believe their devices are better modified - or they prefer them modified (in terms of a different, but not necessarily more accurate, sound) - but the chances of anyone listening to a recording you have made with a stock recorder and then suggesting that it would have sounded better modified, are pretty slim.

Offline fmw

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #355 on: March 04, 2015, 08:30:40 PM »
I recently got a DR-70D.  In a battery life test at home using 2250 mAh Philips NiMH AAs internally, with phantom power on running Neumann KM-140s I got 3 hours and 20 minutes run time, with some battery time used up in initial familiarization and setup. 

There a are number of settings that need to be changed from the default to record from external microphones.  Sometimes when I switch batteries the settings return to default and sometimes they don't.  I still haven't figured this one out, maybe it's a matter of how long the batteries are out. 

Taping a local band in a local bar, using the Neumann's and the DR-70D's phantom power, the sound turned out good - like I would have expected using my current PSP-3 and R09HR combo.  . 


Offline F.O.Bean

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #356 on: March 06, 2015, 03:22:24 AM »
I planned on getting one of these very soon, and had a few questions 8) First off, I was planning on using the EXT 1/2 input for my VMS02ib output, but was wondering if the upgraded chips compared to the 60d mkii would affect this input as well as the XLR inputs? The more I think about it, the more I doubt that the EXT 1/2 input has anywhere as good of chips and whatever else than the XLR inputs have?!?!?! So what I'm asking is, do I HAVE to run my inputs through all four XLR inputs to actually get any benefits of the upgraded chips compared to the 60d mkii ??? Or can I still run my vms02ib> Mini> EXT 1/2 and still get the benefits of the upgraded chips ??? I don't have a problem running all four xlr inputs, but it would be soo much easier and convenient to just use the EXT 1/2 mini input ;)

Or would you suggest me just getting a 60d mkii? I have been thinking about selling one of my m10s and buying a 70d, which would probably only cost about $150 out-of-pocket after the sale of the m10, which isn't bad at all IMO 8) But then I'd need another $80-$100 just for the cables Id need to run all four xlr inputs, that's why I want to run that EXT 1/2 input so badly ;)
Schoeps MK 4V & MK 41V ->
Schoeps 250|0 KCY's (x2) ->
Naiant +60v|Low Noise PFA's (x2) ->
DarkTrain Right Angle Stubby XLR's (x3) ->
Sound Devices MixPre-6 & MixPre-3

http://www.archive.org/bookmarks/diskobean
http://www.archive.org/bookmarks/Bean420
http://bt.etree.org/mytorrents.php
http://www.mediafire.com/folder/j9eu80jpuaubz/Recordings

Offline Cheesecadet

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #357 on: March 06, 2015, 09:07:02 AM »
To my knowledge the same chips are used for all inputs, and to be sure it has the 4580 op amps not the NE5532's like JM mentioned in his original post.  Maybe Tom from Tascam will chime in and let us know what this version is being said to have the NE5532's chipset but doesn't really contain it?   I should be getting my mod on this to the LMEs complete next week if all goes well.
« Last Edit: March 06, 2015, 11:02:42 AM by Cheesecadet »
AKG 481's, DPA 4061's (Matched), AT ES933's w/ AT853-ELE's (SC/C/O), ECM-19B's, MixPre-3, A10, M10 x 2, Hi Ho Silvers, Various Darktrain & GAKables

Vinyl:
Fluance RT83 Reference > MCS 3230 Receiver > Realistic MC-500's (NOS)

Upcoming:
02/10 J. Dilla
02/14 Wiliie Waldman & The Chocolate Factory
02/15 Gabe & Giz
02/16 GM5
02/28 Grace Potter

Offline 2manyrocks

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #358 on: March 06, 2015, 02:23:12 PM »
5532 is what is stated on Tascam's own website.  http://tascam.com/product/dr-70d/

If there is some other chip in these, then perhaps Jim Williams may be onto a MKii version we don't know about yet???

Puzzled...

Offline voltronic

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Re: Tascam DR-70D 4-channel audio recorder for DSLR cameras
« Reply #359 on: March 06, 2015, 02:48:57 PM »
You can see the 4850s in Cheesecadet's picture just to the right of the copper shield.  Strange that the website says 5532.  Could those be used somewhere else we're not seeing?

I asked Jim about the MKII over on GS, and he said it was listed on his NAMM literature but "no one knows about it yet".  To me it seems to be absolutely loony for Tascam to let on about a MKII so after the original has been released.
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