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Author Topic: TASCAM DR-680 portable 8-track #4  (Read 57835 times)

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kirk97132

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TASCAM DR-680 portable 8-track #4
« on: August 06, 2011, 01:14:40 PM »
Previous thread part 3: http://taperssection.com/index.php?topic=141730.0
part 2: http://taperssection.com/index.php?topic=137231.360
part 1: http://taperssection.com/index.php?topic=131128.0


Picking up where we left off............
Extrnal battery solutions for the 680.  Here's a question, has anyone evered check the phantom voltage using a 9 volt dvd battery? 
« Last Edit: August 06, 2011, 01:17:38 PM by kirkd »

Offline Chuck

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Re: TASCAM DR-680 portable 8-track #4
« Reply #1 on: August 06, 2011, 03:27:43 PM »
I just had to send my second DR-680 back to Tascam/TEAC, because I was getting that cyclical volume going up and down that some users have reported with this recorder.

If anyone has more information about that problem, I'd like to hear about it. About 47 minutes into running with a pair of C-481's and a pair of CAD GXL1200's the GXL1200's levels started to go up and down in a cyclical way. I had those mics on tracks 1 & 2.  Looking at the WAV forms in CuBase, I can see that the levels on the C-481's went down about 3dB when the CAD mics started going into the cyclical volume thing too. The SBD feed I had on tracks 5 & 6 was unaffected.

I'm thinking it's a phantom power supply problem...


Reality is merely an illusion, albeit a very persistent one.

Microphones: (2) Microtech Gefell M300, (2) AKG C 480 B comb-ULS/ CK 61/ CK 63, (2) CAD GXL1200 (cardioid and sub-cardioid capsule & electronics mod), (2) Audix M1290-o, (2) Micro capsule active cables w/ Naiant PFA's, (2) Naiant MSH-1O, (2) Naiant AKG Active cables, (2) Church CA-11 (cardioid), (2) CAD C9, (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Tascam DR-680, iRiver iHP-120 (Rockboxed & RTC mod), Denon DTR-80p

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

kirk97132

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Re: TASCAM DR-680 portable 8-track #4
« Reply #2 on: August 06, 2011, 04:10:04 PM »
How were you powering it?  This is kinda why I was asking about the DVD battery supplying an actual 48 volts phantom.   

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Re: TASCAM DR-680 portable 8-track #4
« Reply #3 on: August 06, 2011, 06:27:14 PM »
9v "DVD" battery. But, it also had 8 fully charged NiMH AA's internally.
Reality is merely an illusion, albeit a very persistent one.

Microphones: (2) Microtech Gefell M300, (2) AKG C 480 B comb-ULS/ CK 61/ CK 63, (2) CAD GXL1200 (cardioid and sub-cardioid capsule & electronics mod), (2) Audix M1290-o, (2) Micro capsule active cables w/ Naiant PFA's, (2) Naiant MSH-1O, (2) Naiant AKG Active cables, (2) Church CA-11 (cardioid), (2) CAD C9, (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Tascam DR-680, iRiver iHP-120 (Rockboxed & RTC mod), Denon DTR-80p

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

Offline jbell

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Re: TASCAM DR-680 portable 8-track #4
« Reply #4 on: August 06, 2011, 08:18:09 PM »
That's a bummer your second one is acting up too!!

I just had to send my second DR-680 back to Tascam/TEAC, because I was getting that cyclical volume going up and down that some users have reported with this recorder.

If anyone has more information about that problem, I'd like to hear about it. About 47 minutes into running with a pair of C-481's and a pair of CAD GXL1200's the GXL1200's levels started to go up and down in a cyclical way. I had those mics on tracks 1 & 2.  Looking at the WAV forms in CuBase, I can see that the levels on the C-481's went down about 3dB when the CAD mics started going into the cyclical volume thing too. The SBD feed I had on tracks 5 & 6 was unaffected.

I'm thinking it's a phantom power supply problem...
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Offline phil_er_up

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Re: TASCAM DR-680 portable 8-track #4
« Reply #5 on: August 07, 2011, 08:17:57 AM »
That's a bummer your second one is acting up too!!

I just had to send my second DR-680 back to Tascam/TEAC, because I was getting that cyclical volume going up and down that some users have reported with this recorder.

If anyone has more information about that problem, I'd like to hear about it. About 47 minutes into running with a pair of C-481's and a pair of CAD GXL1200's the GXL1200's levels started to go up and down in a cyclical way. I had those mics on tracks 1 & 2.  Looking at the WAV forms in CuBase, I can see that the levels on the C-481's went down about 3dB when the CAD mics started going into the cyclical volume thing too. The SBD feed I had on tracks 5 & 6 was unaffected.

I'm thinking it's a phantom power supply problem...
Sorry to hear that chuck!
Everyday is a gift. Enjoy each one!
Forward motion bring positive results.

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Re: TASCAM DR-680 portable 8-track #4
« Reply #6 on: August 07, 2011, 09:55:02 AM »
Bummer Chuck.

I'm wondering if people are having issues by only feeding it 9V? Maybe it's enough to make it functional, but if the battery starts to flake out it pushes the DR-680 into lala land. Or maybe it could be mic dependent...ie mics that draw more power might cause trouble, and mics that draw less might be fine with 9V.

Just thinking out loud. I don't really know much about this stuff. Just enough to be dangerous.

Speaking of batteries. Which tip should I use for the Tekkeon MP3450? Cashed in my bucket of change and had enough to splurge for one of those. :) ...maiden voyage of the deck with external battery on Saturday. I'm going to try to run more than 3 channels for the first time. I'm thinking 2x Mics + Mono SBD feed + 3 individual vocal mics out of the board.
-24      -12              -6             0       OVER
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|||||||||||||||||||||||||||| []

||| MICS:  Beyer CK930 ~ Nevaton MCE400 ~ Countryman B3 |||
||| CABLES: Kind Kables |||
||| PREAMPS: Naiant Tinybox | Naiant Littlebox | Naiant IPA | Church BB |||
||| DECKS: Sound Devices MixPre6 | Sony M10 |||
||| PLAYBACK: Outlaw Audio RR2150 > Epos ELS8 |||
||| PHOTO: Sony a6000 | Sony 16-50 | Sony 55-210 | Rokinon 14mm | Rokinon 8mm |||
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Offline Gutbucket

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Re: TASCAM DR-680 portable 8-track #4
« Reply #7 on: August 08, 2011, 09:17:38 AM »
[answers roll call]

I'm using 9V DVD + internals.  No issues so far, probably the biggest phantom draw for me would have been for 6 channels: 2x AKD TL + 4x phantom power adaptors.  I have not checked voltage or current draw.  Sorry to hear about the troubles, Chuck.

Did a cool 5 omni decca-tree surround recording a little over a week back for an outdoor show.  About 40" between mics.  Full siren firetruck passby about 3/4 of the way through is pretty impressive.  Irony of the thing is that I setup the mics in a small tree growing directly in front of the mobile stage, 3rd row a couple seats left of center, so in this case it was indeed real decca TREE.
volition > vibrations > voltages > numeric values | numeric values > voltages > vibrations> virtual teleportation time-machine experience
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Offline Sockan

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Re: TASCAM DR-680 portable 8-track #4
« Reply #8 on: August 08, 2011, 05:46:42 PM »
I might have mentioned this in a previous post a while ago, but since you are talking about external batteries...
I have tried a couple of the "tri.voltage" (5v USB, 9v, 12v) versions of the 6800mAh batteries. In a duration test with 3 mics using phantom power, I tested one of them over night and it where still going after 7.5 h when I disconnected it because i needed it recharged for use after work (they charge really slow). There is one problem with both of mine because they create tones every 4000hz... It's on 4, 8, 12, 16 and 20khz.
I don't even have to have it connected to dr-680. The tones get recorded if it's in the same bag or close to dr-680. I usually go around that by having the recorder on my left hip and the battery on my right hip in a bag in my belt with a cable to dr-680.
I got tired of that so I have ordered 2 (and just got them) 9800mAh versions with only 12v and they don't have those tones. I haven't tested duration and quality yet, but no annoying tones so far...
You can find them here. http://cgi.ebay.com/12V-DC-Rechargeable-Li-ion-Battery-CCTV-Cam-9800mAh-/250671005591?pt=LH_DefaultDomain_0&hash=item3a5d27ff97#ht_3039wt_1114
How long "should" a 9800mAh battery last with 4 channels with phantom power?
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Offline headroom

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Re: TASCAM DR-680 portable 8-track #4
« Reply #9 on: August 10, 2011, 08:07:00 AM »
The TASCAM eats approx 340- 400 mA at 12Volt 9800mA : 400mA =  24 Hrs

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Re: TASCAM DR-680 portable 8-track #4
« Reply #10 on: August 13, 2011, 12:54:05 PM »
For anyone that is interested, here is a link to a recording that exhibits the cyclical volume swings on my DR-680:

CyclicalProblem.zip

http://www.filesavr.com/xzhoOJOW
Reality is merely an illusion, albeit a very persistent one.

Microphones: (2) Microtech Gefell M300, (2) AKG C 480 B comb-ULS/ CK 61/ CK 63, (2) CAD GXL1200 (cardioid and sub-cardioid capsule & electronics mod), (2) Audix M1290-o, (2) Micro capsule active cables w/ Naiant PFA's, (2) Naiant MSH-1O, (2) Naiant AKG Active cables, (2) Church CA-11 (cardioid), (2) CAD C9, (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Tascam DR-680, iRiver iHP-120 (Rockboxed & RTC mod), Denon DTR-80p

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

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Re: TASCAM DR-680 portable 8-track #4
« Reply #11 on: August 13, 2011, 01:05:52 PM »
thats fucked.   I *was* going to buy one of these.
LMA recordings and what-not


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Offline phil_er_up

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Re: TASCAM DR-680 portable 8-track #4
« Reply #12 on: August 13, 2011, 03:50:19 PM »
For anyone that is interested, here is a link to a recording that exhibits the cyclical volume swings on my DR-680:

CyclicalProblem.zip

http://www.filesavr.com/xzhoOJOW

Thanks Chuck. I DL'ed and have never seen that behavior on my Dr-680 that I can tell, but that is messed up.
Everyday is a gift. Enjoy each one!
Forward motion bring positive results.

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Re: TASCAM DR-680 portable 8-track #4
« Reply #13 on: August 13, 2011, 03:56:10 PM »
For anyone that is interested, here is a link to a recording that exhibits the cyclical volume swings on my DR-680:

CyclicalProblem.zip

http://www.filesavr.com/xzhoOJOW

What sort of file is this? It says it's a zip, but it downloads a jpg file for me (which doesn't open).
-24      -12              -6             0       OVER
||||||||||||||||||||||||||| []  
|||||||||||||||||||||||||||| []

||| MICS:  Beyer CK930 ~ Nevaton MCE400 ~ Countryman B3 |||
||| CABLES: Kind Kables |||
||| PREAMPS: Naiant Tinybox | Naiant Littlebox | Naiant IPA | Church BB |||
||| DECKS: Sound Devices MixPre6 | Sony M10 |||
||| PLAYBACK: Outlaw Audio RR2150 > Epos ELS8 |||
||| PHOTO: Sony a6000 | Sony 16-50 | Sony 55-210 | Rokinon 14mm | Rokinon 8mm |||
|||Concert History || LMA Recordings || Live YouTube Channel ||

Offline Chuck

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Re: TASCAM DR-680 portable 8-track #4
« Reply #14 on: August 13, 2011, 04:22:26 PM »
Mike, it's a WAV file that's zipped with WinZip.
I can upload in a different format if you can't open it.
Reality is merely an illusion, albeit a very persistent one.

Microphones: (2) Microtech Gefell M300, (2) AKG C 480 B comb-ULS/ CK 61/ CK 63, (2) CAD GXL1200 (cardioid and sub-cardioid capsule & electronics mod), (2) Audix M1290-o, (2) Micro capsule active cables w/ Naiant PFA's, (2) Naiant MSH-1O, (2) Naiant AKG Active cables, (2) Church CA-11 (cardioid), (2) CAD C9, (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Tascam DR-680, iRiver iHP-120 (Rockboxed & RTC mod), Denon DTR-80p

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

 

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