Topic: TASCAM DR-680 portable 8-track Part 2

[headroom]

12 Volt LION 6.8 Ah the Tascam drinks between 340 mA and 400mA with all Phantom On relative cool running device= good sound  4.8 Watt SONY is King PCM D50 0.5 Watt. Dont make the wires Battery/Device to long 8 inch is much to long. An if you can put some Bypass Low ESR parallel to the external Supply.

Dont use the bare LIPO or better LIPOFE4. Put several 470uF/16V Rubicon black Gate Low ESR in parallel. Recomended 20 Pieces or more 470uF/16V and cut of the plastic housing from the caps. Sound depends on the capacity of the batteries size deeper internal impedance = more control, less influence the wires and the connectors, LiFePO A123 are best and safest. LION is not as good has some protection circiuts wich gives a higher internal impedance.
The secret of good sound with LiFePO4 is give easy and fast a big amount of current many amperes...


http://www.computeraudiophile.com/content/Just-upgraded-Hiface-EVO?page=3#comment-59989

Headroom knows his stuff. Listen to him.

Any battery technology must be appended with low ESR capacitors so that the transient currents dont sag the voltage. This is what sucks the life out of your music. Also, the wiring that you run from the battery pack or the capacitor bank to the circuit is critical. Not just loose wires, and the gauge and geometry matters.

His charging guidelines are also good, although this must be evaluated for every circuit. Regulators need some headroom. If you get too close to this headroom, they will fail to regulate well, resulting in varying voltage and poor sound quality.

Steve N.
Empirical Audio

[yltfan]

^ What does that mean for folks using DVD batteries?
I've never had a shutdown, but don't think I've ever run mine for more than 2 hours straight.

[Chadfish]

That's all Greek to me! Can someone break that down into layman's terms?

I work in video And I'm looking at something that can power both my DR-680, and my MixPre. Possibly a light & the camera too.

Using this Battery Distribution unit: http://www.bhphotovideo.com/c/product/646088-REG/Remote_Audio_BDS1_6V3_BDS_v3_Battery_Distribution.html

And this: NP1 battery http://www.bhphotovideo.com/c/product/389035-REG/IDX_NP_L7S_NP_L7S_NP_1_Style_Lithium_Ion.html

[kirk97132]

12 Volt LION 6.8 Ah the Tascam drinks between 340 mA and 400mA with all Phantom On relative cool running device= good sound  4.8 Watt SONY is King PCM D50 0.5 Watt. Dont make the wires Battery/Device to long 8 inch is much to long. An if you can put some Bypass Low ESR parallel to the external Supply.

Dont use the bare LIPO or better LIPOFE4. Put several 470uF/16V Rubicon black Gate Low ESR in parallel. Recomended 20 Pieces or more 470uF/16V and cut of the plastic housing from the caps. Sound depends on the capacity of the batteries size deeper internal impedance = more control, less influence the wires and the connectors, LiFePO A123 are best and safest. LION is not as good has some protection circiuts wich gives a higher internal impedance.
The secret of good sound with LiFePO4 is give easy and fast a big amount of current many amperes...


http://www.computeraudiophile.com/content/Just-upgraded-Hiface-EVO?page=3#comment-59989

Headroom knows his stuff. Listen to him.

Any battery technology must be appended with low ESR capacitors so that the transient currents dont sag the voltage. This is what sucks the life out of your music. Also, the wiring that you run from the battery pack or the capacitor bank to the circuit is critical. Not just loose wires, and the gauge and geometry matters.

His charging guidelines are also good, although this must be evaluated for every circuit. Regulators need some headroom. If you get too close to this headroom, they will fail to regulate well, resulting in varying voltage and poor sound quality.

Steve N.
Empirical Audio

Well after reading the thread, I am confused.  you quoted the article that says to use caps(capacitors) but a few post down there is this post by "headroom":
LIFEPO is a good idea, I did not know that Bypassing with caps will hurt.I am a looking right now to change it in my system too.

SO it would seem that add any capacitor type setup in line to a dvd(Li-ion) is harmful. 

I think that copying and pasting quotes from a thread out of context like this makes the technical information even more confusing that it is normally.  And correct me if I am wrong isn't this thread that the quotes are taken from in regards to better performance out of an ac wallwart powered Digital audio converter home unit?   Not for a unit that is designed to be run on batteries.  We all ready know from real life experiences that the 680 will operate on voltages well below the specified 12 volts in the manual.  So maybe this type of solution is of some help to an appliance that is looking for an exact voltage, what about one that operates on a range of voltages?  And there is no explanation of the statement "8 inches is much too long"  Too long for what, the capacitor circuits? The internal wiring that is being discussed in regards to by passing an electrical circuit originally designed for AC power?  Too long for...what gauge of wire.  Too long for what voltage?  Too long for what amperage?  I'm not sure that without more explanations and how this relates to powering up, in this case a Tascam DR-680, that this information is any help at all.   

I understand the theory of capacitors smoothing a voltage ripple.  But in the thread there is even a statement that seems like this particular solution is based on SLA batteries.  And in fact is not helpful for Li-ion batteries.  And even if I look at the link "headroom" supplied about installing caps, the ripple voltages are in the neighborhood of .08 volts.  Can a ripple effect of less than a tenth of a volt really have an effect on a deck that can operate at 3 volts less than what is recommended?   So I'd be interested in an in depth analysis of exactly how this relates to the Dr-680.

[oleg]

That's all Greek to me! Can someone break that down into layman's terms?

I work in video And I'm looking at something that can power both my DR-680, and my MixPre. Possibly a light & the camera too.

Using this Battery Distribution unit: http://www.bhphotovideo.com/c/product/646088-REG/Remote_Audio_BDS1_6V3_BDS_v3_Battery_Distribution.html

And this: NP1 battery http://www.bhphotovideo.com/c/product/389035-REG/IDX_NP_L7S_NP_L7S_NP_1_Style_Lithium_Ion.html

what camera do you use ?

[Chadfish]

I have a pair of Sony PMW-EX1 cameras. Power Requirements are 12VDC. Power consumption is 12.5W. Really really sweet cameras... I have a large battery that covers most things. But if I were planted in one place for a long all day situation it'd be col to hook up to a big NP1 and forget about it.

[oleg]

forget about np-1
 that one is bigger , good for camera and for bag for sound
http://www.globalmediapro.com/dp/A28XN3/Globalmediapro-DCU95-Battery-95WH-with-D-Tap/

[groovon]

12 Volt LION 6.8 Ah the Tascam drinks between 340 mA and 400mA with all Phantom On relative cool running device= good sound  4.8 Watt SONY is King PCM D50 0.5 Watt. Dont make the wires Battery/Device to long 8 inch is much to long. An if you can put some Bypass Low ESR parallel to the external Supply.

Dont use the bare LIPO or better LIPOFE4. Put several 470uF/16V Rubicon black Gate Low ESR in parallel. Recomended 20 Pieces or more 470uF/16V and cut of the plastic housing from the caps. Sound depends on the capacity of the batteries size deeper internal impedance = more control, less influence the wires and the connectors, LiFePO A123 are best and safest. LION is not as good has some protection circiuts wich gives a higher internal impedance.
The secret of good sound with LiFePO4 is give easy and fast a big amount of current many amperes...


http://www.computeraudiophile.com/content/Just-upgraded-Hiface-EVO?page=3#comment-59989

Headroom knows his stuff. Listen to him.

Any battery technology must be appended with low ESR capacitors so that the transient currents dont sag the voltage. This is what sucks the life out of your music. Also, the wiring that you run from the battery pack or the capacitor bank to the circuit is critical. Not just loose wires, and the gauge and geometry matters.

His charging guidelines are also good, although this must be evaluated for every circuit. Regulators need some headroom. If you get too close to this headroom, they will fail to regulate well, resulting in varying voltage and poor sound quality.

Steve N.
Empirical Audio

You got the current draw of the DR-680 right, and also the fact that voltage regulators need sufficient headroom to operate correctly.

The rest of your post is pure bullshit.

[burris]

Not entirely B.S., the advice to never use a bare lithium battery without a protection circuit is sound.  Also, the new LiFePO4 batteriers are an order of magnitude less likely to experience "thermal runaway," have a much greater cycle life, and have greater energy density than regular Li-ion/poly after 1 year due to greater calendar life, so using them would definitely be "better."

[headroom]

You got the current draw of the DR-680 right, and also the fact that voltage regulators need sufficient headroom to operate correctly.

The rest of your post is pure bullshit.
[/quote]

Googel that stuff and make yourself a bit more intelligent....

[groovon]

Not entirely B.S., the advice to never use a bare lithium battery without a protection circuit is sound.  Also, the new LiFePO4 batteriers are an order of magnitude less likely to experience "thermal runaway," have a much greater cycle life, and have greater energy density than regular Li-ion/poly after 1 year due to greater calendar life, so using them would definitely be "better."

"Not entirely bullshit". Right, the 'purity' of the BS was contaminated by a small amount of truth!

[groovon]

You got the current draw of the DR-680 right, and also the fact that voltage regulators need sufficient headroom to operate correctly.

The rest of your post is pure bullshit.

Googel that stuff and make yourself a bit more intelligent....
[/quote]


Do you mean the bit about "any battery technology" needing to have reservoir capacitors added??

Or the part where you say "8 inch is much too long" (sic) in a battery cable??


I clicked on the link you provided earlier ('Computer Audiophile') and my bullshit detector overloaded.

[Chuck]

Not entirely B.S., the advice to never use a bare lithium battery without a protection circuit is sound.  Also, the new LiFePO4 batteriers are an order of magnitude less likely to experience "thermal runaway," have a much greater cycle life, and have greater energy density than regular Li-ion/poly after 1 year due to greater calendar life, so using them would definitely be "better."

"Not entirely bullshit". Right, the 'purity' of the BS was contaminated by a small amount of truth!

I have to say I thought the same thing. Lol 
But I opted out of starting a flame war.

[groovon]

Chuck, you were being sensible to hang back. kirkd and Jon were very well-mannered and rational, as they always are.

Not me I'm afraid. If I was rude to anyone, sorry, but audiophool logic makes smoke come out of my ears. 

[headroom]

All this information stuff is coming from HighEnd Audio. Part of 30 years expirience with deep research. One of my sources is this guy:
http://www.audio-consulting.ch/?Philosophy
A new research study about new ideas/concepts:
They apear as a treat to poeple and they kling irrational to the old belive system...
And from now on  I stopp sharing information.