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Author Topic: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule  (Read 14796 times)

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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #15 on: September 17, 2012, 08:04:49 PM »
4amps huh... I just checked mine and it registers as four amps is the max draw for the battery, I actually thought it would be less than that. My i unit has gotten hot before with an expansion bay (using it with my 722), so I wonder if it is a combination of the excessive draw related to your 788 and the heat dissipation with having it in a sequestered bag.

Dunno, but that sucks eitherway.
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #16 on: September 17, 2012, 08:12:09 PM »
Funny thing is that my bag was wide open and it was maybe 45-55 degrees out. We were outside in Vail, CO. (well in the pavillion of The Gerald Ford Ampitheatre)
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #17 on: September 17, 2012, 10:30:14 PM »
Bottom line is batteries shouldn't melt/explode/catch fire.

i'm not saying its the case here, but if the battery is used incorrectly, that's neither the battery or the manufacturers fault.  Just sayin that theres some operator responsibility involved.

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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #18 on: September 18, 2012, 02:28:52 PM »
Funny thing is that my bag was wide open and it was maybe 45-55 degrees out. We were outside in Vail, CO. (well in the pavillion of The Gerald Ford Ampitheatre)

dunno, I bring nothing to the table then. You might ask SD if increasing voltage will reduce draw, but I don't think it does for the older 7xx units.
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #19 on: September 18, 2012, 08:02:50 PM »
Definitely a current issue draw issue here and an overheating of the DC-DC converter portion of the battery - you may want to set the battery voltage as high as the 788 can take as it should reduce the over all current required (if it is a DC-DC converter - which I know the other 7xx series use).

Some batteries will shutdown if the current draw is too high - found this out the hard way couldn't run my hs-p82 off one of my electrovaya batterys.

It's unfortunate the Tekkeon doesn't have this function but Tonedeaf is probably right in the sense that proabably a cell was failing or the overall life time of the battery hit a certain point.
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #20 on: September 18, 2012, 08:06:30 PM »
Also note that the harder you drive your cells the less time they will last.  Especially true with SLA's and Poly-LiOn - solution is to run many cells in parallel.

I am currently running my hs-p82 off a 12Ah 12V SLA due to the problem I ran into but someday I will migrate to a LiOn solution (either my own using batteryspace parts, a battery space built one, or the one Louie/Stu are running).
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #21 on: September 18, 2012, 08:25:21 PM »
Perhaps NP1 type external batteries would make a better choice for powering 788t's than tekkeon.
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #22 on: September 18, 2012, 08:58:46 PM »
Power:

Power supply (batteries): operating cell, removable 7.2 V (nominal) Sony L-type Li-ion, operational from 6.5–8.5 V, time code battery, internal 3.6 Li–ion
Power supply (external): 10–18 V, 1000 mA minimum, via locking 4-pin Hirose connector, use Hirose #HR10-7P-4P (DigiKey# HR100-ND) for locking mating DC connector; pin-1 (-), pin-4 (+).
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #23 on: September 18, 2012, 09:25:30 PM »
XL-NPH Adapter for NP-Type Batteries
Power Adaptor

NP-type battery cup with 24-inch cable terminated in a Hirose 4-pin locking DC connector (HR10-7P-4P) at the equipment end. For use with Sound Devices MixPre (s/n >0506), 302, 442 (sn >0303), and 7-Series recorders.

Note: Not for use with Sony L or M mount rechargeable batteries which mount directly on 7-Series recorders.
Key Features

    Accepts NP-type batteries
    24-inch cord to Hirose 4-pin connector for direct mixer or recorder interconnection



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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #24 on: September 18, 2012, 10:33:16 PM »
Going to have to pick one of those up. I never have seen that.
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #25 on: September 19, 2012, 11:13:39 AM »
Also note that the harder you drive your cells the less time they will last.  Especially true with SLA's and Poly-LiOn - solution is to run many cells in parallel.

I am currently running my hs-p82 off a 12Ah 12V SLA due to the problem I ran into but someday I will migrate to a LiOn solution (either my own using batteryspace parts, a battery space built one, or the one Louie/Stu are running).

Richard...this is probably a topic for another thread, but your point is well taken.  As time has progressed we've come to expect lighter batteries with better power density, but our gear is also more power hungry.  Seems there might be a tipping point there somewhere that colorartist and other 788 owners (and other high current draw gear) may need to be cognizant of.

Personally, I still prefer SLAs because of their low cost, but moreso because I like having oodles of spare power on-hand.  In addition, pig-tailing my power cables allows for parallel battery connections.  I had originally done this to maximize my run-times between battery changes, but your comment points out that the pigtails might also have helped to address potential battery loading issues.
« Last Edit: September 19, 2012, 11:18:42 AM by tonedeaf »

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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #26 on: September 19, 2012, 11:56:16 AM »
I am a little confused by that SD battery sled.


http://www.sounddevices.com/products/xlnph/

NP-type battery cup with 24-inch cable terminated in a Hirose 4-pin locking DC connector (HR10-7P-4P) at the equipment end. For use with Sound Devices MixPre (s/n >0506), 302, 442 (sn >0303), and 7-Series recorders.

Note: Not for use with Sony L or M mount rechargeable batteries which mount directly on 7-Series recorders.

I thought NP batteries were L series batteries? When you look at batteries on the B and H website the batteries all say NP-xxx L-series battery.
They also mount directly on the 7-series recorders.

I just don't want to end up with a battery sled that doesn't work.



http://www.bhphotovideo.com/c/search?Ntt=L-Series&ci=4949&N=4267396449
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #27 on: September 19, 2012, 12:11:59 PM »
I am a little confused by that SD battery sled.


http://www.sounddevices.com/products/xlnph/

NP-type battery cup with 24-inch cable terminated in a Hirose 4-pin locking DC connector (HR10-7P-4P) at the equipment end. For use with Sound Devices MixPre (s/n >0506), 302, 442 (sn >0303), and 7-Series recorders.

Note: Not for use with Sony L or M mount rechargeable batteries which mount directly on 7-Series recorders.

I thought NP batteries were L series batteries? When you look at batteries on the B and H website the batteries all say NP-xxx L-series battery.
They also mount directly on the 7-series recorders.

I just don't want to end up with a battery sled that doesn't work.



http://www.bhphotovideo.com/c/search?Ntt=L-Series&ci=4949&N=4267396449

I think that sled uses np-1 style batteries.  http://www.bhphotovideo.com/c/search?Ntt=np-1+style+battery&N=0&InitialSearch=yes&sts=ma&Top+Nav-Search=
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #28 on: September 19, 2012, 12:44:30 PM »
Oh. bummer. It seems like it would be the perfect solution to just reuse your your onboard batteries for externals. Then you wouldn't need two types of batteries.
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Re: Tekkeon 3450i melted powering my 788t 3 nights ago at Mule
« Reply #29 on: September 19, 2012, 01:23:07 PM »
NP1 type batteries are pretty much a universal standard, hence my initial suggestion that they could make a better external powering option than tekkeon's.  I personally use NP1-SB's or a tekkeon MP3450 for my MixPre-D but considering your meltdown you may want to consider switching over to NP1 style batteries for your 788t.
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