Help!! Need an enclosure FAST...

[mpm]

Deadline approaching fast.
Anybody know where we can get a heat-sink style enclosure similar to a Takachi EXH ?

http://www.takachi-enclosure.com/data/c16-17/EXH_181101.pdf
Ideally, the EXH14-7-19-BB

Need overnight.
We're in Florida.

Thanks!!

 

[Winfield Hill]

mpm wrote...

Deadline approaching fast.
Anybody know where we can get a heat-sink style enclosure
similar to a Takachi EXH ?

http://www.takachi-enclosure.com/data/c16-17/EXH_181101.pdf
Ideally, the EXH14-7-19-BB=EF=82=A8=EF=82=A8

Need overnight. We're in Florida.

Takachi will no doubt ship by DHL. Properly timed,
DHL can get you a package from China or Japan in
one day. Without taking special care, I've gotten
packages from China on the morning of the 2nd day.


--
Thanks,
- Win

 

[Winfield Hill]

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.


--
Thanks,
- Win

 

On Tuesday, May 7, 2019 at 9:57:12 PM UTC+10, mpm wrote:

Deadline approaching fast.
Anybody know where we can get a heat-sink style enclosure similar to a Takachi EXH ?

http://www.takachi-enclosure.com/data/c16-17/EXH_181101.pdf
Ideally, the EXH14-7-19-BB

Need overnight.
We're in Florida.

Element 14, also known as Farnell and Newark (in the US)
seems to offer this sort of enclosure..

I used their search slot with the string "heat sink enclosure".

Chucking in a few dimensions might narrow the offerings down in a useful way.

https://au.element14.com/multicomp/mcreas80/case-aluminium-80x63-5x30mm/dp/1549965?st=heat%20sink%20enclosure

https://www.newark.com/multicomp/mczcb1/enclosure-bezel/dp/94M8305?st=heat%20sink%20enclosure

Multicomp just means that they use a variety of suppliers.

You will have to dig a bit to get exactly what you want, but Farnell does tend to offer rapid delivery, so it might be worth the effort.

--
Bill Sloman

 

[Phil Hobbs]

On 5/7/19 10:00 AM, John Larkin wrote:

On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.

Almost certainly not. They're too shallow and narrow for much chimney
effect, and they're oriented the wrong way. The fins are thicker, and
so will help conduct heat down the long axis of the box, but not as well
as if the fins weren't cut into it.

They may be useless, but they sure are hard to clean.

Cheers

Phil Hobbs



--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[John Larkin]

On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu>
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.


--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Phil Hobbs]

On 5/7/19 11:05 AM, John Larkin wrote:

On Tue, 7 May 2019 10:11:15 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 5/7/19 10:00 AM, John Larkin wrote:
On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.



Almost certainly not. They're too shallow and narrow for much chimney
effect, and they're oriented the wrong way. The fins are thicker, and
so will help conduct heat down the long axis of the box, but not as well
as if the fins weren't cut into it.

They may be useless, but they sure are hard to clean.

Cheers

Phil Hobbs

If there's a PCB inside, the bad path will be from board to box
inside, with still air and no convection and a small PCB surface area
with hot spots.

Yup, a familiar problem. You can get 5 W/m/K gap pads now though.

Cheers

Phil Hobbs


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[John Larkin]

On Tue, 7 May 2019 10:11:15 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

On 5/7/19 10:00 AM, John Larkin wrote:
On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.



Almost certainly not. They're too shallow and narrow for much chimney
effect, and they're oriented the wrong way. The fins are thicker, and
so will help conduct heat down the long axis of the box, but not as well
as if the fins weren't cut into it.

They may be useless, but they sure are hard to clean.

Cheers

Phil Hobbs

If there's a PCB inside, the bad path will be from board to box
inside, with still air and no convection and a small PCB surface area
with hot spots.




--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Winfield Hill]

John Larkin wrote...

Do you think those stubby little heat sink
bumps help much? I'm thinking they don't.

No doubt it's just for looks.


--
Thanks,
- Win

 

[mpm]

On Tuesday, May 7, 2019 at 11:34:13 AM UTC-4, Winfield Hill wrote:

John Larkin wrote...


Do you think those stubby little heat sink
bumps help much? I'm thinking they don't.

No doubt it's just for looks.

Winner, Winner. Chicken Dinner !!

 

[George Herold]

On Tuesday, May 7, 2019 at 10:11:25 AM UTC-4, Phil Hobbs wrote:

On 5/7/19 10:00 AM, John Larkin wrote:
On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.



Almost certainly not. They're too shallow and narrow for much chimney
effect, and they're oriented the wrong way. The fins are thicker, and
so will help conduct heat down the long axis of the box, but not as well
as if the fins weren't cut into it.

Did you notice that the fins have a wavy surface.
quoting,
"Waved surface heat-sink fins for maximum cooling performance!

■ Each heat-sink fin has a waved surface construction for maximum
cooling performance."

George H.

They may be useless, but they sure are hard to clean.

Cheers

Phil Hobbs



--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[John Larkin]

On Tue, 7 May 2019 08:49:29 -0700 (PDT), mpm <mpmillard@aol.com>
wrote:

On Tuesday, May 7, 2019 at 11:34:13 AM UTC-4, Winfield Hill wrote:
John Larkin wrote...


Do you think those stubby little heat sink
bumps help much? I'm thinking they don't.

No doubt it's just for looks.


Winner, Winner. Chicken Dinner !!

Racing stripes? Pokemon stickers?


--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Johnny B Good]

On Tue, 07 May 2019 08:05:30 -0700, John Larkin wrote:

On Tue, 7 May 2019 10:11:15 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 5/7/19 10:00 AM, John Larkin wrote:
On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where we can get a
heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to fins and purchase
some product that uses a case similar to what you have in mind,
dis-assemble it and use its case. 12V to 115Vac inverters come in
cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.



Almost certainly not. They're too shallow and narrow for much chimney
effect, and they're oriented the wrong way. The fins are thicker, and
so will help conduct heat down the long axis of the box, but not as well
as if the fins weren't cut into it.

They may be useless, but they sure are hard to clean.

Cheers

Phil Hobbs

If there's a PCB inside, the bad path will be from board to box inside,
with still air and no convection and a small PCB surface area with hot
spots.

That's basic heat dissipation failure techniques 101. Seagate used it to
good (bad?) effect with their FreeAgent external hard drives to ensure
early failure, even going to the extreme of doctoring the spin down power
saving mode into an immutable 10 minute spin down in their "Specials",
thoughtfully denoted by the use, appropriately enough, of the suffix
letter "S" in the drive model numbers.

I think John Larkin's ex-intern (or someone equally clueless) must have
landed himself a job with Seagate's external drive storage division...
seriously!

--
Johnny B Good

 

[whit3rd]

On Tuesday, May 7, 2019 at 4:57:12 AM UTC-7, mpm wrote:

Deadline approaching fast.
Anybody know where we can get a heat-sink style enclosure similar to a Takachi EXH ?

http://www.takachi-enclosure.com/data/c16-17/EXH_181101.pdf
Ideally, the EXH14-7-19-BB

Need overnight.
We're in Florida.

Find a high-end auto audio place, and buy an amplifier with the approximately
right size? No need to wait for overnight.

 

[Clifford Heath]

On 7/5/19 10:44 pm, Winfield Hill wrote:

mpm wrote...

Deadline approaching fast. Anybody know where
we can get a heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to
fins and purchase some product that uses a case
similar to what you have in mind, dis-assemble
it and use its case. 12V to 115Vac inverters
come in cases with external heatsink structure.

Auto sub-woofer amplifiers too

 

[R Collins]

On Tuesday, May 7, 2019 at 7:57:12 AM UTC-4, mpm wrote:

Deadline approaching fast.
Anybody know where we can get a heat-sink style enclosure similar to a Takachi EXH ?

http://www.takachi-enclosure.com/data/c16-17/EXH_181101.pdf
Ideally, the EXH14-7-19-BB

Need overnight.
We're in Florida.

Thanks!!

Many times asking this group a simple question is like asking Statler and Waldorf. I hope you find something. I've not seen any product this interesting for heat dissipation. Why is it you can't buy it from Takachi?

--

Rick C.

- Get a 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[John Larkin]

On Tue, 07 May 2019 20:13:32 GMT, Johnny B Good
<johnny-b-good@invalid.ntlworld.com> wrote:

On Tue, 07 May 2019 08:05:30 -0700, John Larkin wrote:

On Tue, 7 May 2019 10:11:15 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 5/7/19 10:00 AM, John Larkin wrote:
On 7 May 2019 05:44:36 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

mpm wrote...

Deadline approaching fast. Anybody know where we can get a
heat-sink style enclosure similar ...

If you are truly desperate, your best bet is to fins and purchase
some product that uses a case similar to what you have in mind,
dis-assemble it and use its case. 12V to 115Vac inverters come in
cases with external heatsink structure.

Do you think those stubby little heat sink bumps help much? I'm
thinking they don't.



Almost certainly not. They're too shallow and narrow for much chimney
effect, and they're oriented the wrong way. The fins are thicker, and
so will help conduct heat down the long axis of the box, but not as well
as if the fins weren't cut into it.

They may be useless, but they sure are hard to clean.

Cheers

Phil Hobbs

If there's a PCB inside, the bad path will be from board to box inside,
with still air and no convection and a small PCB surface area with hot
spots.

That's basic heat dissipation failure techniques 101. Seagate used it to
good (bad?) effect with their FreeAgent external hard drives to ensure
early failure, even going to the extreme of doctoring the spin down power
saving mode into an immutable 10 minute spin down in their "Specials",
thoughtfully denoted by the use, appropriately enough, of the suffix
letter "S" in the drive model numbers.

I think John Larkin's ex-intern (or someone equally clueless) must have
landed himself a job with Seagate's external drive storage division...
seriously!

I'm always happy to spread incompetence throughout the rest of the
industry.


--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[John Larkin]

On Tue, 7 May 2019 20:07:30 -0700 (PDT), mpm <mpmillard@aol.com>
wrote:

On Tuesday, May 7, 2019 at 11:05:39 AM UTC-4, John Larkin wrote:
... If there's a PCB inside, the bad path will be from board to box
inside, with still air and no convection and a small PCB surface area
with hot spots.

You are a mind-reader.

This build will have 14 watts to dissipate (min).
Do-able, but not trivial.

Of course, the boss mentioned today he'd like the higher-power board installed.
It never ends....

You need a lot of copper planes inside the board, spread out the hot
spots, and then use a gap-pad to move heat from the board to the box.
14 watts is, as you note, doable.

Better yet, heat sink the power semis directly to the inside of the
box.


--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[mpm]

On Tuesday, May 7, 2019 at 11:05:39 AM UTC-4, John Larkin wrote:

... If there's a PCB inside, the bad path will be from board to box
inside, with still air and no convection and a small PCB surface area
with hot spots.

You are a mind-reader.

This build will have 14 watts to dissipate (min).
Do-able, but not trivial.

Of course, the boss mentioned today he'd like the higher-power board installed.
It never ends....

 

[mpm]

On Tuesday, May 7, 2019 at 9:19:36 PM UTC-4, R Collins wrote:
> Many times asking this group a simple question is like asking Statler and Waldorf. I hope you find something. I've not seen any product this interesting for heat dissipation. Why is it you can't buy it from Takachi? ...

Takachi is located in Japan, and purchasing said there was some sort of national holiday. So, we won't know until tomorrow (maybe?) whether they even have these in stock. And the clock is still ticking...., and they still have to get here.

I've looked around quite a bit (domestically) and really haven't found anything that looks quite as nice as these Takachi boxes, short of rolling something custom that we just don't have time for. (And if you think that's bad, I haven't mentioned the stress getting the box internals done!)

R&D might have to initiate a new policy of NO NEW DESIGNS (or re-work) for upcoming trade shows. Period. (Note: Will never happen.)