Decreasing power consumption to 10-11W would allow us to use lighter enclosure for the lab version, which is nice.
at 20w of power consumption, this comes to roughly 68btu of generated heat -Is there a reason convection cooling in a sheetmetal enclosure wouldent work for this board?
On Thu, Nov 1, 2012 at 12:00 AM, Darby darbysgoodies@gmail.com wrote:
Decreasing power consumption to 10-11W would allow us to use lighter enclosure for the lab version, which is nice.
at 20w of power consumption, this comes to roughly 68btu of generated heat -Is there a reason convection cooling in a sheetmetal enclosure wouldent work for this board?
No reason except the fact I don't like noisy fans. :)
Seriously speaking - it's just easier to find a case without a fan from what I see. But if someone find or design a good case with a fan - we'll use it.
No reason except the fact I don't like noisy fans. :)
Seriously speaking - it's just easier to find a case without a fan from what I see. But if someone find or design a good case with a fan - we'll use it.
lol I hear ya, Im just thinking with that seemingly minimal amount of heat (that many BTU's this would raise the temp of a us gal of water by 8.2f, or a liter of water by ~17c), it shouldent really make too much of a difference to have a rectangular case thats enclosed & has a few holes punched in it...
To my knowledge, theres no special cooling considerations taken into account for any of the USRP's?
On Thu, Nov 1, 2012 at 2:03 AM, Darby darbysgoodies@gmail.com wrote:
No reason except the fact I don't like noisy fans. :)
Seriously speaking - it's just easier to find a case without a fan from what I see. But if someone find or design a good case with a fan
- we'll use it.
lol I hear ya, Im just thinking with that seemingly minimal amount of heat (that many BTU's this would raise the temp of a us gal of water by 8.2f, or a liter of water by ~17c), it shouldent really make too much of a difference to have a rectangular case thats enclosed & has a few holes punched in it...
Sorry, I misread your e-mail yesterday - I thought you're asking why we don't use a case _with_ a fan.
The only issue with passive cooling is that we need to make a good contact between UmTRX and a case. And this requires careful selection of a proper case and design of mounting. Again - if you or someone else want to take on this task - we'd be happy use it.
To my knowledge, theres no special cooling considerations taken into account for any of the USRP's?
Not sure I understand the question.
The only issue with passive cooling is that we need to make a good contact between UmTRX and a case. And this requires careful selection of a proper case and design of mounting. Again - if you or someone else want to take on this task - we'd be happy use it.
Hmm, Could be doable... Its been a while since Ive done any 3D design, you know of anything in particular that's free & one could learn fairly quickly for a project such as this?
To my knowledge, theres no special cooling considerations taken into account for any of the USRP's?
Not sure I understand the question. No worries, was more of a statement than a question... =)
Darby,
I apologize for the delayed answer - I was traveling to US to do more demonstrations of UmTRX.
On Fri, Nov 2, 2012 at 5:39 AM, Darby darbysgoodies@gmail.com wrote:
The only issue with passive cooling is that we need to make a good contact between UmTRX and a case. And this requires careful selection of a proper case and design of mounting. Again - if you or someone else want to take on this task - we'd be happy use it.
Hmm, Could be doable... Its been a while since Ive done any 3D design, you know of anything in particular that's free & one could learn fairly quickly for a project such as this?
Unfortunately I don't know any - never looked at the 3D modeling tools.
I'm not sure whether you actually need a 3D design here? As I see it, you select a proper existing case and just design front/rear panels and drilling pattern for mounting. I may be wrong, though - I've never done this before. I just worry that a fully custom case could be too expensive in small quantities.
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru
Darby,
I apologize for the delayed answer - I was traveling to US to do more demonstrations of UmTRX.
No worries, Im sure youre a busy guy -especially at this stage of the project =)
I'm not sure whether you actually need a 3D design here? As I see it,
you select a proper existing case and just design front/rear panels and drilling pattern for mounting. I may be wrong, though - I've never done this before. I just worry that a fully custom case could be too expensive in small quantities.
Im sure you could use a preexisting design, and just punch some holes in the sides for convection cooling, then punch some holes in the back to accommodate power & cabling, and use some motherboard standoffs that would keep the board mounted in place on the enclosure floor.
I was thinking more along the lines of stamped/bent sheet metal, some lightpipes (plexyglass or polycarbonate) in the front so youve got visibility of the lights in the front & some countersunk holes on the sides to keep the 2 C shaped (or L shaped would work well too? -Which might be a better implementation for mounting purposes if youre going with lightpipes as opposed to holes in the case for lights) pieces bolted together & a powdercoated or painted finish?
I found some design tools at protocase, that it looks as though will pushout 3d cad files as deliverables, but looking thru the project files -I cant seem to find anything that would give me specifics on distances between the mounting holes from each other's centerpoints & how wide these holes are, If someone can point me to a place where I can find this -Ill take a stab at case design when Ive got some free time... =)
On a side note, They also have an extruded aluminum offering (http://www.protocase.com/products/index.php?e=Aluminum) where the sides are the same between the left & the right, with a fixed height of 1.72" (43.688mm). For mounting they use some internal channels that the board will slide into (as opposed to motherboard standoffs as suggested above) then they use a sheetmetal bridge for the top & bottom to determine the width & then sheetmetal on front & back as well -Depending on quantity, they might be willing to sell lengths (like say 10 or 20ft at a time) that your people could cut to size & fabricate their own top/bottom/front/back panels?
Just a thought...
On Thu, Nov 8, 2012 at 11:30 PM, Darby darbysgoodies@gmail.com wrote:
I'm not sure whether you actually need a 3D design here? As I see it, you select a proper existing case and just design front/rear panels and drilling pattern for mounting. I may be wrong, though - I've never done this before. I just worry that a fully custom case could be too expensive in small quantities.
Im sure you could use a preexisting design, and just punch some holes in the sides for convection cooling, then punch some holes in the back to accommodate power & cabling, and use some motherboard standoffs that would keep the board mounted in place on the enclosure floor.
Yes, I was looking for something like that - simple and inexpensive. It would be a shame if a case cost a considerable part of the thing.
I was thinking more along the lines of stamped/bent sheet metal, some lightpipes (plexyglass or polycarbonate) in the front so youve got visibility of the lights in the front & some countersunk holes on the sides to keep the 2 C shaped (or L shaped would work well too? -Which might be a better implementation for mounting purposes if youre going with lightpipes as opposed to holes in the case for lights) pieces bolted together & a powdercoated or painted finish?
For lab version we could use 3-LED columns, like the ones we used in UmTRXv1: http://wiki.umtrx.googlecode.com/hg/images/umtrxv1/UmTRX-top.jpg UmTRXv2 has places to colder them instead of SMD LEDs: http://wiki.umtrx.googlecode.com/hg/images/umtrxv2/UmTRXv2.jpg In this case light-pipes are not needed and we could just drill holes at the front panel.
I have no preference between U/C, L or slide-in cases. Anything which is easy to handle, inexpensive and looks good is fine.
I found some design tools at protocase, that it looks as though will pushout 3d cad files as deliverables, but looking thru the project files -I cant seem to find anything that would give me specifics on distances between the mounting holes from each other's centerpoints & how wide these holes are, If someone can point me to a place where I can find this -Ill take a stab at case design when Ive got some free time... =)
No idea, sorry. I think you'd best contact Protocase with this uestion - I think they should be interested in supporting potential customers.
On a side note, They also have an extruded aluminum offering (http://www.protocase.com/products/index.php?e=Aluminum) where the sides are the same between the left & the right, with a fixed height of 1.72" (43.688mm). For mounting they use some internal channels that the board will slide into (as opposed to motherboard standoffs as suggested above) then they use a sheetmetal bridge for the top & bottom to determine the width & then sheetmetal on front & back as well -Depending on quantity, they might be willing to sell lengths (like say 10 or 20ft at a time) that your people could cut to size & fabricate their own top/bottom/front/back panels?
Just a thought...
Hum, this looks interesting. Though we need something ready, i.e. already cut and with ready-to-use front/back panels.
I wonder how much would it cost to get cases shipped from them to Europe. For, say, 20-50pcs.
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru
Unfortunately, Protocase can't supply proper heat sink as we might wish.
Best regards, Andrey Sviyazov.
2012/11/12 Alexander Chemeris alexander.chemeris@gmail.com
On Thu, Nov 8, 2012 at 11:30 PM, Darby darbysgoodies@gmail.com wrote:
I'm not sure whether you actually need a 3D design here? As I see it, you select a proper existing case and just design front/rear panels and drilling pattern for mounting. I may be wrong, though - I've never done this before. I just worry that a fully custom case could be too expensive in small quantities.
Im sure you could use a preexisting design, and just punch some holes in the sides for convection cooling, then punch some holes in the back to accommodate power & cabling, and use some motherboard standoffs that would keep the board mounted in place on the enclosure floor.
Yes, I was looking for something like that - simple and inexpensive. It would be a shame if a case cost a considerable part of the thing.
I was thinking more along the lines of stamped/bent sheet metal, some lightpipes (plexyglass or polycarbonate) in the front so youve got visibility of the lights in the front & some countersunk holes on the sides to keep the 2 C shaped (or L shaped would work well too? -Which might be a better implementation for mounting purposes if youre going with lightpipes as opposed to holes in the case for lights) pieces bolted together & a powdercoated or painted finish?
For lab version we could use 3-LED columns, like the ones we used in UmTRXv1: http://wiki.umtrx.googlecode.com/hg/images/umtrxv1/UmTRX-top.jpg UmTRXv2 has places to colder them instead of SMD LEDs: http://wiki.umtrx.googlecode.com/hg/images/umtrxv2/UmTRXv2.jpg In this case light-pipes are not needed and we could just drill holes at the front panel.
I have no preference between U/C, L or slide-in cases. Anything which is easy to handle, inexpensive and looks good is fine.
I found some design tools at protocase, that it looks as though will pushout 3d cad files as deliverables, but looking thru the project files -I cant seem to find anything that would give me specifics on distances between the mounting holes from each other's centerpoints & how wide these holes are, If someone can point me to a place where I can find this -Ill take a stab at case design when Ive got some free time... =)
No idea, sorry. I think you'd best contact Protocase with this uestion
- I think they should be interested in supporting potential customers.
On a side note, They also have an extruded aluminum offering (http://www.protocase.com/products/index.php?e=Aluminum) where the sides are the same between the left & the right, with a fixed height of 1.72" (43.688mm). For mounting they use some internal channels that the board will slide into (as opposed to motherboard standoffs as suggested above) then they use a sheetmetal bridge for the top & bottom to determine the width & then sheetmetal on front & back as well -Depending on quantity, they might be willing to sell lengths (like say 10 or 20ft at a time) that your people could cut to size & fabricate their own top/bottom/front/back panels?
Just a thought...
Hum, this looks interesting. Though we need something ready, i.e. already cut and with ready-to-use front/back panels.
I wonder how much would it cost to get cases shipped from them to Europe. For, say, 20-50pcs.
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru
On Mon, Nov 12, 2012 at 1:47 AM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
Unfortunately, Protocase can't supply proper heat sink as we might wish.
Do you think those cases can't sustain UmTRXv2+UmSEL heat dissipation if supplied with a fan? Remember we're talking about a lab enclosure without any additional power amplification.
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru
No problems in case of fan usage, of course. Like well known USRP's. And I think, that 40x40mm fan can cooling two PA's around 0.5-1W each. But do not ask "whats up?" if fan stopped ;)
Best regards, Andrey Sviyazov.
2012/11/12 Alexander Chemeris alexander.chemeris@gmail.com
On Mon, Nov 12, 2012 at 1:47 AM, Andrey Sviyazov andreysviyaz@gmail.com wrote:
Unfortunately, Protocase can't supply proper heat sink as we might wish.
Do you think those cases can't sustain UmTRXv2+UmSEL heat dissipation if supplied with a fan? Remember we're talking about a lab enclosure without any additional power amplification.
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru
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Alexander Chemeris -
Andrey Sviyazov -
Darby