According to the spreadsheet the smaller enclosure will not work for the f5 as it comes out to 0.811 deg C / Watt higher than the recommended .6 deg c /Watt.
The larger one should work with 0.4227 deg C / Watt but it's too large of an enclosure for that project.
The larger one should work with 0.4227 deg C / Watt but it's too large of an enclosure for that project.
Heatsinks
LabJr. email me directly. I cant email you.
Your close by - I work in Andover. Live in ME
I have some surplus heatsinks that you can see if they work for you. You would need to develop metal working stills to build a case. (hacksaw, drill, taps) but they might be enough for an F5. Wont know till I get some boards...
LabJr. email me directly. I cant email you.
Your close by - I work in Andover. Live in ME
I have some surplus heatsinks that you can see if they work for you. You would need to develop metal working stills to build a case. (hacksaw, drill, taps) but they might be enough for an F5. Wont know till I get some boards...
Re: Heatsinks
Thanks for the offer.
I'm curious about what your heatsinks actually look like although I probably will try to find some kind of enclosure with heatsinks already attached. I would have to be bothersome to a friend with a metal shop to make an enclosure.
Before you build the boards you can probably calculate the appoximate dissipation of the heatsinks by inputting the various parameters in the spreadsheet.
mithomas said:
Thanks for the offer.
I'm curious about what your heatsinks actually look like although I probably will try to find some kind of enclosure with heatsinks already attached. I would have to be bothersome to a friend with a metal shop to make an enclosure.
Before you build the boards you can probably calculate the appoximate dissipation of the heatsinks by inputting the various parameters in the spreadsheet.
I was reading through the F5 PDF file and notice that Nelson recommmends a 6"x 8" heatsink with 2" fins for each output device.
On that spreadsheet it calculates to approx= 0.3935 deg C / Watt when plugging 17 as the number of fins. That's about 33% better than the .6 deg C/ Watt he recommends if the calculations the correct. I guess more is better? But are calculations correct?
On that spreadsheet it calculates to approx= 0.3935 deg C / Watt when plugging 17 as the number of fins. That's about 33% better than the .6 deg C/ Watt he recommends if the calculations the correct. I guess more is better? But are calculations correct?
labjr said:
Did you check the Drawings page on the Heatsink Excel file for the right parameter input ?
The spreadsheet says "width is optional" . What is considered the width. I thought the fin height was the width?
even if I hate to admit that
Jaccovitty is right , as usual ;
just don't tell to Dutchy Whale that I said that .
jacco vermeulen said:
Jaccovitty is right , as usual ;
just don't tell to Dutchy Whale that I said that .
Would anyone have a few CL60 thermistors that they would be willing to part with? Mouser are out of stock until the new year......
Fran
Fran
woodturner-fran said:
I haven't bought any parts yet. Digikey has them in stock. Probably won't help you if you want to order everything from one source.
Hi Everyone,
Do you think i would be able to get away with a pair of MF35-151's from conrad as shown here http://www.conradheatsinks.com/products/flat100_350.html#MF35 .
I would use one per channel.
Thanks!
Do you think i would be able to get away with a pair of MF35-151's from conrad as shown here http://www.conradheatsinks.com/products/flat100_350.html#MF35 .
I would use one per channel.
Thanks!
Having looked over my casing options again, would a 3u case from hifi2000 in italy with heatsinks be enough?
I would have no problem in adding a couple fans on the back panel if needed.
Cheers
An externally hosted image should be here but it was not working when we last tested it.
I would have no problem in adding a couple fans on the back panel if needed.
Cheers
I'm currently using the 40cm 3u version for my f5 and it does not get too hot at all. In fact I think the 30cm would be sufficient.
Well, How much heat am i looking to get rid of? I would like to get the 2u version if possible, as it costs quite a bit less, and i only loose 15w of dissipation.
Thanks for the datasheet.
Edit: Nevermind, i then have the height issue.
Thanks for the datasheet.
Edit: Nevermind, i then have the height issue.
Can anyone tell me the real power output of this amplifier, per channel into 8ohms using standard rails?
Thanks
Thanks
rhysh said:
Check the F5 article/manual that can be downloaded here: http://www.firstwatt.com/products.htm