Hello,
Because i'm new, here i haven't read all the pages so excuse my (maybe allready answered) question.
I've got all the parts and want to start building, but... will two heatsinks (fischer SK47) do the job ?
According to the chart they are rated @ 0.55 C/W.
Please don't tell me to buy bigger heatsinks 😕
Tell me it will enough.....?
Gr
Nick
Because i'm new, here i haven't read all the pages so excuse my (maybe allready answered) question.
I've got all the parts and want to start building, but... will two heatsinks (fischer SK47) do the job ?
According to the chart they are rated @ 0.55 C/W.
Please don't tell me to buy bigger heatsinks 😕
Tell me it will enough.....?
Gr
Nick
Nick,
This has been covered pretty well on other threads...
http://www.diyaudio.com/forums/showthread.php?s=&threadid=7540
And here:
http://www.diyaudio.com/forums/showthread.php?s=&postid=21829&highlight=temperature#post21829
This has been covered pretty well on other threads...
http://www.diyaudio.com/forums/showthread.php?s=&threadid=7540
And here:
http://www.diyaudio.com/forums/showthread.php?s=&postid=21829&highlight=temperature#post21829
Hello Nick,
The your heatsinks (2 x 0.55 C/W per one Aleph 5 channel)
will run around 42 C above ambient temperature.
This is little high, but it should work.
Also, the lifespan of the output devices will be little shorter.
The 3 x 0.55 C/W per one Aleph 5 Channel would be better,
and at the end, not that much expensive.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
The your heatsinks (2 x 0.55 C/W per one Aleph 5 channel)
will run around 42 C above ambient temperature.
This is little high, but it should work.
Also, the lifespan of the output devices will be little shorter.
The 3 x 0.55 C/W per one Aleph 5 Channel would be better,
and at the end, not that much expensive.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Does anyone know if it would be a crime to use a 2 x 25Vac transformer instead of a 2 x 28Vac for the Alpeh 5 ?
Maybe the lower voltage can compensate the shortage in heatsink ? 🙄
Gr,
Nick
Maybe the lower voltage can compensate the shortage in heatsink ? 🙄
Gr,
Nick
Well Blank527,
You don't seem to have a problem with cooling your amp....
Those heatsinks, are they Fischer types 😕
If yes, do you have a supplier adres for The Netherlands...
The few amounts of watts that i'll lose don't matter (i hope)
I hope those power failures in Amsterdam aren't caused by you tunrning on the amp (since you don't inrusch limiters) 😉
Anyway, great work !!!
Gr,
Nick
You don't seem to have a problem with cooling your amp....
Those heatsinks, are they Fischer types 😕
If yes, do you have a supplier adres for The Netherlands...
The few amounts of watts that i'll lose don't matter (i hope)
I hope those power failures in Amsterdam aren't caused by you tunrning on the amp (since you don't inrusch limiters) 😉
Anyway, great work !!!
Gr,
Nick
Hi,
No the heatsinks aren't fischer types.
They are surplus and got them from scrap from a transmitter.
I know they seem a little odd, but what the heck..it's cheap. 20 euro per sink(army goods).
And yes, I'm a little scared for the inrush current, but since then..
it's not finished yet!
I bought some coils to reduce (a little) the inrush.
More to come.
Can't wait to finish!
Still waiting for my fets.
Hope santa claus comes around real soon.😉
Greetings.
Remco
No the heatsinks aren't fischer types.
They are surplus and got them from scrap from a transmitter.
I know they seem a little odd, but what the heck..it's cheap. 20 euro per sink(army goods).
And yes, I'm a little scared for the inrush current, but since then..
it's not finished yet!
I bought some coils to reduce (a little) the inrush.
More to come.
Can't wait to finish!
Still waiting for my fets.
Hope santa claus comes around real soon.😉
Greetings.
Remco
- Status
- Not open for further replies.