Hi, what is the size of the heatsink you are currently using in your chassis for AJ ?
I suggest using ~1/4 inch spacers to put some space between the heat sink and the steel chassis side, so that the flat part of the heat sink can cool and not be insulated by the steel.
The black steel pressing is one side of a 4U 19" rack case.
The heatsink is approx 300mm wide x 180mm tall with fin height about 60mm.
The heatsink is approx 300mm wide x 180mm tall with fin height about 60mm.
Better propective
This photo might better show the relative size of the heatsinks.
The case is a 4U chassis, the toroid is a 500VA unit.
The two big caps are 22000uF Audio Grade caps then feeding a CRC filter with 10 x 4700uF caps.
This amp is only intended to operate as the HF amplifier in a tri-amp setup.
This photo might better show the relative size of the heatsinks.
The case is a 4U chassis, the toroid is a 500VA unit.
The two big caps are 22000uF Audio Grade caps then feeding a CRC filter with 10 x 4700uF caps.
This amp is only intended to operate as the HF amplifier in a tri-amp setup.
Attachments
how many fins...
Here is a shot of my newly constructed Aleph J.
The heatsinks are pretty small; each side assembly adds to about 8x10 inches of fins. The heavy aluminium brackets probably help...
I played it recently for 4 hours driving 4 Ohm speakers (KEF 104/2) straight out of the CD player and though it got hot it never got past the 5 second touch rule.
Perhaps I am just lucky so far but I might have done right by keeping the fins up high for good air flow; it was my whole intention with the tiered nature of this scrapyard build.
I'd say be smart and fearless. If it gets too hot you'll have to rebuild. Just don't leave the room while you do your testing
Here is a shot of my newly constructed Aleph J.
The heatsinks are pretty small; each side assembly adds to about 8x10 inches of fins. The heavy aluminium brackets probably help...
I played it recently for 4 hours driving 4 Ohm speakers (KEF 104/2) straight out of the CD player and though it got hot it never got past the 5 second touch rule.
Perhaps I am just lucky so far but I might have done right by keeping the fins up high for good air flow; it was my whole intention with the tiered nature of this scrapyard build.
I'd say be smart and fearless. If it gets too hot you'll have to rebuild. Just don't leave the room while you do your testing
Attachments
I love it!!
Congratulations on a successful build!
The blue glow reminds me of Cherenkov Radiation - Cherenkov radiation - Wikipedia, the free encyclopedia
Congratulations on a successful build!
The blue glow reminds me of Cherenkov Radiation - Cherenkov radiation - Wikipedia, the free encyclopedia
Wow, thanks 6L6! You made my build possible with your heavy contribution to the Aleph J board projects and your personal help to me along my build path. Now you continue to educate me in distinguished vocabulary!
Cheers!
Cheers!
Looks lovely but I've been getting comments that my heatsinks are too small and they dwarf yours.
may be 'smallish', but might work
could depend on your actual measured supply voltage
room temperature matters too
and maybe just don't go crazy on high bias 😉
Your sinks are 56Kmm^2 mine are around 51. I may have more mass if you include the brackets the sinks mount to. Total mass is about 5.3Kg / side.
What this says to me is you should be alright on an Aleph J if you get good air flow - at least that is my experience 😉
NSP, looks very nice!!! and familiar 😀
That's more then adequate heatsinking for a F5.
I like the powder coating, isn't it too shiny?
Walter
That's more then adequate heatsinking for a F5.
I like the powder coating, isn't it too shiny?
Walter
Here is a shot of my newly constructed Aleph J.
The heatsinks are pretty small; each side assembly adds to about 8x10 inches of fins. The heavy aluminium brackets probably help...
I played it recently for 4 hours driving 4 Ohm speakers (KEF 104/2) straight out of the CD player and though it got hot it never got past the 5 second touch rule.
Perhaps I am just lucky so far but I might have done right by keeping the fins up high for good air flow; it was my whole intention with the tiered nature of this scrapyard build.
I'd say be smart and fearless. If it gets too hot you'll have to rebuild. Just don't leave the room while you do your testing
The end result looks very nice, like the blue light coming from it...
Enjoy listening to it !
Walter
