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Old 6th May 2021, 01:07 AM   #5761
AVWERK is offline AVWERK  United States
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I have to agree with Eric on those sinks, they don’t have enough surface area to do the job.
You will have to fan cool them which is not a big deal in 2021
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Old 6th May 2021, 08:07 PM   #5762
Variac is offline Variac  Costa Rica
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(moderator comment) Let’s not insult the Chinese here. I’ve seen a lot of much thicker and prettier and probably more expensive extrusions from China. As members are mentioning, your heatsinks actually DO look a bit inadequate. Certainly I would be concerned that the back plate is much too thin to efficiently distribute heat longer distances. And given the number and dimensions of the fins, the heat would have to travel quite far to involve enough fins. One solution might have been to have wires to extend the transistors from the PCB to various shorter lengths of heatsink stacked right next to each other, like one at each corner of each PCB. Unfortunately your transistors are already mounted although it would certainly be possible to remove them. I know from painful experience!

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Originally Posted by amplidude View Post
Guess it all comes to surface area, I'm confident it will work, it's not cheap China profiles
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Old 6th May 2021, 08:13 PM   #5763
Zen Mod is offline Zen Mod  Serbia
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point is - even if not from China, heatsinks are inadequate

remedy - buy some proper sized Chinese heatsinks

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Old 7th May 2021, 07:03 AM   #5764
gadut is online now gadut  Indonesia
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insulting chinese is an old 90's joke. i will choose this heatsink "made in china" due to it's massive size and cheap price (let's put away trade mark issue for a while)

https://m.aliexpress.com/i/32831420344.html
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Old 7th May 2021, 06:37 PM   #5765
Soundhappy is online now Soundhappy  France
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Default Made with and for Friend Xavier

I guess Diyers are busy with the build of this new VFet SE amplifier Thanks to Mr. Pass & Team's
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Old 7th May 2021, 08:36 PM   #5766
peppennino is offline peppennino  Italy
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Old Today, 06:07 PM   #5767
Soundhappy is online now Soundhappy  France
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Father of friend Xavier does want to borrow
for music listening evenings
and discovering for the first time this Pass class A & Vfet amplifier.
Cool
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