I have checked all options available over there, not helpful or useable size available over there
let me ask again , cut to size as per needs of buyer in brushed finish
I have used these plates and the same profile heat sink you mentioned, to built couple of chassis.
Further if you want any other sizes, buy bulk sheet and get them laser cut.
Further if you want any other sizes, buy bulk sheet and get them laser cut.
looks like it's the only way to get what I was looking for!
I have designed these to get what I need,
I need to locate a local workshop where I can get them done
Module mounting process on heat sink... M3x12mm standoff.
Power transistors clamped with 8mm sq aluminum bar....
Power transistors clamped with 8mm sq aluminum bar....
Back panel with input, output, IEC mains socket and a 60mm cooling fan...
50A Bridge with fan and PSU raised on standoffs... mains filter and soft start, below on the bottom plate.
Ready for hook up wiring...
50A Bridge with fan and PSU raised on standoffs... mains filter and soft start, below on the bottom plate.
Ready for hook up wiring...
One module wired... checked all the voltages, mains, DC Rails, dc offset, speaker protection... all good for testing.
Hi everyone, I just saw the latest amps posted here.
@hydrovac I really like your build; it's very clean, all that's left is to finish it.
@astx I just discovered your work over the past years, with all the versions of your amps you've designed. It's a very impressive amount of work; I'm amazed.
Your latest amplifier must have been very complex to build; you obviously stop at nothing.
@hydrovac I really like your build; it's very clean, all that's left is to finish it.
@astx I just discovered your work over the past years, with all the versions of your amps you've designed. It's a very impressive amount of work; I'm amazed.
Your latest amplifier must have been very complex to build; you obviously stop at nothing.
Circuit, BOM, gerbers, pictures https://www.patreon.com/posts/autentichnye-127626128 , - 150W amp with ClearDrive compensator system
Attachments
You got it! No stop ever, there is always a way to resolve any problem...
Happy DIY
I found it interesting to post my NAP 250 clones from the first one made to the last one, the first being my first DIY creation, we can see the progression.
second same design:
third new design
fourth another design again:
second same design:
third new design
fourth another design again:
Looks good, but just cut the long legs of the power transistors ... BJT may be not a problem, but at least MOSFET's don't like "antennas". 😉
@astx, you're right. I didn't cut their leads because I wanted to keep some length in case I had to modify the assembly or to make desoldering easier.
They're BJTs, but it would be better to cut them now that it's finished.
@kapitiaudio, yes, in the last photo, the amplifier isn't completely finished. The heat-shrink tubing has since been installed , along with more cable ties and the thermistors for thermal protection.
This latest version is more elaborate but took me much more time. I merged the two classic NAP250 PCBs into one. I added a bigun-designed HP protection based on jkp73's schematic and I added a jpk73-designed front-end regulator based on LM337/317s. Finally, there is a hypex softstart/standby/thermal protection module.
They're BJTs, but it would be better to cut them now that it's finished.
@kapitiaudio, yes, in the last photo, the amplifier isn't completely finished. The heat-shrink tubing has since been installed , along with more cable ties and the thermistors for thermal protection.
This latest version is more elaborate but took me much more time. I merged the two classic NAP250 PCBs into one. I added a bigun-designed HP protection based on jkp73's schematic and I added a jpk73-designed front-end regulator based on LM337/317s. Finally, there is a hypex softstart/standby/thermal protection module.
