DIY Purifi Amp builds

[JimB]

You could read some of the earlier posts from others who have done more of their own methods for that.

 

[zappa]

...
That is because the /AMPON line is being controlled by the SMPS (which I prefer).
...

Hi,
How the SMPS control the /AMPON (I mean what exactly it is doing) ?
Thanks in advance ?

 

[JimB]

Hi,
How the SMPS control the /AMPON (I mean what exactly it is doing) ?
Thanks in advance ?

/AMPON means NOT amp on. Leaving that input open means the amp is not active - it is in standby. When the SMPS1200 is on and it's outputs are good, it pulls that line low (near ground) which tells the amp it should be active (not in standby). When you turn the SMPS off, it immediately releases that line, telling the amp to go to standby while power drops. This should manage the amp safely, telling it when to be active or not, as power comes on and goes off.

 

[LarsS]

Slowly by slowly, soon ready ...

 

[JimB]

View attachment 94141

Slowly by slowly, soon ready ...

And... WHAT is hiding behind that little cooler???

 

[Count Arthur]

And... WHAT is hiding behind that little cooler???

The flux capacitor.

 

[JimB]

The flux capacitor.

Or...

 

[LarsS]

And... WHAT is hiding behind that little cooler???

 

[Matias]

Pretty cool build.
Although I feel the notion of class D needing extra cooling to be exaggerated. Specially Purifis they run cooler than nCore, which already is quite cool.

 

[LarsS]

Pretty cool build.
Although I feel the notion of class D needing extra cooling to be exaggerated. Specially Purifis they run cooler than nCore, which already is quite cool.

If you had attended one of my kids parties you’d think otherwise. Using all security measures in fun corona distraction.

From Purifi’s doc: ”Continuous output power depends on properties of the thermal system. ”

Edit: Built a pair of nCores 2013, now long gone

 

[boXem | audio]

If you had attended one of my kids parties you’d think otherwise. Using all security measures in fun corona distraction.

From Purifi’s doc: ”Continuous output power depends on properties of the thermal system. ”

Edit: Built a pair of nCores 2013, now long gone

Since you are all out on cooling, may I suggest sanding all surfaces where thermal transfer will occur? Paint/anodisation are pretty bad at transmitting heat.

 

[sloth_kwj]

View attachment 94155

Where did you order the case?

 

[somebodyelse]

View attachment 94155

The most OTT cooling solution for a Pi 4 yet

 

[LarsS]

Global warming & kids parties prepared amp ... ;-)

 

[NTSOS]

Not in a box yet because I was anxious to just get her up and running, so be kind, yes it's crude and sloppy but it is my first ever DIY amp build. I have the aluminum plates and screws to complete the box, just received the drill bits for cutting the input and vent holes, and so I will complete everything over the next day or two (including tidying up and twisting/shielding all of the cables, replacing the quick connects with ones that are fully insulated, changing out the bare end of the ground wire to an insulated ring, and using color-coded cables instead of the all-green). I most certainly welcome criticism and input from those more experienced who spot anything egregiously out of place.
View attachment 45858 View attachment 45859

Hi.....where do you get the correct pins to insert into the plastic connector for the 220/120 J3 jumper? Thanks.

 

[NTSOS]

If you will be using it in a country with 115VAC mains voltage, watch out for getting/making a jumper for the J3 of the SMPS1200 - it is not included from Hypex.

Hi Jim.......do you happen to know where I can get the correct pins to insert into the plastic connector to properly jump the J3? Thanks man!

 

[LarsS]

Where did you order the case?

From HDPlex.com

 

[NTK]

Hi Jim.......do you happen to know where I can get the correct pins to insert into the plastic connector to properly jump the J3? Thanks man!

You can get it from Digi-Key (scroll down to the "Associated Products" for the crimp sockets or pre-made jumper cables)
https://www.digikey.com/en/products/detail/jst-sales-america-inc/VHR-2M/9924200

Or get them from Ghent's eBay store.
https://www.ebay.com/itm/5-sets-JST...868398&hash=item4aff3bcdf6:g:gMMAAOSw~oFXOK8z

 

[NTSOS]

You can get it from Digi-Key (scroll down to the "Associated Products" for the crimp sockets or pre-made jumper cables)
https://www.digikey.com/en/products/detail/jst-sales-america-inc/VHR-2M/9924200

Or get them from Ghent's eBay store.
https://www.ebay.com/itm/5-sets-JST...868398&hash=item4aff3bcdf6:g:gMMAAOSw~oFXOK8z

Hi NTK......wow, terrific......thank you so much!

 

[JimB]

You can get it from Digi-Key (scroll down to the "Associated Products" for the crimp sockets or pre-made jumper cables)
https://www.digikey.com/en/products/detail/jst-sales-america-inc/VHR-2M/9924200

Or get them from Ghent's eBay store.
https://www.ebay.com/itm/5-sets-JST...868398&hash=item4aff3bcdf6:g:gMMAAOSw~oFXOK8z

Still a bit long, but...
https://www.digikey.com/htmldatasheets/production/1917131/0/0/1/asvhsvh16k51-drawing.html