CurtPalme.com Home Theater Forum

[Nashou66]

Register to remove this ad. It's free!

Well both radiance Supplies are done. With a little help from some red wine.


EDIT: The latest build PS has been powering the Lumagen HDQ for an hour and 10 minutes and part of the heat sink right where the chip is mounted is at 50c. So far so good. The chip has a rating of 175c. So I hope this is ok. Well below the 80c I got on the other Heart sink after 30 minutes.

Nashou

[HK-Steve]

Looks like a Pinot Noir, from where????

I might get you to build one for me the way things are going with the OEM power suplies.



Congrats on the build and test. temps seem good.


Cheers

[CxTurbo]

Nice, Nash!

Glad it is all starting to come together for you.

I was hoping to use an Antek Inc toroid for mine. But, While putting together parts for some MY_Ref mono blocks I went to look for some 300VA 24-0-24's. It looks like Antek had a fire and will be out of the game for a bit. Oh, well I suppose I can wait or I will look on eBay for some R cores for the amps and the Sigma. I could always do Piltron xformers as well but they are normally 2-3 times the price as Anteks although the quality is top notch and they are located in Toronto.

James

[Nashou66]

[HK-Steve]

Wow, those temps do seem very high, seems like a stressed supply temp wise.


Cheers

[Nashou66]

I think so as well. But AMB says its fine and you really only need to worry about the Mosfet's.

I wonder if there might be another diode I could use there that has a higher temp rating just incase.

Athanasios

[HK-Steve]

which diodes are you using? MUR820's ???

[Nashou66]

Yes.

And they are too close together to use any sort of heat sink worth while.

Nashou

[Nashou66]

Ok here is how I plan to put these into the chassis. I want to drill two holes into the sides and into the heat sinks and mount one on each end of the chassis. The one end of the PCB board slides into the Slots of the corner members of the chaises. The other end of the heat sink will be also held up by a piece of aluminum Rod. I might actually get some more heat dissipation through the side of the chassis this way. The Transformer might fit under one of the boards but I think I might keep it in the middle to keep any Magnetic noise from the power supplies. There is not enough room to put a cover over the Xfrmr to shield it.

Then I will put the 12 volt power supplies for my TV ones in the middle. there should be enough room for the total of 4 PCB boards. those will have the On board heat sinks since they barely draw 1 amp.

I will have to cut the top to go around the heat sinks as it slides in at one end. You have to remove the ends to get the top off by sliding it out. So my plan is to mount the PS's except for the one on the end I need to remove to put the top on, and slide the top on and then put the side plate with the heat sink screwed to it with PS onto the chassis. then screw it down. Hopefully I wont have to open it up at all

I think that should work and look nice. The heat sinks will come out the top so the heat will not affect the other PS's.

The wiring of the chassis will be another logistical issue I'll deal with after.

I am wondering if I should use metal cutting scissors or a metal saw for the top cuts. its thin Aluminum about 1mm thick. I will probably use some rubber gasket on the cut edges to butt up against the exposed heat sink. Or maybe try to cut slits on the ends of the heat sink that the top will touch so they actually slide into the heat sink. That will be a tough
work of precision to do tho.

But this is fun I have to say.

And who said for me to just use a PC power supply!?!

Nashou

[HK-Steve]

Looks great so far, keep us posted on your progress.


Cheers

[Nashou66]

So I'm looking at layout options and I think I'm going to go this Route . My only concern is the Transformers and any magnetic fields they might produce placing metal near the plates seemed not to have any magnetism so I think Im ok. They absolutely have no Hum, These Harmonds are quiet .

So here are the temporary layout pics. All 5 power supplies.

I figure keeping the Transformers away from the mosfets( on the heat sinks) is the best way to go. And if there is noise I can easily flip the PCB's around.

Athanasios

[AnalogRocks]

Why not put some copper sheets around the transformers to isolate and noise and shunt it to ground?

[AnalogRocks]

Why not put some copper sheets around the transformers to isolate and noise and shunt it to ground?

[Nashou66]

[HK-Steve]

Looks good, will be a heavy sucker once finished.

Will be interested in your impressions once hooked up properly, as I want an upgrade to my original XS+ supply.


Cheers

[Nashou66]

[Nashou66]

I think the XS draws less current than the HDQ as the temp on the heat sink fins is only 21c. I cant measure from the flat side of the heat sink since its mounted inside the chassis. But i am going to watch Skyfall for the first time.

Lets see how it holds up.


Athanasios

[Nashou66]

I just watched Skyfall and all is well. Heat sink is just warm to the touch.

I did not really look for an improvement of the image but Knowing its not a SMPS and a linear is all i need to know.

Athanasios

[stridsvognen]

Well maybe, and just maybe there could be some improvement in SQ, not having those SMPS connected, but most BD players projectors and other surround stuff is full of SMPS.

So im not sure if less SMPS really do any difference.. You tell us.

Nice work.. Will you start production soon, and trow one in for free with a set of bellows..?

[Nashou66]

[Nashou66]

Started to add the components. Cutting out the rectangular hole for the IEC plug/switch combo was a pain. I had to drill the entire perimeter of the template I made and then cut it out with a utility knife and file down the bumps.

But its coming along.

A few pics.






Nashou