Sony vFET Amplifier Part 2

[Soundhappy]

I am building. I worked on my case last week. I bought the heatsinks almost a year ago for this build. It is what is called redneck engineering in the deep south but it will be functional. I should start stuffing boards next week.

I am putting the V-fets on top of the brace per the V-fet #1 article with the board on the underside of the brace. I believe this is the correct way. The brace is wider on one side that the the other. Does anyone know which side goes up. I figured I will figure it out from the pinouts of the V-fets and traces on the boards if no one speaks up. Being that the pins of the V-fets only line up one way it should be easy enough figuring it out. But advice and experience is always welcome.

🙂

 

[vanofmonks]

painstakingly hand-matched and sequentially arranged over 1,000 VFETS... Calling that a legendary effort would be an understatement 🙂

Can we officially name it:

The Legendary Beast of a Thousand VFETS

I think that would only be appropriate, and it does still need a name right? 😀

 

[Nelson Pass]

Maybe this picture will help.

😎

 

[vanofmonks]

Any chance of getting Keratherm insulators made for the bracket to heatsink interface and the VFETS?

 

[Soundhappy]

Maybe this picture will help.

😎

Thanks Mr Pass

Yes will help a lot 🙂

 

[Soundhappy]

Any chance of getting Keratherm insulators made for the bracket to heatsink interface and the VFETS?

If not too late try this link :

http://www.diyaudio.com/forums/group-buys/285807-ic-keratherm-86-82-3-insulators.html

Good luck 🙂

 

[dady]

There are no big power heating for dissipation, use mica and grease.
It's works since long time ago.

 

[vanofmonks]

If not too late try this link :

http://www.diyaudio.com/forums/group-buys/285807-ic-keratherm-86-82-3-insulators.html

Good luck 🙂

Yeah, I'm in that one, but looks like it died. Also, no sheet for the bracket to heatsink interface.

 

[noelectrix]

no sheet for the bracket to heatsink interface.

guess you don´t need any, just grease

stefan

 

[wdecho]

Many thanks Nelson, a picture is worth a thousand words.

 

[noelectrix]

Many thanks Nelson, a picture is worth a thousand words.

a VIDEO with the little vfet playing on nelsons cathedrals would be (useless because of video quality) but a phantastic entertainment : )

stefan

 

[bk856er]

Maybe this picture will help.

😎

Can someone please share the PN for the Q5/Q6 heatsink in the pic?

BK

 

[wdecho]

That would be nice. The heatsinks I ordered are not that big. I forgot to get them actually when I placed my order online at Mouser and quickly called them and had some put on the order before they started filling it. I then ordered some on Ebay that are somewhat larger but not as big as the ones Nelson is using. With some diligence someone should be able to locate them.

 

[Soundhappy]

Also, no sheet for the bracket to heatsink interface.

Oops 😀
Keratherm are available in biger square foil and you can cut to dimmension you need for perfect thermal bracket to heatsink contact.

Thermally conductive film 0.25 mm 6.5 W/mK (L x W) 190 mm x 190 mm Kerafol from Conrad.com

http://www.produktinfo.conrad.com/d...en-WAERMELEITFOL_86_82_ROT_190X190X0_25MM.pdf

 

[Nelson Pass]

Can someone please share the PN for the Q5/Q6 heatsink in the pic?

Aavid part. Digikey SKU is: HS193-ND

😎

 

[bk856er]

Aavid part. Digikey SKU is: HS193-ND

😎

Many thanks NP!

Equivalent Mouser PN: 532-551002B00G

BK

 

[Soundhappy]

Aavid part. Digikey SKU is: HS193-ND

😎

I just was ask for the same and get response thx 😀

...and for diyers who buy from Mouser

http://www.mouser.com/ProductDetail...ha2pyFadujD4TGsc%2bcoRTFgG9XrnVTibqlu45L/wkA=

 

[bk856er]

Another part question. Are P1-P4 Bourns single or multi-turn? Is there a preferred component series or PN?

BK

 

[gwrskien]

The ones in the pic in post #1608 look like Bourns 3386 series, single turn i think. Bourns 3296w are multi turn, and used in other Pass amps like F5t( 652-3296W-1-502LF at Mouser). Remember to check footprint if it fits.

 

[bk856er]

The ones in the pic in post #1608 look like Bourns 3386 series, single turn i think. Bourns 3296w are multi turn, and used in other Pass amps like F5t( 652-3296W-1-502LF at Mouser). Remember to check footprint if it fits.

Excellent - thank you. Seems to be the Bourns 3386P single-turn, with P designating the appropriate pin pattern.

Someone will correct me if that info is wrong.

BK