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GB Pass SONY VFET Version 2 - AL Boards by Tea-Bag

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Tea-Bag

Tea-Bag

Member
Joined 2006
Paid Member
#1
Ok, This is a summarized information for the GB of Sony Version 2 VFET boards, to build the amplifier. Somewhere along the lines Nelson dubbed it "AL" and so it is called that.

http://www.diyaudio.com/forums/pass-labs/276711-sony-vfet-amplifier-part-2-a.html#post4379458

http://www.firstwatt.com/pdf/art_sony_vfet_pt2.pdf

My blog on the Sony VFET2 is here.
http://www.diyaudio.com/forums/blogs/tea-bag/352-sony-vfet-version-2-al-boards-build-blog.html

Here is the front end. 36mm x 175mm

unnamed.jpg

unnamed.jpg


Here is the Output Stage. 54mm x 285mm
unnamed2.jpg
unnamed2.jpg


So, here is a schematic to show what is really missing here, and what is added.

AL_Nelson_mods-CB_mods_VFET-2_3.png
AL_Nelson_mods-CB_mods_VFET-2_3.png

Recommended Parts
Here is an important piece. The boards are ideally connected via the following 2x10x2.54 headers and pins.
PN are
4 - PPPC102LJBN-RC - Digikey - S5563-ND
4 - PBC10DBAN - Digikey PN- S2111E-10-ND
Recommended
4- Front end Heatsinks - 637-10ABPE or similar
TL431ACLPR - Buy extra, if something will short, it will likely be these that die. The TL431B were found not to work well. Use "A" type.

Okay, Rundown of current pricing.
Set of boards 2x FE, 2x OS 35.00 1oz copper FE, 2oz copper OS.
 
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#5
For 2SK
I have a 7.66 and 7.8 available to to trade for the 9.60
For 2SJ
I have a 10.22

I would want to send these for you to measure to see if they match yours enough on your conditions before we horse-trade on anything. For the 2SJ, I might sell you mine as opposed to a trade, as I dont have anything close to 6.54.
 
#8
Okay, I am closing this GB at the end of the day, and ordering boards tomorrow.
Please PM asap if your interested. I intend to have very limited stock of these boards afterwards, and because of the lack of availability of parts, not another GB.
 
#11
Algar, I have some extra boards. I know for you we were trying to swap around some pairs. We should finish up with that process to see if we can get some working ones for yourself.

Also, others may certainly present any readings of extra unmatched pairs here, if you wish to swap with one another as well.
 
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