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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
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Old 24th January 2016, 06:03 PM   #1
Tea-Bag is offline Tea-Bag  United States
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Default GB Pass SONY VFET Version 2 - AL Boards by Tea-Bag

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-...ml#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...uild-blog.html

Here is the front end. 36mm x 175mm

Click the image to open in full size.

Here is the Output Stage. 54mm x 285mm
Click the image to open in full size.

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

Click the image to open in full size.


Here is the built up version showing the connectors, the Aluminum Angle mounting piece. You must be skillfull and patient to drill the aluminum properly. This should not be your first amplifier.

Click the image to open in full size.

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.
Pair of front end boards $15.00
Pair of output boards $34.00

Optional Parts:
4 TO-3 IRF240/9240 can set - two of each = $40
Set of connectors 4-male, 4-female = $18.00
Front end heatsinks set of 4 - $7.00
Dual Rail Power supply boards $25
See http://www.diyaudio.com/forums/blogs...amplifier.html for more info.

Shipping generally starts at $8.00 international or domestic for set of PCBs.

Sign up on spreadsheet and send me a private message with your email and I will send you an invoice.

GB for these will end 2/14/2016 at 11:59PM. This will fall in the middle of the Chinese New Year period so board production afterwards may be a little delayed. They will likely ship in the beginning of March.
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Last edited by Tea-Bag; 25th January 2016 at 08:47 PM.
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Old 25th January 2016, 11:36 AM   #2
Dennis Hui is online now Dennis Hui  Canada
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Hi Tea-bag,

I might have missed them from your blog, but what are the dimensions of the boards?

Thanks,
Dennis
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Old 25th January 2016, 12:19 PM   #3
Tea-Bag is offline Tea-Bag  United States
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Quote:
Originally Posted by Dennis Hui View Post
Hi Tea-bag,

I might have missed them from your blog, but what are the dimensions of the boards?

Thanks,
Dennis
I missed that, and it is an important point. I will add it in to both. Thanks.


AL FE 36mm x 175mm
AL OS 54mm x 285mm
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Old 6th February 2016, 06:52 PM   #4
Algar_emi is offline Algar_emi  Canada
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Hi All. These are my results, and maybe someone can exchange some VFET with me to complete each other kit. I have 4 of each K82/J28.

My results are (at 0.5A)
2SK82:
7.98/7.95 (good pair)
7.86
9.60

2SJ28
7.14/7.16 (good pair)
6.54
10.25

Thanks
SB
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Old 8th February 2016, 02:51 PM   #5
Tea-Bag is offline Tea-Bag  United States
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
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.
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Old 9th February 2016, 01:35 AM   #6
Algar_emi is offline Algar_emi  Canada
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Hi Tea-Bag. Yes I agree it will be safer to measure them in the same condition.
Send me a private email and I'll give you my address. Thanks a lot
SB
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Old 11th February 2016, 06:51 PM   #7
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
THIS GB will close at the end of 2/14/16. Please sign up on spreadsheet and send me a PM if interested. Thank you.
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Old 14th February 2016, 12:10 PM   #8
Tea-Bag is offline Tea-Bag  United States
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
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.
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Old 20th February 2016, 07:17 PM   #9
Algar_emi is offline Algar_emi  Canada
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Tea-Bag your have mail. Thanks SB
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Old 4th March 2016, 01:17 PM   #10
Algar_emi is offline Algar_emi  Canada
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GB  Pass SONY VFET Version 2 - AL Boards by Tea-Bag
Is the GB closed, are we going ahead, are you asking for payment?
Thanks TeaBag
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