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

[cosmo61]

Maybe you can find something here!

Aluminium T-Profile - Alu T-Profile

 

[Telstar]

Maybe you can find something here!

Aluminium T-Profile - Alu T-Profile

Excellent
Which size do you recommend to go with the diyaudio PCBs?

 

[cosmo61]

Excellent
Which size do you recommend to go with the diyaudio PCBs?

In my build i used 50x50x4 mm.

 

[bkdog]

Nice build cosmo61! Is that the store 4U chassis? Do the sinks get very hot?

 

[cosmo61]

Nice build cosmo61! Is that the store 4U chassis? Do the sinks get very hot?

yes it is the 4U Chassi.
I have set the bias little higer around 1,25A and got about 50 degrees on the heatsink.

Buy the way it's a it's wonderful sounding amp, my favorite.

 

[bkdog]

Many thanks!

 

[RainfallSky]

Would be cool to Group Buy nice milled heatsinks for Tea-Bag AL boards like those Nelson did for one pair DIY Sony VFET.
This probably will not happen. )

For now I am out of two 2SK82's to make this two pair version (most critical part).
So thinking to maybe first make DIY VFET amp with Nelson's boards.
Or make this one with one pair per channel and add a second pair in optimistic future.

Can anyone recommend 20 pin. connectors for AL boards from a Mouser store list?

 

[Tea-Bag]

Can anyone recommend 20 pin. connectors for AL boards from a Mouser store list?

I was not able to use anything from them. The connector pins I sell are from Digikey. The 90degree male pins they have to custom cut.

 

[BDP]

Okay, boards are ordered. I will have some extra available if you are interested, Private Message me.

Sent PM

 

[Tea-Bag]

Sent PM

I did not get anything. Not yet anyways

 

[BDP]

Thanks for the reply,

Resent

Anyone care to comment on VFET matching of 0.4 volts?

BDP

 

[Tea-Bag]

Thanks for the reply,

Resent

Anyone care to comment on VFET matching of 0.4 volts?

BDP

I am not sure if anyone else has better insight. It would work. I think we know that one set will run warmer than the next at a fixed applied (negative) bias voltage. Sonically I am not sure if this is deterimental or not, or better than a single set for sound and output power. If no decent answer here, I would ask on Sony V2 build thread. Nelson should be able to guide best. I know on the production units he used a very small source resistor just to check current draw on each unit. This board is not adapter to do that

 

[BDP]

Received my boards.

Thanks

 

[manamanam]

Hi All,

Has anybody spare output boards ?

 

[Brzzl]

Hey there,


I know it has been quite some time since this thread was opened, but does someone by any chance still have the PCB's?



Thanks,
Brzzl

 

[Junm]

Me too, i'm looking for a pair of boards...

 

[sorenb]

I do have boards from this GB that I want to let go, PM me

 

[Bones13]

I have a set of TeaBag VFET boards, and the connector inline pins. I’ll sell to USA buyer, shipping overseas is problematic.

 

[arky]

is it a right place to ask how to connect the boards for bridged configuration? I understand there's no R46 implemented, so general approach of BA3bal front end connection is not applicable?