[Pondoro]

Anyone have any experience with 12au7 GE triple mica 1950’s in the Vali 2+. I know bcowen has some dislike for GEs but I’ve found these to be incredibly musical. With an adapter of course.

How do you adapt them? Do you run them at 6 volts or supply 12 somehow?

 

[jonathan c]

An adapter such as the Pulse Tube Store 12Axx —> ECC88 will allow for the use of a 12AU7 tube in a socket designed for a 6922 / 6DJ8 tube. The adapter ‘rewires’ the 12-volt 12AU7 to make it a 6-volt tube such as the 6922.

 

[Tensen]

12au7 can run at either 6 or 12v.

The 12AU7 is a miniature medium-mu twin triode. This tube finds use as a phase-inverter/splitter in push-pull amplifier circuits in ac/dc radio equipment and in many diversified applications such as multivibrators or oscillators in industrial control devices. The tube is quite pokey and sections can even be connected in parallel to create a power amp with enough current to drive a pair of headphones or even a guitar speaker. A centre tapped heater permits operation of the tube from a 6.3V or a 12.6V heater supply. The tube requires a noval nine-contact socket and may be mounted in any position.

 

[ledzep]

Rather than trawling 400 pages, can anyone confirm the Treasures CV181-Z with the vali 2, i guess it needs a bit more juice than the standard 6SN7

 

[InvisibleInk]

Tube Depot is having a sale today. For example, I have my eye on this for my Schiit Vali 2:

https://tubedepot.com/products/amperex-6922-pq-usa-gold-pin

 

[tafens]

Rather than trawling 400 pages, can anyone confirm the Treasures CV181-Z with the vali 2, i guess it needs a bit more juice than the standard 6SN7

The CV181-Z is a 6SN7 type tube despite its name. They probably used the CV181 name because of some marketing purposes because it has the same heater voltage and current as a regular 6SN7 (6.3V/0.6A) while the original CV181 does not (it pulls 0.95A).

I’m currently using a 6SN7 in my Vali2+ with no problems.

Here are some specs on the CV181-Z (scroll down the page below the images): https://www.china-hifi-audio.com/en...81-z-vacuum-tube-pair-6sn7-6n8p-premium-p-629

 

[ledzep]

The CV181-Z is a 6SN7 type tube despite its name. They probably used the CV181 name because of some marketing purposes because it has the same heater voltage and current as a regular 6SN7 (6.3V/0.6A) while the original CV181 does not (it pulls 0.95A).

I’m currently using a 6SN7 in my Vali2+ with no problems.

Here are some specs on the CV181-Z (scroll down the page below the images): https://www.china-hifi-audio.com/en...81-z-vacuum-tube-pair-6sn7-6n8p-premium-p-629

Thanks for that, got hold of vali 2 at a bargain price due to top cover being scratched so just sanded it down and resprayed it satin black with a matching dial, so now just looking at some half decent tubes to have a roll with, keeping the budget under £100 per tube so things don't get out of control ( we all know how easy that is ) want to sample the vali for a bit before climbing the ladder higher.

 

[Neweymatt]

Thanks for that, got hold of vali 2 at a bargain price due to top cover being scratched so just sanded it down and resprayed it satin black with a matching dial, so now just looking at some half decent tubes to have a roll with, keeping the budget under £100 per tube so things don't get out of control ( we all know how easy that is ) want to sample the vali for a bit before climbing the ladder higher.

That black with black volume pot looks fantastic!!

If you're in the UK ( or even if you're not ) Billington have a huge selection to choose from, and are great to deal with:
https://web211.secure-secure.co.uk/tube-and-valve-electronics.co.uk/default2.asp

 

[Pondoro]

Thanks for that, got hold of vali 2 at a bargain price due to top cover being scratched so just sanded it down and resprayed it satin black with a matching dial, so now just looking at some half decent tubes to have a roll with, keeping the budget under £100 per tube so things don't get out of control ( we all know how easy that is ) want to sample the vali for a bit before climbing the ladder higher.

A 6SN7 with an adapter improved my Vali noticeably.

 

[ledzep]

That black with black volume pot looks fantastic!!

If you're in the UK ( or even if you're not ) Billington have a huge selection to choose from, and are great to deal with:
https://web211.secure-secure.co.uk/tube-and-valve-electronics.co.uk/default2.asp

Yeah I'm in the UK, thanks will check them out.

 

[ledzep]

A 6SN7 with an adapter improved my Vali noticeably.

Adaptor ordered

 

[ledzep]

Does anyone know what the forward voltage is on the led ( before I take the lid off) thinking of swapping out for a orange one.

 

[Pondoro]

Adaptor ordered

You need a tube saver for the smaller tube socket, that extends the adapter above the top of the case. So, from the bottom: Vali socket on the board, then tube saver, then adapter, then the 6SN7 tube.

 

[ledzep]

You need a tube saver for the smaller tube socket, that extends the adapter above the top of the case. So, from the bottom: Vali socket on the board, then tube saver, then adapter, then the 6SN7 tube.

Already got some of those, although I'm still not sure whether to machine out a slightly bigger hole.

 

[Mr Trev]

Already got some of those, although I'm still not sure whether to machine out a slightly bigger hole.

If that's a risk you're willing to take, I'd recommend it. In my setup, I've found stacking adapters tend to be noise prone. Or drop @Deyan a PM. He's made myself and others custom adapters that can fit the Vali2 opening without needing a socket saver (there's a few pics here showing them)