Schiit Valhalla Tube Rolling thread.

[Kingrex]

Your tech?

Seems kinda peculiar that at least 1000 people on here use or have used adapters for other tubes , and 1 person is hanging in the balance from audio nirvana.
To each their own. I'm glad I make my own decisions in life

I think not. I doubt the tube you are hailing is some sort of audio grail of tubes. Maybe, but I doubt it. And adding crap chinese tube sockets with nebulous material quality as well as 3 additional connections points made up of dissimilar metal and solder connections inline with the most sensitive signal path in the preamp???? Not a good idea.

It is my understanding that a 12AT7 has different electrical characteristic than a 6922. I have no idea how an adapter would make up for it. So yes, I would ask a friend/consultant who is an electronics engineer what his thoughts are before I started willy nilly swapping possibly incorrect tubes into my equipment based upon some forum mambers advise on the internet. Sorry to be snarky, but I always validate what I hear on the internet. I started my business because what people tell you to do is many times very wrong and very dangerous.

 

[Kingrex]

Here is an online comment. I assume my tech would say about the same.

ECC88/6922/6DJ8 do indeed have a lower mu of 33, and hence amplification factor than 12AT7's (mu = 60) and their variants. However, there are other issues such as proper biasing of the tubes since they do operate ideally at different currents and plate voltages, along with different filament voltages and currents as well. At 6.3V filament voltage, the 6922 requires 365mA while the 12AT7 requires 300mA. The 12AT7 can also work with a 12.6V filament source but only requires 150mA.

The simple answer is no. You would have to redesign your tube preamp gain stage.

 

[Guidostrunk]

I think not. I doubt the tube you are hailing is some sort of audio grail of tubes. Maybe, but I doubt it. And adding crap chinese tube sockets with nebulous material quality as well as 3 additional connections points made up of dissimilar metal and solder connections inline with the most sensitive signal path in the preamp???? Not a good idea.

It is my understanding that a 12AT7 has different electrical characteristic than a 6922. I have no idea how an adapter would make up for it. So yes, I would ask a friend/consultant who is an electronics engineer what his thoughts are before I started willy nilly swapping possibly incorrect tubes into my equipment based upon some forum mambers advise on the internet. Sorry to be snarky, but I always validate what I hear on the internet. I started my business because what people tell you to do is many times very wrong and very dangerous.

it's cool bro. I take it you never clicked on the adapter(not chinese) link and have never stepped outside of the required variants.
Just continue what you're doing. No need to consult.

I would have never suggested said tubes and adapters if it was going to ruin your gear.
FYI , Mike Moffat was the one who started the adapter madness on here with the WE396a(non compatible without adapter). Him being one of the owners of Schiit , I trust his judgment.

Cheers!

 

[bcowen]

Seems kinda peculiar that at least 1000 people on here use or have used adapters for other tubes , and 1 person is hanging in the balance from audio nirvana.
To each their own. I'm glad I make my own decisions in life

Aw, c'mon man. We all know you're actually a tech that's parading around in normal people clothes.

Oooops....if I wasn't supposed to say that publicly, please berate me appropriately.

 

[Guidostrunk]

Aw, c'mon man. We all know you're actually a tech that's parading around in normal people clothes.

Oooops....if I wasn't supposed to say that publicly, please berate me appropriately.

 

[jonathan c]

Seems kinda peculiar that at least 1000 people on here use or have used adapters for other tubes , and 1 person is hanging in the balance from audio nirvana.
To each their own. I'm glad I make my own decisions in life

….perhaps reaching audio nirvana involves adapting to using adapters……

 

[jonathan c]

Aw, c'mon man. We all know you're actually a tech that's parading around in normal people clothes.

Actually, it’s this:

 

[Guidostrunk]

….perhaps reaching audio nirvana involves adapting to using adapters……

HAHAHAHAHA My drink just went through my nose! How's that for adapting?

 

[Ripper2860]

When you can snatch the 12AT/U7 from my hand, it will be time for you to leave, grasshopper.

 

[Guidostrunk]

I really wasn't trying to piss him off. Lol.
We all try and find the one(HG) and help others from spending $250 *cough* on a subpar tube. We've been down that rabbit hole and it gets quite expensive. I remember those guinea pig days

 

[Guidostrunk]

Hell I remember being on this particular thread maybe 6 years ago all excited that I bought my first pair of 65 Siemens CCa($375)

 

[Guidostrunk]

Holy crap. 2015 was 7 years ago
So yeah more like 7 years ago on this thread.

 

[jonathan c]

I really wasn't trying to piss him off. Lol.
We all try and find the one(HG) and help others from spending $250 *cough* on a subpar tube…

Wait until he meets Bangybang! …

 

[Guidostrunk]

Wait until he meets Bangybang! …

Nothing but the best

 

[jonathan c]

Nothing but the best

If he passes that test ===> menifee ===> wege_high_tubes ……