12ax7 identification

[japetus]

Pulled these out of an old Japanese amp my buddy bought eons ago and stored away. They read "Gregory" and 12ax7 605 Japan. Any ideas?

 

[SpiderWars]

It resembles a Tungsram but hard to tell from your pic (and the Tungsram pics I googled). I'm not at home to check my Tungsrams.

 

[japetus]

It resembles a Tungsram but hard to tell from your pic (and the Tungsram pics I googled). I'm not at home to check my Tungsrams

 

[SpiderWars]

It looks so close but all the Tungsram pics where I can see the slots on each edge have 2 slots and yours has only 1.

Also, the getter might make a difference so if you could post a pic looking upward into the upper part that is hidden by getter flash, it might help.

 

[japetus]

It looks so close but all the Tungsram pics where I can see the slots on each edge have 2 slots and yours has only 1.

Also, the getter might make a difference so if you could post a pic looking upward into the upper part that is hidden by getter flash, it might help.

 

[japetus]

Whatever it is, put it in my SLX..sounded like shit. Put it in my Bassman, sounds saweeeeet. Edit: I put them back in and it sounds fucking awesome. They sound hi fi.

 

[Nigel]

Whatever it is, put it in my SLX..sounded like shit. Put it in my Bassman, sounds saweeeeet.

Looks like an RCA to me, and would explain why it sounded good in the Bassman.

 

[RedPlated]

I have a bunch of old Mullards, Tungsram, GE, Raytheon, etc, etc....and I still find it hard to ID them by appearance.

 

[japetus]

I put them in my "Mini Larry"...sound killer in it.

 

[psychodave]

My guess is it’s a Mazda 12AX7. Pics aren’t the best.

 

[Racerxrated]

My guess is it’s a Mazda 12AX7. Pics aren’t the best.

Are those similar to Mullards? I have some Jap Mullard clones; great sounding tube. They have a different 'seam' on the top of the tube...I thought they were built using real Mullard tooling.

 

[psychodave]

Are those similar to Mullards? I have some Jap Mullard clones; great sounding tube. They have a different 'seam' on the top of the tube...I thought they were built using real Mullard tooling.

Yeah. I’ve know them to be really close to Mullard. They sound great. I have a few, but they are a bit microphonic.

 

[psychodave]

Thinking some more, I have a feeling this is just a rebranded euro tube. I thought it was possibly a Matsushida, but the getter is different. I was thinking it's a Mazda based on the plates, but without having it in my hand, I really cant tell. I'm super curious though.

 

[japetus]

I send some pics to some other "tube dudes" and they say they have no idea. They sound great, Ill just keep them and use them.