12ax7 made in korea

Guest · Post by **Guest** » Fri Jun 17, 2005 7:12 pm

I have a 12ax7 and all it says is made in korea. what manufacturer could this be?

Dai H. · Post by **Dai H.** » Sat Jun 18, 2005 3:29 am

got a pic?

thunder970 · Post by **thunder970** » Sat Jun 18, 2005 9:07 am

no, but I'll post one in a day or so. thanks

Guest · Post by **Guest** » Sun Jun 19, 2005 12:04 am

never mind, the damn tube was bad. I do have a zenith tube made in holland that tests good, but when it first gets power it flashes bright then it goes normal. whats up with that. I think I need to just trash all my OLD tubes and be done with it.

Dai H. · Post by **Dai H.** » Sun Jun 19, 2005 3:40 am

the flashing of the heaters is perfectly normal in some tubes. IIRC there was a technical explanation on the Roccaforte site.

thunder970 · Post by **thunder970** » Sun Jun 26, 2005 6:18 pm

I'm glad I didn't trash that zenith

It is killer in my marshall. And thanks for the info. they say amperex and mullard flash at startup if the filaments are not equal in tempature, but once they balance out it settles down......which don't take long "flash" I just don't know if all do it or just some amperex/mullards