“Insides” of tubes


Hi all,

Weird question here but is it possible for the innards of power tubes to be aligned differently? I bought 4 new Genalex PX300B tubes for my monoblocks. In one amp the innards of the tubes are aligned the same way. So the center plate is oriented the same way.  For the other amp one of the tubes’ center plates is about 25 degrees off center to the other tube.  I have verified that all of the tubes are aligned correctly in terms of the pins.  The amplifier sounds fine. But this just seems weird to me...

dgaylin
They are made in Russia. Don’t expect too much when it comes to quality control. Or maybe different production runs. If they measure strong to spec that is all I would expect.

They wouldn’t dare sell US disjointed tubes on purpose would they? No reason to think they would.
As long as the outboard pins correspond to the same leads inside the glass then all is well. Otherwise the plate orientation to the glass doesn't matter, the glass is cylindrical after all. 
There is thin lead wires coming out of the bottom of the glass tubes that are threaded into the hollow pins during assembly. After getting the wires in a glue is used to join the base to the glass and the pins are soldered. It sounds like someone wasn't paying attention to the alignment very carefully. Shouldn't harm the operation but if it bugs you.............
BillWojo
I only get the laser trimmed tubes. Sonically superior to all others. Made by hand in Estonia.

wolfie62
89 posts08-25-2020 9:30pmI only get the laser trimmed tubes. Sonically superior to all others. Made by hand in Estonia.

That good..All others.. LOL crack me up.. Estonia? Mercy...

The thing people say...Handmade valves have been around for quite a while, The Italians, French, and Brits, have been at it for a LONG time.
Where do you think the Estonians learned how to do it, Certainly not Estonia, Russia, or China. You ever listen to Russian music, makes me want to go, dig a ditch and jump in it.

Job market is slim in Estonia, work in Russian Gulag, or make handmade, valve. Truly a land of limited opportunity.

Don't get upset now, just sayin'

Regards