Tube question - who makes Magnum Dynalab Reference 6922 Cryovalves??

I strongly doubt that any real tube manufacturer ever cryo-treated their product.  In my experience, that is always an option occasionally offered by the better tube vendors.  But I am always willing to learn something new.

lewm:

The tubes (both old/new production) were later cryo'd by outsourced providers.

Have not purchased tubes for years, as I purchased gobs of them 20 years ago, but cryo was an option/upcharge back 15 years (or so).

ATSI (a tube dealer) comes to mind as I purchased Reflektor (sp?) Russian 6922 types from them @ the time.

DeKay

thanks for the help!

"The tubes (both old/new production) were later cryo'd by outsourced providers."

That's exactly what I said too, or was trying to say.