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

Think they used cryo'd tubes from various manufacturers.

A quick Google search found mention of Phillips USA and Russian 6922's (both of which used to be plentiful/inexpensive).

If you can post close up pics that would help.

Otherwise look for the Tubemonger tube library website as he has excellent pics of various tubes, including 6922's.

DeKay

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