Since I installed a 6922 adapter (from Garage 1217), I tried various flavors of the 6dj8/6922/7308 family. Hence, I'm selling my NOS 396a tubes, including WE JW396a, Tung Sol, GE and the rare 1970 Tesla Military pinched-waist flavors.
gelle... Siemens made valves are from German and the European 6922 (American designation) equivalent is the e88cc. Many tube dealers, such as Brent Jessee, carry them. Top of the Siemens line is the CCa, followed by the e188cc (American 7308), the e88cc and the ecc88. Does that answer your question?
The Orchid takes 5670 tubes. The adapter needs to convert 5670 pin configuration to 6922 pin configuration. What I am looking for a HIGH QUALITY pin adapter, not just any old adapter, that is, one with quality components and construction. I am aware of the adapters cited. In other words, what I am hoping for is feedback on adapter quality. Perhaps the ones cited fit the bill, I just don't know. In general, there is a lot of junk out there.