I have put RAM super low noise tubes in every component I have had that used 6922 tubes. They are absolutly dead quiet.
Here is the address:
http://search.store.yahoo.com/cgi-bin/nsearch?catalog=tubeaudiostore&query=6922&.autodone=http%3A%2F%2Fwww.tubeaudiostore.com%2Fnsearch.html
Here is the address:
http://search.store.yahoo.com/cgi-bin/nsearch?catalog=tubeaudiostore&query=6922&.autodone=http%3A%2F%2Fwww.tubeaudiostore.com%2Fnsearch.html