Hi Tim - I notice you're not getting much input about your tube questions. I wonder if you heard anything directly from the company. I have an Amber as well and have tried to get some input on valves, even emailed LamizatOrNA a couple of times but got no answers. They seem to respond to all other types of questions such as DAC upgrade options, etc., but no response when to comes to valves or anything internal to the DAC. I suppose they expect owners ship their (old) DACs to Poland for valve replacement and I find that unacceptable. Mine is about 5.5 years old and the tubes are possibly tired.
Anyway rant aside, can you please tell me which valves are in which locations, e.g., Ecc81 in V1 and Ecc82 in V2 or its the other way around? I bought mine used and the tubes in mine are NOS Brimar, possibly OEM, with no visible markings indicating the numbers. Also, as far as I know, Ecc81/Ecc82 should be direct replacements for 12AT7/12AU7 tubes, respectively.
Appreciate your input. Thanks in advance.
P.S. Tried to send you a private message with no luck.