MHDT Orchid TUBE ROLLING

I have some Russian 6922 equivalent tubes leftover from a tube output CD player I had years ago. I'll need to try to identify them before I try any, but I seem to remember them being 6N1P or 6H30. Anyone try one of those? I think think they are only loosely compatible (heater current?) and I'd rather not let the magic smoke out of any components.

Orchid ordered. Going to try the stock tube first (weird, right?) Probably get the 6922 adapter if I can positively identify the tubes I have floating around. Are there any 5670 or 6922 new production tubes worth a look? I have notoriously bad luck with NOS tubes.

Thank You for the Link.
This will be a good upcoming experience to be undertaken.

I have both adapters and prefer the 6sn7 gray glass RCA vt-231, nice bass and natural airy detail. The clear glass and black glass are nice but always go back to gray glass. I thought I would like the ken rad vt-231 with big bass but didn’t work for me. I did like the 6922 bugle boy the most out of all the amprex tubes SQ,PQ and others. But always go back to gray glass rca.

Update.  The military jw2c51 arrived and it is identical to my civilian version in every way.  Both military and civilian versions say jw2c51 at the top of the tube.  Only the civilian version says we396a at the bottom.  Same ink, style and logo.  Same black plate, “D” getter and construction.

with 6dj8 and 6sn7 adapters for the mhdt units, one has a very very broad range of tube choices to roll, and both tube types have long illustrious histories and were made in various parts of the world to boot

you will get somewhat lower gain from some variants(esp. older 6sn7s), but since the tube is used as an output buffer only, that will not impact the dac's output voltage too much

for all tube rollers of orchids, stockholms, istanbuls and the like, just be careful -- be very gentle and use a steady and firm hand when removing the tube from the adapter, find the right orientation where gentle rocking pressure will loosen and release the tube pins, and especially when releasing the adapter from the socket on the dac's pcb board... the board is somewhat flexy and there are examples of folks breaking connections between the tube socket and the board below - jian at mhdt has been cool about sending replacement boards in the past, but one cannot count on his goodwill being extended indefinitely