There isn't any, you can copy specs and explanation from Wieslaw's H7M ebay ad. Tube-biasing is automatic, so you can swap tubes easily. There is a switch-on delay protection, so it should be safe to switch on the amp both with and without headphones attached.Have any of you guys got a copy of the H7M manual you could email me?
Or is the manual pretty much generic across the Eufonika range? If so, could someone email a copy of their manual please?
I've been in touch with Eufonika and not had a reply so far.
Tube compatibility:
6N13S - 6N5S, 6AS7, 6080, ECC230 (as per H5 and H6M ebay ads)
6N1P - E88CC, 6922 (as per lawrence's post above)
I would check with Wieslaw, if this goes for all H7/H7M. The model might have undergone revisions, and yours might be an early version, so best to double-check.