Lucky man!
I suggest that you ask the same question on the "Audio Asylum" discussion
group. Lot's of knowledgable geeks here!

http://www.audioasylum.com/audio/general/bbs.html





"Off Piste" wrote in message
...
I may be posting this to the wrong NG, but there seems to be a lot of
knowledgeable people here, so maybe someone can help me. I have recently
acquired an old Revox B77 tape recorder which I want to experiment with.
Unfortunately, I have no manuals or other information and I can't
determine
if the machine is a MkI or a MkII model. Does anyone know what the
differences are?