hifi engine

Grundig TK819 and TK40

Hello reel to reel lovers!

a few days ago i got a Grundig TK819!
it's still stands at a friends home, who has brought it with him on his wayt home.

can any one help me to a users and service manual?
the manuals of the TK820 are welcome to, also the one for the TK40 and TK14