1965 GRUNDIG TK23L de Luxe Reel-to-reel

My new (and finally working) reel-to-reel tape recorder, a 1965-66 Grundig TK23L. DOA, it had completely funtional transport mechanics, but there was no sound and it would not record at all. after replacing variors caps, it works, mostly. It uses five vacuum tubes (or valves, depending on where you are).