Have by now started to play old tapes and found that the older the better. The tapes form the 60's & 70's of Agfa, Basf, Scotch etc plays just very fine.
Some tapes from the 80's & 90's are however very troublesome, or just impossible to play. Among them are Ampex and Agfa. The tape itself acts like a "glue" and makes the whole tapemachine stop.
Are there any list of such trouble tapes, so I can avoid those brands and types when purchasing tapes second hand?
All the best