My TDK Cassettes Collection

Here the last tapes, i`ve got

that are used ones, because there are no sealed to find. Here you also can see the "stars", they also mark the quality of the tape - more stars, higher quality.

These are tapes, where you was able to record news or other information and send with mail - on the back you can write the adress .

And here`s an important one for collection - the first generation of SA / Japan from 1974 in very good condition.

I still have one with a damaged seal, but new - if somebody is interested in - please pn.

 

Meanwhile i`ve got some of used TDK Metal Tapes, to get a closer look to mechanism and case, especially the frame and their differences.

I wanted to make some records - but there`s a big problem - the MA-R from 1979 and 1982 have no Tape Type Identifier Apertures :

My deck has an automatic Tape Recognition, and the Calibration is connected to the Tape type. These tapes are recognized as "Normal" / Type I - so the calibration doesn`t work.
The only thing i can do is to change the frame from the 1984 model to the older ones, it`s too fiddly to make self-made holes in the frame ( you need four... ) ;-)
Does anybody have experiences with the calibration of these tapes without the ID apertures . Does Auto Calibration in the corresponding decks work exactly ?