While speaking of cassette tapes :
I have two Philips cassette decks available. The rubber band has
disintegrated. I seem to remember that the ECMA standard was called ECMA 34.
The logic consists of Philips 6 volt TTL. It is a bit vague, but I am quite
sure that the bit rate is about 300 bps. The tapes can contain 250 K on each
side. There is a cut-out in the back of the cassettes, indicating side A or
B
They are available for the mailing cost (from Denmark)
Nico