A few days ago I found a box in the warehouse of my friend Carlo, containing some Sinclair items. They had some traces of humidity, fortunately on the outside only. I took them apart, cleaned, tested and then reassembled them, taking a few pictures as usual.
Sinclair ZX Interface 1
The Interface 1 is composed of a single board, here’s the exploded view:
The two sides of the board:
A detail of the connector:
The ports on the back allow you to connect further expansions, create a computer network, and manage serial peripherals; the side connector is used to connect the first Microdrive.
Sinclair ZX Microdrive
Here’s the exploded view of the Microdrive:
This is the interior of the Microdrive shown from the other side, to see the two small boards better:
The microswitch checks if the cartridge is write protected: as for cassette tapes, you can remove a little plastic tab on the side to prevent writing. A detail of the head:
The cartridges are really small, I took a picture with a one pound coin (it seemed more appropriate for an English product :-) to have a dimensional reference.
They are very delicate, and furthermore they weren’t built to last decades; in many of them the sponge material behind the tape just turns into dust, making them unusable.
Together with the Microdrive you got 4 cartridges in a case, instructions, stickers and a notepad.
The plate on the bottom can be unscrewed and repositioned to couple another drive (up to eight).
And now a couple of pictures with the ZX Interface 1 and the ZX Microdrive connected to the ZX Spectrum.