Electro-Harmonix Rhythm 12

The EH Rhythm 12 is ElectroHarmonix' very first drum machine.It came out in 1976.

It's pretty unusual isn't it. Nothing like their later pedals & effects.
It is actually made in the UK by a company called SoundTech.
This example must be a late model as the first examples had a EH sticker over the Soundtech logo.

The TOUCH plate is really cool. Its a touch sensitive on/off switch. This reminds me of a similar switch found on the old Roland 77 drum machine.

The sounds are of course all analog. There are 4 voices. They aren't realistic but put through some effects pedals they can sound quite narly which I like.

The dimensions are: 4" x 6" x 7/8".
There are 3 controls : Volume, Tempo and a preset selector.
There are 12 presets but sadly these can't be combined with one another like on similar drum machines from the period.

 The unit is powered by a DC 18V psu.

On the left end of the unit are jacks for the audio OUTPUT, F/S footswitch) , and 18V (the PSU).