Playing around with the Synket an incredible tube synthesizer made in Italy by Paolo Ketoff in 1964.

video upload by Riccardo Pietroni

See the Synket label for more.

"This is the unit build for Bill Smith by Paolo Ketoff and is completely original.

The Syn-ket comprised of three sound modules or 'sound-combiner' as Ketoff called them – essentially three separate synthesisers built using a mix of solid state and vacuum technology. Each module was independently controllable and interconnectable and mixable into a single output.

Each 'sound-combiner' module consisted of:

1 square wave frequency-controllable oscillator.
A button controlled series of frequency dividers which allowed division of the incoming pitch by factors of 2, 3, 4, 5 and 8 to produce differing harmonics
3 complex filters with a frequency range of 40 Hz – 20 kHz.
1 amplitude control.
3 modulators each controlled by a low frequency oscillator: The first allowed control of the square wave oscillator’s frequency, The second controlled the frequency of the filter and the third controlled audio amplitude.

The Syn–ket was not conceived as a commercial product – Ketoff built only about a dozen variations on the Syn-ket theme between 1963 and 1977 – and notwithstanding it’s innovative and unique features remained a one-off custom made instrument. Despite this, the Syn-ket was widely used by composers other than Eaton and found itself almost ubiquitous on Cinecittà soundtracks for Spaghetti westerns (Ennio Morricone used the Syn-ket on many of his soundtrack scores ), Italian horror and science fiction films."