The Ondium Péchadre was developed in France by Henri Camille Robert Péchadre in 1929. The instrument was a monophonic heterodyning vacuum tube oscillator based instrument built into a light and portable heart shaped box, in performance the base of the instrument rested on the players knees and the instrument was supported against a table. The six octave range of the instrument was controlled by moving a pointer around a circular calibrated dial while the left hand controlled the volume of the sound with a velocity sensitive push button device. The attack and timbre of the sound wave could be altered to give a more staccato effect or softened to give a more string like sound.
‘Le Ménestrel’ Paris 1933.
‘L’Ouest Eclair’ Rennes. 29/10/1931 number 12775.
‘Un appareil de musique radioélectrique; l’ondium Péchadre’ by E. WEISS. La Nature N° 2837 – 15 juillet 1930 Pages 64-65