Jacob Hamel was the director of the choral group De Joodse Stem and the Jacob Hamel's children choir.
M.H. Gans, Memorboek. Platenatlas van het leven der joden in Nederland van de middeleeuwen tot 1940 (6e bijgewerkte druk; Baarn 1988) 634-635
The children choir was broadcasted on the radio on the tuesday afternoon at 17:00 by the AVRO.
Addition of a visitor of the website
People who as children were neighbours of Jacob Hamel recall that he always sat by his open window when the weather was fine. They would go sit on his windowsill and talk about all sorts of things. Before they went home, they would sing a song together. Jacob often sat there in his dressing gown. He rarely went outside. Once, the children were allowed to come in, because Jacob wanted to show them a player piano. The children were impressed, because they had never seen anything like it before.
Addition of a visitor of the website