Re: What is this machine, and does the reproducer look right
Posted: Thu Apr 11, 2019 5:23 pm
Well, that would explain why it's so heavy!
There is always something to learn on this board. For fifty years or more I have believed that neither copper nor aluminium diaphragms were ever used commercially on the sound-boxes of disc machines (other than those of Edison) until the Victor/H.M.V. No. 5 series appeared in the late 1920s; and yet here, if I have understood rightly, we are discussing a Columbia machine of about 1915 which was fitted with such a diaphragm from new. Is this correct? Is it common to find metal diaphragms as original equipment on pre-1929 boxes?
Oliver Mundy.