Another sleeper mic, the Fostex M88 RP (printed) ribbon microphone

http://www.coutant.org/m88rp/index.html


It neither condenser, moving coil or ribbon but it could well be all three.


It has not been tried yet, looks very promising.


If understood well the idea is the following:


An extremely thin circular membrane such as one used in condenser mics is used. On it is printed a thin aluminium spiral ribbon coil.


There is a ring SN magnet above it and a ring SN magnetic below it.


The sound wave passes through each magnetic structure, so figure of eight.


The 2 magnetic structures above and below repel each other so the lines of force end up being perpendicular to the membrane plane. So the magnetic field is at any point on the coil perpendicular to the tangent at that point.


So each electron as membrane vibrates receives a Lorentz force in the direction of the tangent.


Electrons dance to the acoustic music waveform etc.


There is an AES 80s proceedings paper describing operation.


See:
https://www.gearslutz.com/board/so-much-gear-so-little-time/46839-fostex-m22rp-m20rp-printed-ribbon-mics.html


for the proceedings paper information.


And also there is mention at gearslutz of it being used on
Too Late for Goodbyes - Julian Lennon
https://m.youtube.com/watch?v=qVyswhYGrkQ



How would the Fostex M88RP sound connected to the Pleiades V6 electron tube battery powered booster mic amp?