Georgehifi,
So let me get this right. You design with Cadmium Photocells but you don’t know they are ACTIVE semiconductor devices? That’s right, active semiconductor devices. Period. End of story. Not debatable even.
My gosh. You don’t even know how a CdS photocell works. It does not change its chemical properties when exposed to light. It is a doped semiconductor. Exposing it to light increases the availability of free electrons for conduction.
Teletronix limiting amplifiers, first released in late 1950’s, early 1960’s used CDS Photocells to control audio level. That was later built into other equipment. YOU absolutely did not introduce photocells to audio for level control.
So let me get this right. You design with Cadmium Photocells but you don’t know they are ACTIVE semiconductor devices? That’s right, active semiconductor devices. Period. End of story. Not debatable even.
My gosh. You don’t even know how a CdS photocell works. It does not change its chemical properties when exposed to light. It is a doped semiconductor. Exposing it to light increases the availability of free electrons for conduction.
Teletronix limiting amplifiers, first released in late 1950’s, early 1960’s used CDS Photocells to control audio level. That was later built into other equipment. YOU absolutely did not introduce photocells to audio for level control.