Re: Television over a light beam
You did well to get audio out of a sluggish CdS cell like the ORP12. One way to do this was to 'light-bias' it with an external light.
For me, it was the ORP71 photo-transistor. As a teenager, I remember writing in to Practical Wireless asking them if it could handle the audio frequencies needed for mechanical television. When they wrote back, they didn't seem sure but thought it should "handle 15Kc/s quite easily".
Steve
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