LDR transistor gain

[Kipper4]

Cheers man.

[Kipper4]

[Kipper4]

I'm wondering if the first compressor/expander was born out of the thought, "Well, we've tried controlling everything else with an envelope follower, so why not an envelope-controlled envelope?" 

http://www.michaelsharris.com/electronics/images/transisitorswitchingLED.gif

[PRR]

> I'm wondering if the first compressor/expander was born out of the thought.....

We actually know this bit of history.

Talking-movie sound, also AM broadcast, is sensitive to over-modulation. Radio less so since it was all live. A movie transient that CLANGED the light-valve would CLANG on hundreds of showings. So peak limiters start in movie technology, spread into radio.

The "envelope follower" concept was well known from AM demodulation, which is an envelope follower tuned for <5Kcps variations: the audio envelope of a modulated carrier. Make the cap bigger, you have <20cps envelope shape.

[Kipper4]

I'm not sure whats going on with the pot would someone care to explain please.

Wat'satdo?

Thanks In advance
Rich

[Kipper4]

https://youtu.be/ReuIg7IW66k

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