how do tuners work !

[jimbo1968]

In the olden days you twiddled a knob and that physically changed the capacitor in a tuned circuit.

What happens when I press a different channel number on my TV tuner remote?

 

[Kabigon]

See this:

http://en.wikipedia.org/wiki/Varicap

 

[jimbo1968]

Thanks.

Clever stuff these semiconductors. I predict they'll catch on.