/diy/ - Do It Yourself

>>1538471
>Why does the filtering make it easier to utilize as power source?
Why does filtering stepped-down AC line voltage make it easier to utilize as a power source?

I get now the (strange, but comprehensible) idea you're talking about, now.

What you're describing, theoretically, is 'harvesting power' from a strong local AM signal.
The filter in this case is just there to accumulate charge, which (theoretically) could be used to power an RF amplifier for another AM signal you're tuned to.
The amount of power available would be very small though. At best I'd think you could use it to power a single FET used as an RF amplifier in front of the diode detector.

I'd also think that the best way to implement a scheme like this would be to *not* tune a single AM signal to rectify and use as a power source, but to use *all available* AM signals. You might even use a separate antenna to 'harvest' all the available AM carriers for this purpose.

However this sounds like a more complicated idea than it has to be, if all you're trying to do is receive a relatively weak AM radio station. A better, simpler idea is to simply use a longer longwire antenna, placed as high up as you possibly can. Also be sure to use a good solid earth ground.