Quite a video about crystal radios. It actually taught me the most useful information with your instruments of choice. Great way of explaining radio waves.
There are a lot of variables. But the most common things to consider are ferrite does not work well at high frequencies, but it is good at concentrating the EM field (smaller coils).
I have not tried that, but in theory the inner ball would act more like a solid piece of copper. It should increase inductance (and rob power via eddy currents).
Your coil experiments are helping me to understand better.
It gives me a chance to test myself on what I think I know. I don't show the failures. ;)
Quite a video about crystal radios. It actually taught me the most useful information with your instruments of choice. Great way of explaining radio waves.
Thanks. Glad it was useful.
Your conclusions are very interesting. It turns out that not everything is obvious
Is there a downside to using the ferrite plug?
There are a lot of variables. But the most common things to consider are ferrite does not work well at high frequencies, but it is good at concentrating the EM field (smaller coils).
you're using an LED as a RF detector? what type?
Just one out of my parts box. Nothing special.
What about the diameter of the coil does this affect it
Yes. This video goes over that. th-cam.com/video/ejHk5tFeKHk/w-d-xo.html
What happenes if you short the inner windig of the coupler and use the outer wind as inductor tor it
I have not tried that, but in theory the inner ball would act more like a solid piece of copper. It should increase inductance (and rob power via eddy currents).