Hi, I’m a beginner, and I would like to know if anyone could please explain to me how to make this ferrite core coil:
www.scitoyscatalog.com/product/FERRITECOIL.html
The core can move independently inside the windings, and there are two windings (4 leads). I think the independent movement of the core is achieved by doing the main winding on paper wound around the core. However the second winding stumps me. Does it have something to do with the ridge that can be seen along the top of the main winding? How long is it? Is it separate from the main winding?
Any assistance and suggestions would be much appreciated.
I need the ferrite core for this little crystal set which I’m planning to build:
http://sci-toys.com/scitoys/scitoys/radio/closeup_two_coil_loop_crystal_radio.jpg
Thank you,
Errol
www.scitoyscatalog.com/product/FERRITECOIL.html
The core can move independently inside the windings, and there are two windings (4 leads). I think the independent movement of the core is achieved by doing the main winding on paper wound around the core. However the second winding stumps me. Does it have something to do with the ridge that can be seen along the top of the main winding? How long is it? Is it separate from the main winding?
Any assistance and suggestions would be much appreciated.
I need the ferrite core for this little crystal set which I’m planning to build:
http://sci-toys.com/scitoys/scitoys/radio/closeup_two_coil_loop_crystal_radio.jpg
Thank you,
Errol