Sunday, February 28, 2021
This basic circuit would be good for a high Z headphone amp.
I reloaded the LTSpice iv simulator with no additional lib.
If you load spice iv you can follow the sims.
This one does not look bad BUT we will look closer latter.
Wednesday, February 24, 2021
The brave at heart could do it like this 2 and 3 makes a coil former that can be 'jumble' wound. For a one off production this will work but the jumble wind is not reproducible. (It will need adjustment.)
You can design a single layer coil using this nemograph and a good wire chart.
such as this one.
One more found on the web put in a can and ready to use.