Hello all,

Thank you Guenther for your solution to the AM coil matching.

I also noticed a shifting in the tuning when building this circuit.

By the way, to my surprise, the same circuit build with the NPN transistors performed better ! Something to do with the gain of the first transistor.
As an experiment a few weeks ago, I used a higher gain transistor MPS-A18 and distant stations popped in loud and clear.
I would love to build a transistor block with this high gain transistor.

Just need to order an empty block one of these days.


  • This reply was modified 2 years, 5 months ago by Michael. Reason: Changed font and size styling for easier reading