For the aspiring radio hams is the medium wave band of special interest as referred to in this frequency range, the circuits are still relatively easy and do not show a willful HF behavior.
The number of available stations is quite high, so that can achieve success very quickly.
There are different circuit designs, with both tubes, transistors and integrated circuits / ZN414.
Here is a selection of interesting links to medium wave receiver

Here you will find Schematic Circuit Diagram for DIY and further information on AM receiver (medium)
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Receiver with ZN414	web.telia.com/~u85920178/rx/zn414.htm
Miniature radio medium	www.oselectronics.com/downloads/ZN414Z%20am%20receiver.pdf