There are many ways to build a radio receiver, but most have a few ... job and leaves you with something like this homebrew all-band receiver. Granted, dispensing with everything but a detector ...
Making A Transistor Radio, 2nd edition cover ... simple designs for a range of transceivers for the VHF bands with regenerative receivers, including the rather minimalist 2 metre (144MHz ...
The Digital Radio Mondiale Consortium has released its DRM Consumer Radio Receiver Functionality Recommendation.