Steve, AKA Flickr user 3dking, built this mint-tin, PCB-less(!) SDR upverter, which switches your software-controlled Ham radio from VHF to HF.

I built another up-converter, this time in to an Altoids tin and stuck a low quality label on the tin lid. This version includes the switching relay to connect the HF antenna when power is applied and the VHF/UHF antenna when power to the converter is removed.