Japanese Neofight Receiver Single IC, 40m direct conversion reciver. Extreemly simple, VFO, Balance modulator, AF amplifier all in one single 9 pin chip!
VHF Regen Receiver Single FET tunable super-regenerative front end to be used with a sutable amplifier. Although it looks very simple, it is not good for an absolute beginners.
Two types of 2 transistor 7MHz radiosHow to make simple rcvers for 40m band 1 using FET and onther one using Bipolar Transistors.