Building your first radio receiver is a rewarding, educational experience for all those starting to explore electronics. It tunes to the standard medium wave band AM broadcast frequencies (540-1600kHz).
The circuit uses a Tuned Radio Frequency (TRF) front-end and a TA7642 (a modern replacement for the MK484) multi-function AM radio IC that contains RF Amplifier, Active Detection and Automatic Gain Control (AGC) for improved sensitivity. The output of the IC is fed into two stages of audio amplification to drive the speaker supplied. Volume control is also provided for.
All components supplied including a pre-wound coil and ferrite bar antenna, tuning capacitor, TA7642 radio IC, volume control potentiometer with knob, speaker, tuning thumb wheel and high quality printed circuit board.
Excellent project for beginners and schools. Introducessoldering and a good selection of components. Makes a great gift.
Specifications
| Supply | 9Vdc e.g. 9V PP3 battery (Order Code 656.020UK) or Mains adapter (Order Code 661.400UK with connector 777.001UK or 778.106UK is suitable) |
| Board Dimensions | 102 x 33mm |
| Board Connections | Screw terminal blocks (speaker and power) |
| Product Format | SELF-ASSEMBLY Electronic Kit (KT) Product Formats Info |
| Documentation | User Manual TA7642 Datasheet |
