We found this circuit in an English documentation from 1980. The circuit can be assembled with the BF494 transistor and the rectifier bridge made with common 1N4004 diodes. The coil consists of 4 turns of wire 24 to 28 without a core with a diameter of 1 cm. The circuit works only with analog lines and transmits the signal to an FM receiver.
| Clique na imagem para ampliar |
