The central operating range of this small short-wave transmitter is around 27 MHz, but the coil can be changed to operate between 7 and 30 MHz. For the 7 MHz range the coil consists of 20 + 20 turns of wire 28 num ferrite rod. The antenna can be telescopic from 1 to 2 meters and the range depends on the sensitivity of the receiver and can reach a few tens of meters. The power supply can be made with voltages up to 9 V.
| Clique na imagem para ampliar |
