Description Circuit showing a mobile phone jammer.Here i have used a fm transistor for making this circuit.Mobile phones are working in 450 MHz frequency .Here the transmitter generate almost equal to 450 MHz frequency there for the mobile phone does not identify the original signal but the signal range is very week so this circuit working in only 100 m range .This circuit working in only 450 Mhz .Do not give more than 3 V

Part List Component No: Value Usage R1 100R Emitter loading R2 39k Base Biasing C1 15 pf Frequency Generating C2 4.7pf Feedback C3 4.7pf Feedback C4 102pf Noise Reduce C5 1MF Coupling C6 2.2pf Coupling C7 103pf Decoupling Q1 BF 494 Amplification L1 22nH Frequency Generating