@▷ FETs based Micro-Spy | Diagram for Schematic

FETs based Micro-Spy

Micro-Spy circuit which designed using FET components.
FETs based Micro Spy circuit
Notes:

  • The FETs, T1 and T2, are BF245 N-channel FET’s model. It can be replaced with a NTE133 or ECG312. The BA121 varactor diode can be replaced with a ECG/NTE611. USW stands for ‘Ultra-Short-Wave’.
  • The oscillator has a frequency of approximately 100MHz.
  • L1 = 7 turns of 0.8mm Silverwire on a 5mm round Ferrit-core (adjustable).
  • Feedback via 16pF capacitor. No interference from antenna on resonance-loop.
  • Distance is at *least* 300 meters!

Circuit diagram by Tony Van Roon

"FETs based Micro-Spy Search Tags"
Micro-Spy circuit,Micro-Spy diagram,Micro-Spy schematic,Micro-Spy with fets,simple Micro-Spy
Advertiser