This crystal-controlled oscillator can generate signals as high as 200 MHz. The L1 coil is made up of a 1.5 cm diameter 2.0 cm long U-wire, 20 to 26 AWG wires. can be used. The 1 pF (ceramic) output capacitor is connected 0.5 cm from the coil connection point to the XRF. The crystal oscillates in the seventh harmonic in this application, a value that should be taken into account when choosing. The capacitors must all be ceramic.
