Voltage-regulator tube high-frequency signal generator

Published:2011/4/25 4:33:00 Author:Ecco | Keyword: Voltage-regulator tube , high-frequency , signal generator | From:SeekIC

Using the breakdown characteristics of zener regulator can get the high frequency signal which can be up to several hundred MHz, the circuit is shown as the chart. The signal removing from the output end V01 is a single frequency signal, which can be used to fine-tune the resonant frequency of tuned circuit. The signal removing from the output end V02 is the broad spectrum of high-frequency signal, which can enter the tune the system between the input resonant circuit and the oscillator tuning circuit in superheterodyne radio circuit. Generator frequency range is l00kHz ~ 27MHz, which is divided into five bands of 100kHz ~ 300kHz ~ l MHz ~ 3MHz ~ 9MHz ~ 27MHz. Signal generator's output voltage is 9mV. Ll ~ L5 coil is rounded with skeleton, with fine-tuning core. Ll ~ L3 are enameled with Φ0.1mm wires, L4, L5 are enameled with Φ0.2mm wires. The number of turns of Ll ~ L5 is 270 +270, 260, 80, 30 and 10. After assembly, it needs to be corrected by the standard calibration signal generator, and mark the frequency scale on the knob of the variable capacitor C3. Adjusting Potentiometer make the output frequency signal be strongest. Regulator used in the circuit is without special requirements, but the value of the supply voltage should be higher than the regulator to ensure the regulator operating in the inflection point on the curve.



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