Buffered Crystal VXO

Posted on Jan 21, 2013

The circuit is an VXO with buffered output. It operates on 20-meter amateur radio band with the output voltage about 0.2 Vp-p. The crystal frequency is pulled by tuning the variable capacitor CV1 about 36Khz with only one crystal (Y1), and 250Khz by using two crystals Y1 and Y2. The first configuration stability is much better than using two crystals. However, if you need more frequency variation, use two crystals and you have to pay the cost by getting less stability.

Buffered Crystal VXO
Click here to download the full size of the above Circuit.

By the way, the value of the inductor L1 is critical to achieve the most frequency variation. You can use it in transmitters, receivers and transceivers with good results.

Leave Comment

characters left:

New Circuits



Popular Circuits

12V stroboscope
Fuzz box 3
Simple Electronic Combination Lock circuit diagram
Simple High Quality Preamp For Hi-Fi
Understand the 74HC595
decibel meter circuit
Tone Controls
Long wave radio and medium wave radio receiver using TBA120
Ultrasonic Radar AlarmCircuit Project
Cat and Dog Repeller
Atari Joystick Wired Remote Control for Robots
Medical ultrasonic atomizer 1
OPA606 capacitive load isolation buffer
Blinker circuit one b