Posted on Sep 22, 2012

A Hartley oscillator is shown at the right. It uses most of the same components as the Clapp oscillator. A capacitor is necessary to block the gate bias voltage from the tuned circuit. The tuning capacitor is a 100 pF poly capacitor. L1 is a coil wound with #30 wire on a 1/2` form--I used a lucite tube. It has 210 turns, tapped at the 45th turn, and is about 3` long. The tube makes a nice handle while winding the coil, and is cut off when the winding is finished.

Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Motor Speed Controller
ON/OFF button using Microcontrollers
24 LED SpotlightCircuit
surround sound processor circuit
1w led driver
Three phase auto changer circuit
AC Locomotive Auxiliary Equipment
Dual 25W stereo audio power amplifier circuit