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Lindsay's Technical Archive: Armstrong Super Regeneration (1642 words) |
 | The oscillator is tuned in both circuits to a super-audible frequency and to attain this has a 1250 turn duo-lateral coil shunted by a mica condenser of.0025 mfds in its grid circuit, and a DL-1500 in its plate circuit. |
| The amount of energy developed by the oscillator at the variation frequency, however, is sufficient to completely paralyze an audio amplifier if impressed on its grid, and a low-pass filter is necessary between the detector-oscillator and the amplifier to keep out the 12,000-cycle component and yet pass the signal frequency. |
| Armstrong, when "gotten onto," make the operation of a super-regenerative set as easy as the ordinary regenerative circuit with which we are all familiar. |
| www.oscillatorguide.com - Hartley Oscillator (266 words) |
| The Hartley oscillator is an LC electronic oscillator that derives its feedback from a tapped coil in parallel with a capacitor (the tank circuit). |
| The two versions of this oscillator are the series-fed and the shunt-fed. The main difference between the Armstrong and the Hartley oscillators lies in the design of the feedback (tickler) coil. |
| Hartley oscillator are inductively coupled, variable frequency oscillators where the oscillator may be series or shunt fed. Hartley oscillators have the advantage of having one centre tapped inductor and one tuning capacitor. |
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