Quote:
Originally Posted by taher5739
Thank you so much Mr. Franco
But I think you did not understand me
I built two type of your circuit.
The quartz circuit works well But the non-quartz circuit (your first circuit, which 6 bars) does not output.
Transistors 1, 2 and 3 have voltages, but transistor 4 does not have voltage.
for oscillation( parasitic coupling) Do i connect bottom strips to ground ?
Thanks for your reply  |
In my first lrl (self oscillating) the lower strips are not needed, in fact the lower screen is used to prevent self-oscillations. I advise against using this version, I made the version with oscillator just to make the lrl less critical to build. One way to trigger the self oscillation is to use a lower strip to connect the collector of TR2 with the base of TR1 or between the collector of TR3 with the base of TR2 via an appropriate (small value) capacitor. In this way two points out of phase of 360 degrees are connected. The only possible advantage of this version is that with it you are sure to have obtained the maximum amplification. As I said in the past this lrl derives from a bug detector that auto oscillated providing a stable signal capable of revealing the "phenomenon".