Lrl from Italy

[liudengyuand]

In this circuit, if the crystal frequency uses 100MHz, which requires changes, because the 100MHz frequency is very high, I think we should pay attention to the filtering of the capacitor

[mc_307]

hello guys, i have a problem. led1 is not working at all. led2 and led3 are working, buzzer is working. I replaced lm358 and led, but still not working..

[FrancoItaly]

hello guys, i have a problem. led1 is not working at all. led2 and led3 are working, buzzer is working. I replaced lm358 and led, but still not working..

If the buzzer works, the led that is connected to the same point must also work, check the value of R9, perhaps it is wrong.

[mc_307]

If the buzzer works, the led that is connected to the same point must also work, check the value of R9, perhaps it is wrong.

I connected 22k resistors in series to p1, but I don't have 560k and 56k resistors. 220k and 150k connected. Could the problem be caused by this? also led1 connected to ic2b r7. When p1 and p2 are fully open, all the leds are on and the buzzer beeps. I made the single coil crystal one. I guess I need to find 560k and 56k resistors. Are these values so important? Are there close values?

[Sally]

Hi Franco, I'm a newbie here. I will try to build your 8mhz crystal detector and thank you for sharing your design here in this forum. I do not know if it works here in my country somewhere in South East Asia. Hopefully it will and serve the purpose. Will update you soon. Thank you.

[liudengyuand]

Should be joined .Acc circuit

[liudengyuand]

AGC

[kaveh]

Hello to all friends , I want to use the mpsa18 transistor in this circuit. Is there no problem? Thank you

[FrancoItaly]

Hello to all friends , I want to use the mpsa18 transistor in this circuit. Is there no problem? Thank you

I think if you use it with a gain greater than 500 it is fine.

[liudengyuand]

I think we should change the power supply, using a single lithium battery voltage, 3V to supply the whole system without the need for too much bulky battery

[ERDOGAN37]

LRL

https://www.youtube.com/watch?v=C1LQ1oayuzwl

[humhum]

https://www.youtube.com/watch?v=C1LQ1oayuzwl

Coungratulation Friend .

[ERDOGAN37]

Teşekk?rler

[FrancoItaly]

I placed again a 20Mhz version which proved unstable, but simply by changing the quartz from 20Mhz to 14Mhz it became stable, I have verified this with two lrls. This is basically the original 8Mhz version in which I changed the value of the quartz and added several trimmers to facilitate the tuning. By adjusting C10 it is possible to find a point where the signal increases considerably, a sign that it is tuned on a harmonic and this increases the sensitivity of the lrl. You can also try other frequencies, for example 15 Mhz, 16 Mhz, 17Mhz or others. I haven't been able to test on the field yet.

[brain]

As soon as the phenomenon catches the sinus amplitude value, there is growth. I saw this in the trials at 110 mhz. I will send you by franco size at 110 mhz. I used your circuit.