Lrl from Italy

[Pahom]

Originally Posted by FrancoItaly

I would like to warn those who intend to make the 20Mhz version of my lrl to wait because, while the first one works perfectly, the other two, which I did later, have problems with signal instability. I am making substantial changes and think I have solved the problem. I will post the changes as soon as possible.

Good evening Franco! Did you solve the problem with signal instability?

[FrancoItaly]

Originally Posted by Pahom

Good evening Franco! Did you solve the problem with signal instability?

Not yet, but I understand that part of the problem is that on + 12V there is a very large signal at 20Mhz. With the 8Mhz lrl there were not all these problems.

[liudengyuand]

Is it really useful？

[FrancoItaly]

Originally Posted by liudengyuand

Is it really useful？

could be.

[liudengyuand]

Who knows in what range the inductance of 3 turns is?

[FrancoItaly]

Originally Posted by liudengyuand

Who knows in what range the inductance of 3 turns is?

I think less than 1 micro Henry.

[liudengyuand]

Your document mentions that the tr5 emitter output should reach 5v, but the use of double-sided large-area copper-clad PCBs cannot reach 5v, only about 2v, but it does not affect the sensitivity of electromagnetic field reception. So I think that the output voltage of tr5 has nothing to do with it.