friends, how oscillation made by BG4 and around elements?

 

Have a look:
https://en.wikipedia.org/wiki/Blocking_oscillator

 

Have a look:
https://en.wikipedia.org/wiki/Blocking_oscillator

can't go there.

 

Have a look:
https://en.wikipedia.org/wiki/Blocking_oscillator

I don't think it is a blocking oscillator as it has a crystal connected across the coil.

 

can't go there.

You are behind The Great Firewall. It is a shame that they deprive you of so many resources. But on to the issue at hand.

I don't think it is a blocking oscillator as it has a crystal connected across the coil.

You are right. Looking more closely it is a crystal controlled Hartley oscillator.

A little bit is written about the circuit here : https://electricalacademia.com/electronics/oscillator-definition-types-working-circuit/

You might find a description by searching baidu for the Chinese words for crystal controlled Hartley.

 

You are behind The Great Firewall. It is a shame that they deprive you of so many resources. But on to the issue at hand.



You are right. Looking more closely it is a crystal controlled Hartley oscillator.
View attachment 265650
A little bit is written about the circuit here : https://electricalacademia.com/electronics/oscillator-definition-types-working-circuit/

You might find a description by searching baidu for the Chinese words for crystal controlled Hartley.

thx for helping