i am looking for oscillator by using transistor to generate 2.5 mhz sine wave

 

Hello,

What do you mean?
2.5 mili Hertz or 2.5 Mega Hertz?

You could look at some collpits or hartley oscillator, if it is for 2.5 MHz.

Bertus

 

Hello,

What do you mean?
2.5 mili Hertz or 2.5 Mega Hertz?

You could look at some collpits or hartley oscillator, if it is for 2.5 MHz.

Bertus

i mean 2.5 mega hertz
thanks very much

 

Hello,

The following PDF has a 10.7 Mhz oscillator inside:
10.7MHz Signal Generator.pdf

You can adapt the LC circuit to match the 2.5 Mhz.

Bertus

 

how collpit oscillator work

 

Hello,

Take a look at this page for more info on the colpitts oscillator:
http://www.electronics-tutorials.ws/oscillator/colpitts.html

Bertus