What type of oscillator!?

[aj_silverthunder]

here is a image of a oscillator! " https://www.flickr.com/photos/aj_silverthunder/4157840441/ ".
my doubt is which type of oscillator is this.
what is the frequency of the oscillator!
is the frequency of the oscillator is stable!
does it have frequency drift!
should i add all the values of the capacitors(BB139,15pF,33pF,22pF) and the value of the L1 is 100nH then what could be the frequency of the oscillator!

 

[mohammadpiano]

hi my friend
plz attach ur pic to this page

 

[aj_silverthunder]

here is the oscillator

 

[trayant]

BB139 is the verator. so, this is a resonator type of oscillator. the BJT is act as the gain stage for the oscillator.

most of the oscillator will face the frequency drift problem which is known as phase noise.

 

[aj_silverthunder]

BB139 is the verator. so, this is a resonator type of oscillator. the BJT is act as the gain stage for the oscillator.

most of the oscillator will face the frequency drift problem which is known as phase noise.

i think BB139 is a varactor!

check out this oscillator!
what do u feel about it!

 

[Audioguru]

The first circuit has only one voltage regulator. Why does the second circuit have a second voltage regulator?

 

[aj_silverthunder]

its is for the stability and MV2109 will be @ 30pF when 5 volts is applied...
and with the help of the pot i can change the voltage a little bit!and 7805 will regulate the 9V to 5 V

Added after 15 seconds:

am i right guys!

 

[Audioguru]

You don't need the 5V regulator. The pot can adjust the voltage from the 9V regulator.

 

[trayant]

BB139 is the verator. so, this is a resonator type of oscillator. the BJT is act as the gain stage for the oscillator.

most of the oscillator will face the frequency drift problem which is known as phase noise.

i think BB139 is a varactor!

check out this oscillator!
what do u feel about it!

hi silverthunder,

i think we are right. BB139 is varator. anything wrong about this? why you expression sound so harsh? all sentence end with exclamation mark?

 

[aj_silverthunder]

sorry dude i am not harsh!
i promise u that i didnt use that exclamation mark to hurt u trayant!
but some people in the forum tell me to get out from here,isnt it harsh and rude trayant!

Added after 36 seconds:

trayant please dont feel bad! lets be friends!

 

[Audioguru]

I think that 104 posts and six threads about this simple circuit is harsh and rude.

 

[aj_silverthunder]

dude i lot many by that 104 posts! didnt I!
i think this forum is to help people in electronics.
but i also did some wrong by starting many threads,from now on i will not!

 

[Audioguru]

We are not here to teach the very basics to people who know nothing about electronics.

I think these same 104 questions are also on the other website.

Are these same questions also on two websites in your country?

 

[aj_silverthunder]

can u name them!

 

[trayant]

haha, dont worry. i am fine. i just curious then voice out my opinion only.

 

[aj_silverthunder]

guys here is a band pass filter " https://en.wikipedia.org/wiki/File:Bandpass_Filter.svg "
i want to filter 95Mhz from a oscillator! so should be the resonance of tank circuit of the filter should
be 95Mhz in order to pass only 95MHz...
for example 180nH and 15pF makes 95Mhz...so the values of the three inductors should be 180nH and the all three capacitors be 15pF...am i right.please help me!

 

[Audioguru]

Please don't post the same question in two threads.
I answered the other thread less than 1 minute ago.

 

[aj_silverthunder]

sorry,i thought u wont help me!so i posted two times!sorry!