pepewaw
Newbie level 6
I'm trying to understand a fm transmitter (attached as an image), which I built and works fine. However, there are a couple of issues I'm trying to figure out (all of them regarding the 2nd part, the first part I figured it's a preenfasis filter):
1. I'm assuming it's a Colpitts oscillator, where DV1 acts as a variable capacitor (you cant see on the schematic, but it's actually a varicap) dependant on the signal inputed through R6. Is this assumption correct? (or is it some other kind of oscillator? maybe a Hartley?)
2. What's the use of R6? (82K) Why cant I just connect it directly to the varicap?
3. Which is the correct output of the antenna, A or B? and what's the use of the other output?
1. I'm assuming it's a Colpitts oscillator, where DV1 acts as a variable capacitor (you cant see on the schematic, but it's actually a varicap) dependant on the signal inputed through R6. Is this assumption correct? (or is it some other kind of oscillator? maybe a Hartley?)
2. What's the use of R6? (82K) Why cant I just connect it directly to the varicap?
3. Which is the correct output of the antenna, A or B? and what's the use of the other output?