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Re: Would someone mind explaining to me how the BFO frequency circuit works?

 

Q10 is the xtal oscillator with L & C in series, to pull the xtal down a bit to suit LSB.

If you can generate a second frequency from the Si then you can remove Q10 and use Q11 to buffer it to the mixer.

In the meanwhile I'll stick to my analog VFO!

73
Raj

At 23/02/2017, you wrote:

I was wondering more about what the purpose of Q10 and Q11 serve.


What I'm trying to do is take an output from SI5351 and replace the entire BFO circuit so I can easily switch between LSB and USB via software.
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