neazoi
Advanced Member level 6
The purpose of the Q1 stage is to present a constant impedance at the summing point (base of Q3) but depending on what you feed it from, you may be able to leave that out too.
Brian.
Do you think I could leave Q1 out, if I connect it after the 10k resistor in the output of the regen detector (through a 100nF DC blocking capacitor) in my receiver circuit?
**broken link removed**
I consider the constant impedance thing you mentioned.
Would you also leave the input signal attenuator near Q1, to adjust the input signal level to Q3 for correct cancellation. Or it is not needed, because of the R4?