Aug 12, 2019 #1 P promach Advanced Member level 4 Joined Feb 22, 2016 Messages 1,199 Helped 2 Reputation 4 Reaction score 5 Trophy points 1,318 Activity points 11,636 What are the purposes of {L5, R5} , {C10, C11} , {R2, R4} in this HF upconverter circuit ?