In the March 2000 QST there was an article on the Tuna Tin QRP transmitter, which I thought I might build:
The text describes Q2 as a C Class amplifier, but I just can't see how that can be true.
"It's ouput (of Q1) tickles the base of Q2 (lightly) with a few mW of drive power, causing Q2 to develop approximately 450 mW of dc input power as it is driven into the Class C mode."
The base biasing on Q2 maintains a quiescent base voltage of 1.4 V, which is plenty to bias Q2 on. I simulated the circuit in LTSpice and then disconnected the oscillator portion and sure enough there was a steady 8.9 mA of collector current. So I conclude that Q2 is in fact in Class A mode.
So, either the article has been wrong for many years (seems unlikely), or there is something here I have misunderstood (more likely :-) ).
So, my question is: Is Q2 operating in Class A or Class C?