A shunt peaking coil for Q2.
A decoupling capacitor for the effects of R2.
A part of the low-frequency compensation network for Q1.
A series peaking coil for Q1.
A swamping resistor for L2.
L1, L2, and R5.
R9 and C5.
The gain increases.
The gain decreases.
To provide maximum impedance at the desired frequency.
By changing the value.
It uses fewer components than capacitive coupling and can provide an increase in gain.
A step-down transformer.
A too-narrow bandpass.
By using an optimumly-coupled transformer.
Low gain at the center frequency.
A swamping resistor in parallel with the tuned circuit.
RF transformers are used and the transistor is neutralized.
Degenerative or negative.
By neutralization such as the use of a capacitor to provide regenerative (positive) feedback.
C2 and the secondary of T1.
R1 provides the proper bias to the base of Q1 from VBB .
R2 provides the proper bias to the emitter of Q1.
The output would decrease. (C4 decouples R2 preventing degenerative feedback from R2.)
C5 and the primary of T2.