This is from an Elenco AM/FM superheterodyne radio receiver kit.
The shown area is the AM antenna and mixer stage. The wire leading from the top right corner is Vcc.
Q7 simultaneously oscillates at the IF and mixes this with the received signal.
It appears that the right side of L4 is for the IF oscillator tuning and the left side picks up the signal from the air.
I do not understand what capacitors C28 and C30 are for. The instructions are slightly vague at this point.
Could someone please explain what they may be for?
Why is Vcc leading into the RF tank circuit?