thank you Mr.colin! lucky to have you here. but, i want to use it as a bug. but,for 6v i have to use 4 AAA and a battery holder.kind of bulky.isn't it?if i use 9v battery will there be any problem except for the power wastage? what will be RF output in mW,if i use a 9v battery. or please tell me what will be the signal strength(roughly) in µv measured at 3meters.
i want to make the circuit using surface mount components and place it on top of a 9v battery. like voyager. the oscillator circuit and audio stage of the above circuit is identical to voyager. except for the microphone gain resistor and buffer stage.isn't it? and you used 9v there.could you explain on this?
thank you once again.