FM Transmitter aka Spy Bug

Look here. Typically they transmit (illegally perhaps) to normal broadcast band radios.

 

smaller inductor and/or capacitor in the tuned circuit(s)

 

retune the oscillator to a higher frequency


You still dont seem to understand that radio receivers DONT stop at 108MHz.
There are all sorts of receivers that cover huge ranges of frequencies.... as one of the other guys mentioned scanners

My scanner goes continuous coverage from 100kHz to 2400MHz. it will pick up your signal regardless of the freq you used in that range ( if I lived in your region)


Dave

 

Decrease the number of turns (you're probably looking at very few turns anyway, so reducing it by 1 turn may be plenty. Alternatively you may be able to just stretch it out a bit.

 

there's no such thing as a "special receiver"

you just need a receiver that covers the frequency of your transmitter

Dave

 

Get a receiver and transmitter that work together then make similar modifications to both.

And call him Sir.

If you're using a standard FM radio, you *may* be able to "tune" it (de-tune actually) to cover a slightly different range of frequencies.

Perhaps more reliably, you just go out and buy a receiver that covers the band you're interested in.