hello, i would like to know something for this circuit i am wondering how can i calculate the resonant frequency for this circuit. as i know, i can calculate the resonant frequency using the following equation: my problem is if the coil = 2 microhenry for the sending circuit and the variable capacitor is set to 1 nanofarad for the sending circuit and receiving circuit. how would the transformer for the antenna effect my calculations? will it change the resonant frequency? i am looking forward to knowing how can i calculate the frequency for this circuit if the "coil" is 2 microhenry and the primary + the secondary is 1 microhenry for the transformer in the transmitter and receiver circuit (the capacitor is 1 nanofarad for transmitter and receiver circuit) With my best regards.