Wall-mounted loop antenna. To circumvent man-made noise, I frequently use a loop antenna for listening. I

Advantage: no loss of space

Disadvantage: the antenna is not rotatable.

Please note that there is no metal close to the loop antenna.

C min = 30p with 200 pf in parallel 230 pF ==> Resonance frequency = 4.050 KHz

C max = 150p with 200 pf in parallel 350 pF ==> Resonance frequency = 3.336 KHz

Calculated coil value = 6,5 µH