Basic booster with capacitive resonance setting as well as controllable signal reinforcement at the outlet. This basic amplifier module permits a selective and bearing signal reception by a capacity vote in connexion with the plug-on as well as revolvable power magnetic ferrite antennas. A fast and optimum signal bearing enables simple and user friendly application by only 3 control elements (frequency tuning, resonance setting, gain control). The resonance vote is affected via a precision air variable capacitor with an oh reduction from 1: 3. A mobile operation is with the accumulator luggage (No. VM/BP, 3 x AA- 1.5 V) possible. Technical data: Frequency tuning 20 kHz to 15 MHz, reinforcement controllablly to 22 dB, in 2 steps insertable matching capacity, active booster low-noise integrated operation amplifier, control connector BNC socket, link for ext. Power pack or accumulator, connection magnetic ferrite antenna over professional Neutrik© plug's with 1/4" jack's, plastic housing, dimension (BxHxT), 100 x 70 x160 mm, weight about 400 gr. Optionally: Power magnetic ferrite antennas for the ranges 20-100 kHz, 100-500 kHz, 500-2900 kHz, 2900-15000 kHz.