The invention relates to a yarn twist retention on an open-end spinning machine comprising a part of a wall of a bent yarn delivery channel forming the inner side of the bent section of the bent yarn delivery channel, this section of the wall of the bent yarn delivery channel on the yarn twist retention member being provided with at least one yarn twist retaining means. The antenna element comprises a first resonance frequency and a second resonance frequency. The use of this process greatly reduces the native oxides in the tip of the current emitter.