Minifon P55 - Speaker

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     Minifon P55 - Speaker. Desktop speaker with an amplifier for the two transistors  to OC38 type series recorders Minifon P55. Also in the speaker has a built-in microphone and coil - non-contact sensor to record from your phone. The coil has a resistance of 22.7 kom. The design consists of a base with a 4-pin connector, and a round body in which the speaker, amplifier, microphone, and the sensor records the telephone. The height of the collection of 105 mm, body diameter 85 mm, weight 350 g. The loudspeaker is connected to the recorder cable with two connectors. Mode switch on the front of the chassis.

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Coil - a contactless sensor for recording from the telephone wearing a magnet on the speaker

Crystal microphone attached to the inside of the grille to the speaker

In the case bases are filter capacitors supply

The electrical circuit of a desktop speaker for a series of recorders Minifon P55. And made other modifications that have some schematics and design differences. For example a version where the microphone was located in the building stands, but in the same speaker for recorders Minifon Attache as a microphone used by the speaker