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RussianAudio recorders Televisions, video Tube radios NEW Other rarities My works

 

Minifon P55 L (1957)

   

 

Used Google translator

      Minifon P55 L Portable lamp wire recorder. Made in Germany by "Protona GmbH"; Hamburg. Recorders Minifon P55 produced from 1955 to 1960, but this unit was made apparently in 1957. It is a transitional model between the first series of the type recorders Minifon P55 "Plexi", who had a plastic body, and later Minifon P55, manufactured in the magnesium alloy. The machine used in the construction of "Plexi" and magnesium alloy body from later versions of P55. Go to the metal housing occurred in 1957. It is known that the Minifon P55 in 1955 sold for $ 289.50.
     Dimensions of the recorder 177 x 102 x 40 mm. Weight 650g without batteries. As the magnetic media used wire from a special magnetic alloy with a diameter of 0.05 mm or 0.038 mm. Wiring is collected on three subminiature radio tubes (see the wiring diagram at the bottom), and therefore the power required for three different voltages. Engine 6 - 12 v, the anode voltage - 30 v, filament - 1,5 v. The engine has an electromechanical speed stabilization. On the shaft of the engine is a centrifugal regulator. Electric stabilizer consists of several parts, one of which - the diode engine protection. The active element of the stabilizer is a miniature light bulb. During operation, the block head moves up - down, putting wire evenly on the spool. Combined with good stabilization of the rotational speed of the engine, it helps to minimize distortion of records related to the unstable rate of the wire. There is a hitch-hiking. When the coil wire ends, it pressed the lever is released. This lever, in turn, presses the power circuit breaker, located beneath the coil. When triggered, auto-stop turns red indicator light.
     The internal construction of the Minifon P55 L is markedly different from the later models P55, but repeats the design of early Minifon "Plexi". In particular, as in the "Plexi", plug the external power launched into the side wall of the body, and bearing shaft mounted reel table directly into a plastic deck. All the details can be seen by comparing the photo of this unit with more recent models in the pages of Minifon P55 and Minifon Protona Special. There you can read the other information on these recorders.
     Externally, the device is preserved very well. Inside, all was well in place, not counting the fact that old age is completely destroyed Belts and tires roll fast.
After lubrication mechanics, replacing the rubber belt and rubber roller rewind, the unit works well.

Video review

Photos can be enlarged

     

 

On the left is seen the external power plug all of the side wall of the housing

                   

 

     On the left is visible from the demolished old tires roll fast and well-preserved main roller of large diameter. It is interesting that this defect is present in all my existing machines Minifon. Everywhere was destroyed rubber roller rewind, but in excellent condition was the main rubber roller of large diameter.
     In the photo on the right installed a new rubber belt and rubber roller is replaced by fast.

 

In the photo at the bottom of the speed selector. Left switch in the increased speed for recording music, and the right-lapse recording speech.

 

As an accessory to recorders made Minifon desktop speakers with an amplifier, combining the functions as a microphone and transmitter for non-contact recording from the telephone. For more details about their designs on the pages can be Minifon P55-Speaker and Minifon Attache-Speaker

 

The original batteries for recorders Minifon

   

Wiring diagram and specification Minifon P55. Photos from the book by Roland Shellin "Minifon Spy in your pocket", (Roland Schellin, "Minifon Der spion in der tasche").
 

Operating Instructions Minifon P55 (1955 - 1957)

Specification Minifon P55

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Specification and price Minifon P55

 

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