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EP2a   E-383N
Radio direction finder - this page is a stub

E-383-N was a radio direction finder, developed by Telefunken in Berlin (Germany) in 1933. The receiver is based on the Telefunken E-404-N, and is suitable for the 75 kHz - 3.3 MHz frequency range (90 - 4000 metres), divided over 5 bands. It is also known by Wehrmacht (Army) designator EP2a and by Luftwaffe (Air Force) designator Ln 26 588. The EP2a was also built in Switzerland.

The receiver could be connected to a variety of directional antennas, uncluding one that could be mounted on top of the device. The device itself could be mounted in an (intercept) vehicle, but could also be installed on an optional metal frame, making it suitable for outdoor field use.

The image on the right shows a typical EP2a receiver as it was restored by German collector Dieter Schudnagis (DJ4YS). After restoration, this EP2a was ready for its first field test, which was carried out in Gollhofen (Germany) in April 2016, as part of the 23rd Historical Radio Meeting. 1
  
Restored EP2a receiver in the field

The device in the image is extremely complete. It is mounted on the optional outdoor frame and is equipped here with a directional antenna at its top and an external speaker on a small platform at the rear. Also note the presence of a watch on the leather pad at the centre of the front panel.

During the field test in April 2016, the receiver behaved extremely well. Despite the early time in the year, the weather was much better than expected when the test team set the receiver up in a field west of Gollhofen, early in the morning.

After installing the EP2a/N383N on its frame and mounting the large window antenna on the big rotatable base, the receiver was switch on and was soon able to acurately pinpoint the direction of an LW test transmitter that was placed several kilometres away. In the image on the right, the test panel is plotting the direction on a map.
  
Gathered around the map in order to establish the possible location

The field test was a great success and it was a wonderful opportunity to see this device that was built in 1936, operating in its full glory again in 2016, exactly 80 years after it was made. Many thanks to Dieter Schudnagis for restoring the device with such a great sense of detail, bringing it to the HAM radio event in Gollhofen and for allowing us to take photographs of it.

  1. Treffen des Funkhistorischen Interessenkreises (Meeting of the Radio Historical Interest Group). The 23rd meeting of this club was held in Gollhofen (Germany) from 28 April to 1 May 2016.

The optional metal frame Unfolding the antenna Mounting the antenna base Antenna base Dieter Schudnagis with his EP2.a Restored EP2a receiver in the field Gathered around the map in order to establish the possible location Some of the people involved in the test
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The optional metal frame
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Unfolding the antenna
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Mounting the antenna base
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Antenna base
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Dieter Schudnagis with his EP2.a
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Restored EP2a receiver in the field
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Gathered around the map in order to establish the possible location
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Some of the people involved in the test

Variants
  • E 383 N
    75 - 3333 kHz
  • D 468 N
    300 - 600 kHz
  • E 538 N
    75 - 750 kHz
  • E 405 N
    LW (for use aboard U-Boats)
Names
  • E 383 N
    Telefunken
  • EP2.a
    Wehrmacht
  • Ln 26 588
    Luftwaffe
Documentation
  1. Peilempfänger EP. 2 - Manual (German)
    Date unknown. Obtained via [1].
References
  1. Deutsche Luftwaffe, Archive
    Retrieved December 2016.

  2. Martin Bösch, Peilempfänger E383N / EP2N
    Retrieved December 2016.

  3. Dieter Schudnagis (DJ4YS), EP2.a featured on this page
    30 April 2016.
Further information
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Crypto Museum. Created: Saturday 24 December 2016. Last changed: Saturday, 05 August 2017 - 09:50 CET.
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