Kleinfunksprecher d - "Dorette"
 

This was the last new transceiver designed in the Third Reich. The Germans started producing the "Dorette" in October 1944, seven months before the end of the war. This was a small transceiver that was designed to communicate with the Torn. Fu. d2, 10 W. S.c and the Feldfu. f backpack transceiver.

Charles Barger's book "Communications Equipment of The German Army" describes this set below:

The Kleinfunksprecher "d" is a highly compact small portable infantry transceiver capable of operation on Tn (Voice) communication. it can be used in networks with the German radio sets Torn. Fu. d2, Torn. Fu. f, and 10 W. S.c.

The set consists of two parts: the apparatus case, worn on the operator's left shoulder strap, and the battery box worn on the operator's belt.

The following items make up the set: one 1.6 meter band antenna, the receiver/transmitter, battery box, hand and throat microphone, headphones, transport case (Tpka), and instruction booklet D-1037/5.

As requested, I have photographed the battery box in greater detail. Here is the LINK

 
Specifications
 
FREQUENCY RANGE:
32.0 - 38.0 MHz (7.9 - 9.4 meters) Calibrated in channels and kilohertz
NUMBER OF CRYSTALS:
0
PRESET FREQUENCIES:
ANTENNA:
1.6 meter band antenna
TUNING:(MO OR CRYSTAL)
MO
SENSITIVITY:
SELECTIVITY:
POWER SOURCE:

1.4 volt filament battery (LS 1.4 bp)

150 volt anode (B-) battery (LS 150 bp)

Duty Cycle: 25 hours in normal operation (20% transmitting, 80% receiving)

SIMILAR SETS :
POWER OUTPUT:(WATTS)
approximately 0.2 Watts
TUBES (TYPE and NUMBER):

3 tubes.

2 x RL 1 P 2

1 x DDD25

USE:
Radiotelephony in simplex mode. Can be used both stationary and on the move. Point-to-point traffic; net operations.
TYPE OF SIGNAL:
Tone and voice, amplitude modulated
RANGE: (Kilometers)

Between two Kleinfunksprecher "d"s or between one Kleinfunksprecher "d" and one Torn. Fu. d2 is 2 - 4 km.

Between Kleinfunksprecher "d" and 10 W. S. c using Ukw. E. e is 2 - 4 km (while moving).

Between Kleinfunksprecher "d" and Feldfu. f is 1 - 2 km

TO COMMUNICATE WITH:
TO REPLACE IN PART:
 

 
This is my newest acquisition - a complete Dorette set.

 

 
The Dorette with original battery box and cable - a surprisingly rare combination.

 

 
Rear view of the Dorette/battery combination.

 

 
The open battery box.

 

 
Instructions

 

 

The right side with operating instructions, and window showing the current frequency setting. Above the window the marks are (<- 100 KHz / Channels of Torn. Fu. d2).

Instruction Manual !
For operation on the move: Fasten the transceiver onto the left side carrying strap on your chest, and fasten the battery onto your belt with the leather strap.
For stationary operation: Screw together the battery case and the transceiver. Stand them up.
Connect the power cable, antenna, microphone and headphones.
Transmit: Set the spring to a horizontal position, then press and set the desired frequency.
Receive: Do the same as with transmitting. Listen for a receiving station within range.
Do not change any settings while communicating.
Also refer to manual D-1037/5

 

 

 
Porcelain antenna isolator, and ground connector.

 

 
The right side of the "Dorette" with the cover off.

 

 
....The left side of the "Dorette" with the cover off.

 

 
"Dorette" reverse, showing the DDD25 dual-purpose pentode.

 

 
"Dorette" from the top. The antenna contact can be seen here. Also the tuning groove can be seen of the iron dust core of the only tunable coil in the unit (HF stage).

 

 
The "Dorette" schematic diagram. Note the DDD25 tube's dual use.

 

 
The open box.

 

 
Transceiver compartment.

 

 
Battery compartment.

 

 
Lid detail.

 

 
Outside stamp.

 

 
Antenna.
 
 

 

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