Feldfu. b2

(Feldfunksprecher b2)

This is a portable transceiver unit, was manufactured by the Staru in July 1944. This family of transceivers included the B, B1, B2, C, D, F and H . The major difference between all of these models is the frequency range in which they operate and power output. This b2 model operates in the 90.57 to 109.45 MHz range. With the Feldfu.b2 case being constructed from bakelite, this transceiver is very light weight relative to other radios of that time.

General Information:

Feldfu. A1, B, C, and F are portable, compact, 2-way radiotelephones. They have a common tuning element for transmitting and receiving. Two sets to communicate with each other must be tuned to the same frequency. Obstacles - even men in the line of transmission - seriously affect communication.

Feldfu. a1 has a sheet-iron container with a carrying handle, straps for carrying on the shoulders, and removable bags for accessories. The container holds the transmitter-receiver, one hand-microphone, one battery (2 B 19) and one 90-volt plate battery. The accessories bag holds one pair of headphones, one throat microphone, two short rod antennas (one spare) each consisting of two rods approximately 12" long which fit into each other . The antenna bag holds one long rod antenna consisting of 3 rods each approximately 24" long which plug into each other, two guy lines and two tent pins.

Feldfu. B and C have containers with special fittings so that the equipment can be carried on the back. Both types B and C are easily identifiable even in the dark, the B type having embossed red marks on top of the container, while type C has only one mark (green) in the same place. The container holds the transmitter-receiver, rod antenna, (in two sections) 32" long (marked red) for type B and 28" long (marked green) for type C, one battery 2.4 NC 2B, one operating attachment, one remote cable (type B), one laryngaphone (type C) and one pack pad.

The Feldfu.b2 is described as having a removable harness by which it can be carried on the back of the operator. Method of operation is push-to-talk. After communication has been established two-way traffic can be maintained by pressing the microphone switch to transmit and releasing it to receive. A fresh battery will operate the set for up to 13 hours at normal temperature. The frequency range of this set is higher than that of any other tactical sets. The Feldfunksprecher b uses a storage battery for primary power, necessitating the use of charging equipment (HLS a).


Based on Fritz Trenkle's book "Die deutschen Funknachrichtenanlagen bis 1945" the Feldfu.b2 had somewhat weaker output power than its b and b1 predecessors, of only 0.1 Watt compared to their 0.15 Watts. Also, it was specifically designated for use by Panzergrenadiere. The Feldfu.b was designated for the infantry, and the Feldfu.b1 for engineers.
90.57 to 109.45 MHz (fixed settings 211-240).


30 for type b.

Rod used for both transmitting and receiving, varying in length from 2 feet in type a1 to 6 feet in type f.




Batteries for type a1, 1-2B 19, 1-90 v plate. For types b and c, 2.4 NC 28, WG 2.4a

Feldfu. a1, b, b1, c, d, f, h

(Watts) Types a1 and f, 0.15; types b and c, 0.12 , type b2 0.10


1 x RV 2,4 P 700, is NOT present in this set.

1 x RL 2,4 P 2 used as HF/AF amplifier and modulator

1 x RL 2,4 T 1 used as regenerative detector and power amplifier

Walkie-talkie used for tactical communication between battalions and companies. It may be operated while stationary or on the move. It is thought that the Feldfu.f is used by armored reconnaissance units.

Voice only.

Quoted are 0.8 for types a1 and f, and from 0.5 to 1.0 mile for types b and c.

It is though that type f will communicate with Ukw. E. e and 10 W. S. c


One man pack, or in vehicular.





Note the unusual grey paint on the frequency selector.








Original stencil.



Antenna base detail.



Radio removed - view inside the case.



Antenna and ground connector.


Battery power connector.



Rear lid detail.



Battery and accessory compartment.



Battery strap and cables.



Accessory compartment with power wire runners.



Right side of the radio - not bad for 1944.



Left side of the radio.



Low-frequency section cmponents and power connector.



Rear of the unit with the vibrating power supply still intact.



Top of the unit showing one of the three tank coils, the antenna and the ground connectors.



Uniquely WWII German manufacturing technique where the coil groove is machine-etched into the ceramic substrate.



Antenna and ground connectors. Note how ruggedly constructed they are.



Schematic at the bottom of the Feldfu.b2



Voltage and battery readiness indicator.



"The enemy is listening!" Volume control and frequency fine-tuning knobs.