The "Tragbar Schwere Funkstation / TS 40" (portable heavy wireless station) consists of the same components (transmitter, receiver, generator, rectifier, inverter as the "Fahrbar Leicht" / FL 40.
The complete material (500 kg) could be distributed on 23 loads which could be carried by a platoon of signallers on back frames or on six mules to be carried up the mountains.

The receiver of the wireless station FL40 was the Receiver Uster E41, a single / partly double conversion receiver with battery valves and coil sets for the different wavebands as found in the National HRO.	The TS40 transmitter comes in a huge case with carrying handles and ventilation holes at it's sides - it is portable, in the strict meaning of the word: You can carry it... The transmitter covers the longwave ranges 190-242 / 242-400 / 400-715 kHz and the shortwave ranges 1500-2300 / 2300-3300 / 3300-4500 kHz, a crystal permits to calibrate the set for 4000 kHz.

The TS40 uses a 10m mast (consisting of seven detachable segments) for shortwaves and a L-antenna erected between two 10 m poles for longwaves.

The station is powered from a petrol operated or electric motor that can be coupled to a special generator, the three phase electric power (50V / 150 Hz) is fed to a rectifier to generate the necessary plate / anode voltages of 300 and 1250 Volts for the transmitter and the anode / HT voltage of 120 V for the receiver as well as 6 V for the heaters and accumulator charger.
A inverter generates the necessary 120 V anode / HT voltage for the receiver E41 in case the generator is switched off or for remote operation of the station, a 6 V accumulator will also be used for heaters operation directly.

The 45 stations TS 40 have been in use from 1940 to 1967 with the mountain infantry, in mountain fortifications and signals intelligence units and has been faded out in 1971.