Wireless Equipment, Transmitter Type Forward Spark 20 Watt B Mk II, British
Dark grey painted fabric covered wooden box with brass fittings. 7282 in red paint on top. Lid hinges back to reveal two fabric insulated power leads attached to a brown composition two pin plug marked 6 VOLTS, circular knob marked TREMBLER ADJUSTER OPEN, and screwed on plate marked W.T. SETS FORWARD SPARK 20 WATT B.Mk.II FRONT TRANSMITTER PART B 80 METRES No1438. Circuit diagram and instructions for use on paper label, marked W.T. SETS FORWARD SPARK 20 WATT B, MK.II FRONT, TRANSMITTER, 80 (OR 65) METRES, attached to inside of lid. Brass over centre catch opens to rveal lower section of case, containing battery power pack, connected by fabric insulated wires, with brown composition connector marked PART A. A detached leather strap, for fitting to the outside of the box for carrying, is inside the case.
This Forward Spark 20 Watt B transmitter was introduced in to service in 1917. Also known as the 'Loop Set', it was used for forward communications. There were both Rear Stations and Front Stations sets, with two versions of each. There were also separate receivers for the Rear and Forward Stations. It was lighter, more compact and thus more mobile than previous designs. The transmitter had a fixed spark gap powered directly from an induction coil operating in a similar way to the BF Trench Set. The power for the stations was supplied by an accumulator and a 32-volt HT battery. The receivers were fitted with two French TM or British type R valves. General range for operation was from 2,000 to 3,000 yards. The set remained in use until the end of the First World War.
Instructions for Use :
1. Stick bayonet in ground with its flat in direction as instructed. Choose pair of antenna pins according to slope of bayonet.
2. Plug Part C into Parts A and B and plug Part B in to 6 Volt battery.
3. See that spark gap is correct accrding to spark gauge provided.
4. To ascertain whether Part A is sparking properly, plug in to Part B the Spark Tester in place of Part C. Adjust trembler to give good contact to Spark Tester.
5. In rain, cover Part A with Part D.
The Battle of Verdun (21 February-15 December 1916) became the longest battle in modern history. It was originally planned by the German Chief of General Staff, Erich von Falkenhayn to secure victory for Germany on the Western Front.
'Over The Top'. 1st Artists' Rifles at Marcoing, 30th December 1917, by John Nash.
Brothers Paul and John Nash were both commissioned as official war artists during the First World War - Paul from 1917 and John from 1918. Prior to becoming official war artists, both of the brothers had seen active service on the Western Front.
The trench warfare of the Western Front encouraged the development of new weaponry to break the stalemate. Poison gas was one such development. The first significant gas attack occurred at Ypres in April 1915, when the Germans released clouds of poisonous chlorine.