Description
Object description
Box: Silver coloured square tin box with a lid. The corners of the box are folded over where the metal has been joined.
Cardboard Box 1 (Headphones): Metal headphones with 2 rounded disks attached to the end which would fit over the ears of the user. The words 'MULTITONE ELECTRIC CO. LTD. LODNON' engraved onto the surface of the circular ear pieces. Attached to the bottom of the ear pieces are green coloured textile wire that have black plastic and metal cylindrical attachments on the end where they would connect to another part of the equipment.
Cardboard Box 2 (Grey Metal Box): Rectangular grey coloured metal box with 6 screws along the top and bottom surfaces of the box. On the side of the box there are 3 small knobs that have the words 'REACTION' 'SENSITIVITY' and 'AE. TRIMMER' written near the respective knobs. There is also a large circular plastic dial that has the word 'TUNNING' written next to it. On one end of the box there is an area for 4 wires to be attached and a wire attached to this area. On the other side there are 9 metal rod protruding from the box. On the bottom surface of the box there is a black plaque with 'M.C.R.I. SERIAL No. 24302' written on it.
Cardboard Box 3 (Small boxes): 4 small grey rectangular boxes with 9 holes in the surface on the box. There are white stamps on the surface of each box. Each box has a dial reading on the side of it. 1 of the boxes is wider than the other 3 boxes.
Physical description
By 1942 the Germans were fully aware of the messages passed to various underground movements by the BBC as 'personal messages' & from H.Q.transmitter in London. Extensive jamming was implemented to counter this traffic. The M.C.R.1 set, designed by Major John Brown, Royal Signals, was a highly sensitive receiver which would cover long, medium, & short waves from 2000 metres to 19 metres. Four interchangeable coil units were plugged on to the pins at the end of the receiver & covered the full range. RT & CW could be received.It was powered by a special battery, or with a separate power supply, by AC/DC of 97 to 250 volts
History note
. The MCR1 receiver was delivered and air dropped in a 2-pound 'Huntley and Palmer' biscuit tin (Giving it the name 'Biscuit' receiver). The tin also contained the four coil units, 3 batteries, or 2 batteries with a power supply pack, 30 ft of aerial wire, and 10 ft of ground wire. Ten thousand of these sets were built and approximately half were supplied to the French Marquis and other guerrilla forces.