BR 222 Notes on W/T Sets

1932 Edition - Known throughout the Fleet as "The Twicer"

© RN Communications Branch Museum/Library

The following have been taken from BR222 1932 Edition (British) and BR222 circa 1946 Edition (Canadian). Due to the size of these two books the contents have been split up into sections. All extracts from the British Edition are highlighted (hyperlinked) in yellow whilst those from the Canadian Edition are highlighted (hyperlinked) in pink. A few sections are missing from the British Edition and it is hoped to find and publish these section in the future.

INDEX


Section	Content
Miscellaneous	Content, Distribution, Introduction, Corrections System of drawing circits, Colour systems, Symbols Nomenclature Stores Technical Instruction
Tuners	General notes on Tuners A4 A5 A7 A8 A9 A11 D/F Tuners A41 A42 A43 A44 A46 A47 Tuner A50
Tuner Amplifiers Receiver Outfits Detector Units	Tuner Amplifiers B3 B6 B9 B11, Quick Wave Change Condenser dials, B12 B13 Receiver Outfit C, List of Receiver and D/F Outfits Detector Unit E (Valve Board) Heterodyne Detector Units E25X E28X Tuner Amplifier B19 Tuner Amplifier B50
D/F Training Units	General Notes, F21 F22 F23
Wavemeters Buzzer Testers Oscillators Heterodyne Units	Wavemeters Pattern 1492B G2 G3 G6 G7 G8 G9 G12 G13 Wavemeters in Panels, G51 G52 G53 G56 G57 Wave Indicator G53 Wavemeter G56 Wavemeter G57 Wavemeter G61 G62 Wavemeter GN Buzzer Tester G21 Oscillators G31 G33 Oscillator G35 Heterodyne Units K5 K7
Amplifiers	Amplifiers LB MD M3B M4 M5 M9 M11 M13 Amplifier M50
Note Magnifiers	Note Magnifiers N9 N19 N20
Valves	Receiving Valves NR4 etc Transmitting Valves NT1 etc. Rectifying Valves NU1 etc.
H/F Receivers	Receivers Q2X, Q4 with Quench Unit P2, Q7 Receiver B28 Receiver B29 Receiver Type 66
D/F	General, Errors, Outfits SA, SD, SF, SGX Radiogoniometer S25 Sensefinders S41, S42 Semi Circular Correcto S61 Semi Circular Corrector S61 circa 1946 DF Outfit FM7 DF Outfit FM11/FM12
Auto Starters Machines Hand Starters	Automatic Starters sizes W, X, Y and Z Machines and Hand Starters Machines Auto Starters W X Y Z Hand Starters
Batteries A.C. Supply Outfits DC Supplies to W/T Offices	Batteries Batteries Battery Outfits Reverse Current Switches Reverse Current Switches Central Battery Wiring Central Battery Wiring AC Supply Outfits DC Supplies to W/T 0ffices
Transmitters 5 and 6	H/F Attachments (other than panels) 5C, 5D Emergency Sets and Spark Attachments 6D, 6E, 6F, 6G
Old Spark and Arc Transmitting Sets	Half kW. Types 2, 14, 15 and 16
Portable Sets	Portable Sets, Types 30, 30A, 30P
Transmitters including L/F Transmitters with H/F Attachments etc.	Power Supplies DC Supplies to W/T Offices Transmitter 4T Transmitter Type 31 Transmitter Type 34A Transmitter Type 35S Transmitter Type 36S, 36M Transmitter Type 37S,37M Transmitter Type 38S Transmitter ype 43 Transmitter Type 44 Transmitter Type 45 Transmitter Type 46 Transmitter Type 47 Transmitter Type 48 Transmitter Type 48 Transmitter Type 49 Transmitter Type 52 FH-FHV-CFH Transmitter Type 53 Transmitter Type 53 Transmitter Type 57D-DR Transmitter Type 57DMR Transmitter Type 60E/EM/ER/EMR Transmitter 60EM EMR Transmitter Type 87 Transmitter Type 89M Transceiver TBS Transmitter T1083 Transmitter Type TAJ Transmitter Type TBL Transmitter Type TW12A TW12B Transmitters Type TBM TBK Notes on Transmitters
H/F Transmitters	Type 71 75X Transceiver Type 87
R/T Transmitters	Types 81 83X
S/T Transmitters	Oscillators S/T Transmitters, Types 102, 104, 105, 105A, 106
Wa/T Sets	Types 401 402 403
Buzzer Outfits R/C Circuits	Buzzer Outfits and R/C Circuits Buzzer Outfits and RC Circuits
S/T Receivers	Hydrophones Marks IV & V, Tank Hydrophone RDH Mark VIII Hydrophone Installations Types 700, 702, 703, 706, 707, 708
Buzzer Outfits Aircraft Sets	D.P. Generator, Transmitter T21C, Wavemeter W3, Receiver Tf. Transmitter T48, Receiver R47, Transmitter Receiver ????, Wavemeters WX13. WX8
Care and Maintenance	Care and Maintenance