DATE OF DESIGN

FREQUENCY RANGE

1.5 - 3 Mc/s (low power) and 3 - 19 Mc/s (main power).

POWER SUPPLIES

Supplied by either A.C. Supply Outfit DXA or from Power Board and Motor Alternator.
a. 180 volts 500 cycles.
b. 230 volts 50 cycles.
c. 220 volts D.C.

POWER TO FINAL STAGE.

TYPE OF SET (VALVES USED)

WAVEFORM

CW and MCW (Low power transmissions on CW only).

ASSOCIATED WAVEMETER

GR or GY.

METHOD OF PRODUCING OSCILLATIONS

WHERE USED/FITTED

Main transmitting set fitted in submarines for Ship-Ship and Ship-Shore communication. Also fitted in large ships and small ships in different variants:
55M (first modification) - Submarines Taku, Talisman, Tarpon, Tetrarch, Thetis, Thistle, Tigris, Torbay, Triad, Tribune, Trident, Triton, Triumph, Truant, Tuna.
55X (first experimental set) - Submarines Undine, Unity and Ursula.
55V ( the V signaifying either Leaders or small craft of between 500 and 3000 tons) - Gunboats Aphis, Cicala, Cockchafer, Falcon, Gannet, Gnat, Ladybird, Moth, Peterel, Robin, Sandiper, Scarab, Seamew, Tarantula, Tern.
55CH (CCS - Central Control System and HF Portion only fitted) - Cruisers Bonaventure, Dido, Euryalus, Hermione, Naiad, Phoebe, Sirius.

FURTHER READING

IMAGES, PHOTOS, DOCUMENTS, SCHEMATICS ETC.

Photographs, Schematics and Details of Type 55

NOTES.

No voice facilities are available.