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DATE OF DESIGN |
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1917. |
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FREQUENCY RANGE |
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1.8 Mc/s to 2.5 Mc/s. Two spot frequencies were allocated to each set [Type 12 and 13] typically in the region of 1.5MHz and 500kHz. Reception was achievable down to 70kHz. |
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POWER SUPPLIES |
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Rotary. 0.5kW. Revs 2250. 80V AC 150 c/s. Slightly enhanced supply for Type 13.! |
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RANGE IN MILES |
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N/K or N/A |
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TYPE OF SET |
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SPARK |
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WAVEFORM |
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N/K or N/A |
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METHOD OF PRODUCING OSCILLATIONS |
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N/K or N/A |
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WHERE USED/FITTED |
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The Type 12 is a low powered spark transmitter/receiver which was fitted into Flotilla Leaders as the Auxiliary Set for short distance communications when in company. It also has an emergency set which is integral. By using a revolving spark gap, the output spark frequency is 300 c/s.
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ASSOCIATED WAVEMETER |
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Standard Service Wavemeter designed by HMS Vernon. |
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FURTHER READING |
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IMAGES, PHOTOS, DOCUMENTS, SCHEMATICS ETC.(Click images to enlarge) |
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