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| 1 - Unknown. This could be the correction unit to convert the Relative bearing to a True bearing so that the top of the PPI is always north; 2 & 3 - Receiving Panel L53; 4. PPI Display Unit, Design 34; 5. Control Unit |
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| Closeup of PPI display. On HMCS HAIDA, the 293 equipment was located on the port side, main deck at the break in the foc'sle. The operator was in the shack with the equipment. Sound powered telephones were used for reporting target bearings to the Operations Room. |
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| 1 - Transmitter Unit 9T; 2 - Waveguide to antenna; 3
- Signal Generator Noise 4 - Spectrometer Cavity Resonator Unit;
5 - Spectrometer Display Unit; 6 - Wave monitor G86; 7
- Rectifying and Modulating Panel 3CC; 8 - Air Conditioning (Dryer)
Unit; 9 - Soundproof cabinet for blower assembly.
Tom Estabrooks, a 293 radar operator, served in HMCS Haida on one of her tours of duty to Korea. He recalls. "Item 8 is actually a two section air dryer for the waveguide. Each section contained a quantity of silica gel, a substance which has a propensity to absorb moisture. When the the gel turned pink, that indicated it was time to switch over to the other dryer. That was accomplished by moving the lever on the front panel from one side to another. Years later, it was determined that the radar reception was not affected even when using untreated air. While at sea, I can't remember the number of times that I changed that lever over. But anytime I forgot, I got a blast from one of my superiors". |
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