Thursday, January 20, 2011

Sperry Marine Radar MK 2

The Sperry Marine Radar MK 2 was a medium range, surface search radar which was designated High Definition Warning Surface (HDWS) set. From the early 1950's, until well into the 1970's, almost every ship in the Royal Canadian Navy was fitted with the Sperry Mk 2. Although its primary use was to locate other ships, helicopters, navigation aids and shorelines, it was very effective in detecting submarine periscopes. The Sperry MK 2 was fitted aboard HAIDA. After life expiry, the Mk 2 was replaced by the Sperry Mk 127E solid state radar.

Specifications for the Sperry Marine Radar MK2

Type: naval surface search radar
Vintage: May 1953
Operating frequency: 9375 Mcs +\- 45 Mcs
Peak power: 30 kilowatts
Pulse length: 0.25 microseconds
Pulse repetition rate: 1000 pulses per second
Scanner rotation  15 rpm
Beam Width: horizontal, 2 degrees; vertical, 17 degrees
Range markers: fixed 0.5, 2, and 5 mile intervals +/- 1%; variable, 0.3 to 20 miles +/- 2%
Range scales: 1, 2, 6, 15 and 30 miles
Resolution: range, 80 yards; bearing, 2 degrees
Indicator CRT size: 12 inch diameter
Power requirements: 115 VAC 60 Hz, 1000 watts
Dimensions and Weights: indicator, 27"D x 20"W x 51"H , 350 lbs; scanner, 20"L x 50"W x 49.5"H, 300 lbs; Tx/Rx, 26.5"D x 22"W x 17"H, 190 lbs; M-G Set, 36"L x 15"W x 12"D , 330 lbs
Contractor: Sperry Gyroscope, Great Neck, N.Y