Background about the Wurzburg Radar
"The Würzburg radar was the primary ground-based gun laying radar for both the Luftwaffe and the German Army during World War II. Initial development took place before the war, entering service in 1940. Eventually over 4,000 Würzburgs of various models were produced."
VPRS.org on the Giant Würzburg:
"Giant Wurzburg radar units were used for fighter-control in the German defensive system against the Allied bombing offensive from 1942 until the end of the Second World War. The radar units were operated in pairs, one being used to track an Allied target bomber and the second unit controlling a defending German fighter. There were approximately 1,500 of the Giant Wurzburg radars that were built."