On Wednesday 6^th November Lincoln Short Wave Club had the pleasure of listening to Chris Lester, a Chartered Engineer retired from the microwave electronics industry, giving an illustrated talk on RAF Stenigot.  Chris informed us how RAF Stenigot formed part of the WWII “Chain Home” radar system, the world’s first integrated air defence radar system which was in operation between 1938 and 1955 and it continued in use during the Cold War as an Ace High a NATO communications relay station using Tropo. propagation. The system allows the NATO to send data from the north of Norway to southern Greece using large parabolic dishes to receive and re-transmit high frequency data to the next station in the system. Aces High was part of the early warning system to defend NATO of nuclear attack. The Aces High system was closed in the early 1990s. The buildings, masts and dishes have now all been demolished even though they were listed buildings.