The first radar installation at Leeds Bradford Airport was an Ecko ARAA. It was replaced by the Decca 424 [originally designed and used as a marine radar] c1963/64.
The 424 [later became Plessey 424] was a splendid piece of engineering but with only a 3cm wavelength worked superbly as a weather radar not quite as superb for seeing aircraft during heavy weather! The 424 with its various devices for removing weather clutter and a tilting aerial [the ATCO needed two pairs of hands at times!] had a maximum range of 25 miles and also had a one mile range setting enabling it to see airfield movement activities although, of course, not approved for that purpose.
The Plessey 430 arrived at Leeds Bradford early to mid 70s. This provided better vertical coverage [as opposed to the single narrow beam of tthe 424] but again being 3cm wavelength was often badly affected by weather clutter. Later modifications to the 430 made significant improvement but not until the arrival of the Plessey Watchman was the weather clutter problem resolved for LBA.
With the LBA standard weather [cloudbase below the top of Murgatroyd's chimney, itself later replaced by a fish and chip restaurant!], SRAs to half a mile were the most important approach aid. SRAs were 'the norm' to Rwy 15/33 and 10/28. Of course the advent of the Watchman meant that LBA no longer had the half mile talkdown capability but did, by that time, have an ILS on both ends of the main runway. SRAs to half a mile had continued to be available on Rwy 28 until the Watchman arrived.
Those were the days!
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