A Signal School First
NR89 ('Sutton' Tube). The first Microwave Radar local oscillator, developed by R W Sutton at ASE Extension, Bristol.
Based on principles originating in 1939 at Stanford University, USA, it gave tens of milliwatts output at frequencies around 3 GHz with an 8% tuning range. Samples were available in Autumn 1940, and used by H W B Skinner in his experimental S-band Radar at Swanage. (This also used Megaw's Magnetron E1189 and a 'Cats Whisker Crystal Mixer' made by Skinner himself).
In small scale production at ASEE, EMI and E K Cole from March 1941, it was used in early Type 271 Radar systems.
It is possible that this exhibit is incorrectly labelled as the NR89 has a very long drift space and this device does not. This exhibit may be a later version reflex klystron.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 170 mm tall.
This exhibit was last updated on 02 December 2007
NR89 ('Sutton' Tube). The first Microwave Radar local oscillator, developed by R W Sutton at ASE Extension, Bristol.
Based on principles originating in 1939 at Stanford University, USA, it gave tens of milliwatts output at frequencies around 3 GHz with an 8% tuning range. Samples were available in Autumn 1940, and used by H W B Skinner in his experimental S-band Radar at Swanage. (This also used Megaw's Magnetron E1189 and a 'Cats Whisker Crystal Mixer' made by Skinner himself).
In small scale production at ASEE, EMI and E K Cole from March 1941, it was used in early Type 271 Radar systems.
It is possible that this exhibit is incorrectly labelled as the NR89 has a very long drift space and this device does not. This exhibit may be a later version reflex klystron.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 170 mm tall.
This exhibit was last updated on 02 December 2007
In small scale production at ASEE, EMI and E K Cole from March 1941, it was used in early Type 271 Radar systems.
It is possible that this exhibit is incorrectly labelled as the NR89 has a very long drift space and this device does not. This exhibit may be a later version reflex klystron.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 170 mm tall.
This exhibit was last updated on 02 December 2007
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 170 mm tall.
This exhibit was last updated on 02 December 2007
This exhibit was last updated on 02 December 2007 |