First example of branch arm coupler on glazed ceramic (SYNTOX) together with four later examples on saphire. 1965/66 branch arm coupler 1965/66
Three units, first X-band balanced mixer, second production example of X-band mixer, third S-band balanced mixer. c .1950 balanced mixers circa 1950
Two unmarked packs of 5 pre-production Germanium Junction Diode semi-conductors, c.1950 Germanium Junction Diode circa 1950
Two experimental composite housings for circular branch -ARM coupler as used in J-band balanced mixers. c.1970 composite housing circa 1970
two pieces known as SHRIMP - 17GHz front end feature beam-lead gallium arsenide (GaAs) Shottky diodes. fisrt fabricated from six substrates, second fabricated as single MIC type VX4518 c1950 Shottky diodes (SHRIMP) circa 1972