Daventry experiment Chain Home

this morris commercial t-type van, used portable radio reception testbed, later refitted daventry experiment. shown in 1933, being operated jock herd.

the letter seized on committee, released £4,000 begin development. petitioned hugh dowding, air member supply , research, ask treasury £10,000. dowding extremely impressed concept, demanded practical demonstration before further funding released.

wilkins suggested using new 10 kw, 49.8 m bbc borough hill shortwave station in daventry suitable ad hoc transmitter. receiver , oscilloscope placed in delivery van rrs had used measuring radio reception around countryside. on 26 february 1935, parked van in field near upper stowe , connected wire antennas stretched across field on top of wooden poles. handley page heyford made 4 passes on area, producing notable effects on crt display on 3 of passes.

observing test watt, wilkins, , several other members of rrs team, along rowe representing tizard committee. watt impressed later claimed have exclaimed:

rowe , dowding equally impressed. @ point watt s previous agitation on development became important; npl management remained uninterested in developing concept , happy allow air ministry take on team. days later, treasury released £12,300 further development, , small team of rrs researchers sworn secrecy , began developing concept. system built @ rrs station, , moved orfordness over-water testing. wilikins develop receiver based on gpo units, along suitable antenna systems. left problem of developing suitable pulsed transmitter. engineer familiar these concepts needed.

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