alternatehistory.com

What if Churchill insists that only Canada can have the Tizard mission data and samples. No word of advanced jet research, plastic explosives, multi-cavity magnetrons, reflex klystrons and the French nuclear memorandum (Frisch-Peierls) that implied a nuclear bomb (There were blueprints and circuit diagrams for rockets, explosives, superchargers, gyroscopic gunsights, submarine detection devices, self-sealing fuel tanks too).

What would follow from that in terms of the limits of Canadian research and production.
Northern Electric Ltd made quite a few radar sets, but this would be a fraction of US production even if expanded.

Differing relations with the US government?
A bit more suspicion, but More and better radios as American electronics industry concentrates on what it knows?

Still a post war economic boom for the USA?
Would the computer come to light or remain secret? Would America be a nuclear power? British radar targeting and air warning rules the waves? Greater consumer electronics boom in the empire?

http://www.cap.ca/wyp/profiles/Redhead-Nov01.PDF

BBC: The World In A Briefcase

In the summer of 1940, the war with Germany was at a critical stage.
France had recently surrendered and the Luftwaffe was engaged in a concerted bombing campaign against British cities.
The United Kingdom was being cut off from the Continent, and without allies to help her, she would soon be near the limit of her productive capacity - particularly in the all important field of electronics.
On the morning of 29 August, a small team of the country's top scientists and engineers, under the direction of Sir Henry Tizard and in conditions of absolute secrecy, was about to board a converted ocean liner.
With them they carried possibly the most precious cargo of the war - a black japanned metal deed box containing all of Britain's most valuable technological secrets.
They were on their way to America - to all but give them away.
This high-powered team included representatives from the Army, Navy and Air Force, along with specialists in the new technologies of war.
Top