Wow, thanks for that incredibly valuable pointer. My copy just arrived, and it's fabulous; it documents in great detail a part of the story that's little-known, which is the industrialization of the early radar work. There are a number of books from people on the research side (Watson-Watt, Bowen, etc), but not much on the industrial side. There is an obscure book: Frank Rowlinson, "Contribution to Victory: An Account of Some of the Special Work of the Metropolitan-Vickers Electrical Company Limited in the Second World War", Metropolitan-Vickers Electrical Company, Manshester, 1947 (which covers a lot of stuff, not just the radar work), but it doesn't have a lot of technical detail. What it _does_ have a lot of large, excellent B+W photos of the early CH, CHL etc transmitters (which MetroVick built), but not much technical detail of them. That book, and Brown's book, are a marvellous pairing, since he has the detailed description, but no images! A very complementary pairing. Noel