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From: John Woodgate
Subject: Re: Alan Blumlein site
Date: Sun, 15 Sep 2002 18:56:24 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sun, 15 Sep 2002 19:30:23 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Charles DH Williams
wrote (in ) about 'Alan Blumlein site', on Sun,
15 Sep 2002:
>In article , John Woodgate
>> >And some of it has been permanently lost. On last reading, there is
>> >still no public record of how the Germans produced an incredibly narrow
>> >radio beam to guide their night time bomber raids directly over targets
>> >in England.
>> That's surprising; many of the antennas were captured. I note that you
>> say 'public record'. It's not easy to understand why that information
>> should still be classified.
>It isn't much of a secret as a web search for 'X-Gerät' or 'Knickebein'
Does the web search actually disclose the *beam-forming arrangement*,
which is what the OP says is still classified? IIRC, these systems
worked at around 1 MHz = 330 m wavelength. You would need a BIG
conventional antenna to get a narrow beam at that wavelength. Think 3 km
= 2 miles!
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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