From: "Ian Buckner"
Subject: Re: OT:Re: Digital divide by ten, 1949 style
Date: Wed, 25 Sep 2002 12:02:32 +0100
Organization: Agilent Technologies
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NNTP-Posting-Date: Wed, 25 Sep 2002 11:02:34 +0000 (UTC)
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"David Powell" wrote in message
> In article ,
> email@example.com (Joe Morris) in alt.folklore.computers wrote:
> >"Ian Buckner" writes:
> >>Long ago I once worked with a guy who did his MSc at Jodrell Bank
> >>radio telescope. They had very intermittent, severe interference.
> >>This was eventually traced to a furniture factory a few miles
> >>They were using a similar system for curing the glue used to
> >>the furniture.
> >>Instead of a pellet of plastic they put the entire piece of
> >>in the hot spot. The trouble was they made the chair part of the
> >>resonant circuit, and as the glue cured, the oscillation frequency
> >>varied and (with the right size of chair) swept across one of the
> >>the radio telescope was using. So there would be no interference
> >>months, until it was time to do a batch of just the right size
> >Thanks; I'll add it to my roster of spectrum-pollution stories for
> >astronomy presentions.
> >Question: what, if anything, could Jodrell Bank do about this
> >(And what finally happened?) Also, can you provide a time frame
> They had some clout with the regulatory authority. Amateur Radio on
> the 4 metre band was banned within a 50 mile radius of J.B. for
> years, Probably still is, but I lost interest 20 years ago.
> David P.
This may have been around 1970. I don't know the fix, but as David P.
JB wielded quite a lot of clout back then.