Hi Paul I came across Gerald in the 90s when I was part of a 2-way radio
company, my oppo knew Gerald quite well from the FCS. He was a nice guy. One
of my local LFers worked for him as well. I have one of his Guiness barrell
cavities in my workshop. They are very good. The story was he insisted on
silver-plated Guiness kegs as they were the best quality material and
casting.
Alan
G3NYK
----- Original Message -----
From: "Paul Nicholson" <[email protected]>
To: <[email protected]>
Sent: Monday, April 11, 2016 10:07 PM
Subject: Re: LF: Re: Screening an LF Loading Coil
Takes me back to the 1970's when I was a student working for
Gerald David at Aerial Facilities in Chesham building these
things -
http://www.ingenia.org.uk/Ingenia/Articles/240
which worked incredibly well thanks to the ingenuity of some
people at Bradford Uni who designed the adjustable center
conductor of the cavity so that the overall temperature
coefficient of the 'barrel' as we called the cavities, was close
to zero. Bandwidths of a few kHz at VHF with insertion loss
of less than 1dB were normal.
Gerald was a wonderful larger than life character, I could
relate many stories about life at AFL in those days - not
least Gerald's specialised driving techniques applied to the
country lanes of Buckinghamshire. There were many jokes about
ensuring the barrels were empty and Friday lunchtimes at the
pub were generally devoted to that.
--
Paul Nicholson
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