From: bill.sloman@ieee.org   
      
   On 31/12/2025 8:31 pm, Liz Tuddenham wrote:   
   > Bill Sloman  wrote:   
   > [...]   
   >   
   >> Driven shields have been around forever.   
   >   
   > Since the mid 1930s, invented by Blumlein.   
      
   I worked at EMI Central Research for a couple of years (1976-1979), but   
   I'd heard of the Blumlein bridge even before that.   
      
   https://en.wikipedia.org/wiki/Alan_Blumlein   
      
   He died at age 38, and had his name on 128 patents. The IET has   
   published a biography, but it doesn't do him justice.   
      
   "The Life and Times of A.D. Blumlein" by Russel Burns ISBN 0 85296 773 X   
   and 978-0-85296-773-7   
      
   --   
   Bill Sloman, Sydney   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)