On 20 Dec 2011, at 14:21CET, g4gvw wrote:

…

> These techniques, I recall, could involve using [… ] DC power supplies 
> obtained
> from his local town's street-lighting system. 

At one of the Belgian amateur radio conventions at Knokke (sometime in the 
1960s) I met ST2AR (I think that was his call sign).   He told me that before 
the war he managed the tramway system for Cairo and used its overhead supply to 
power his transmitter. It was alleged that when he put the key down the trams 
all slowed down.

John F5VLF/G3PAI/ex ON5YB/ex ON8IU