Helios Electronics archive
When Dick Swettenham passed away in 2000, as his executor I was entrusted with a large collection of documents relating both to his Helios Electronics company and his personal interests that needed sorting and cataloguing and it's only recently that I've had the time to do this.
I have started to build up an historical archive of information relating to the work Dick and the Helios company did - see the links above.
If you want to contact me, for the time being please use the form on the Helios Professional Audio website.
Crispin Horsfield, Bristol, June 2019