Links
The following is a list of links to websites that I have found informative and entertaining:
http://www.vintage-radio.com Paul Stenning's extremely comprehensive site.
http://www.TheValvePage.com John Evan's ever growing and most amusing pages.
https://web.archive.org/web/20070822043040/http://www.dundeecoll.ac.uk/Sections/CS/Staff/al_radio/ Alan Lord's useful site and forum (archived)
http://www.r-type.org/ The National Valve Museum
http://www.qsl.net/ve3bdb/ All you ever need to know about the WS No.19!
https://groups.io/g/wireless-set-no19/ The Wireless-Set-No19 group
http://www.royalsignals.org.uk/ The Wireless-Set-No19 document archive site
http://www.vmars.org.uk The Vintage and Miltary Amateur Radio Society.