Final Tubes Directory - Listing of what tubes are used as the RF final power amplifier stages in various transmitters. - http://www.muchstuff.com/xmttube2.htm
Peter's Vintage Radio Daze - Information, and links to international sites. UK. - http://web.ukonline.co.uk/p.foden/resource.htm
vintage radio links - Links to numerous sites of users and collector of old amateur radios. - http://www.qsl.net/ka4pnv/vrlinks.htm
Hampedia BA links - Many links to good BA sites here. - http://www.aade.com/hampedia/boatanchors.htm