Sites I Highly Recommend.

https://www.valveheaven.com/
http://www.philipstorr.id.au/radio/index.htm (Phil Storr, a Helpful Bloke from S.A.)
http://avrs.org.au/ (Another Great Vintage Radio Club in Oz)
http://vwgc.org.au/ (The Vintage Wireless and Gramophone Club W.A.)
https://www.hrsa.org.au/ (The Historical Radio Society of Australia)
http://www.philcoradio.com/ (Ron Ramirez, Expert on all Things Philco)
http://www.vk2bv.org/radio/  (Waverley Amateur Radio Site)
http://www.nzvrs.pl.net/ (Vintage Radio Society from Across the Ditch)
http://www.hws.org.au/ (Historical Wireless Society from QLD, a Good Bunch of Blokes)
http://www.hrsasa.asn.au/ (Historical Radio Society / S.A. Branch, Lots of Solid Info)
http://www.wia.org.au/ (Wireless Institute of Australia, the Place to Get Your Ham Licence)
http://www.radiomuseum.org/ ( The Best Resource on  the Web for Circuits and Info)
http://www.qsl.net/vk2dym/index.htm/ (Colin MacKinnon, lots of Great Aussie Info)
http://www.vintage-radio.com.au/ (The place to go for vintage radio fanatics, lots of help available)
http://www.magiceyetubes.com/ (All the info you need on magic eyes)
http://www.tuberadio.com/  (Ray Robinson's Aussie vintage radio site)
https://sites.google.com/site/jmasterschematics/ (Bob Post's site with redrawn Amp circuits)
http://www.paradox.com.au/jcdalton/JCED15.htm  (John D'Alton's web site, some great history here)
https://www.mhelpdesk.com/field-service-management-guide-telecommunications-timeline/
https://Maker.Pro/  (Some fantastic projects and general hobby information.)
http://www.allaboutcircuits.com/  (Great tips and projects to keep you busy for days, or weeks, or months)
https://www.americanradiohistory.com (Huge amount of information on this site)
https://www.valveheaven.com/
https://control.com/ (Huge quantity of links and free resources for the tinkerer)
www.titlemax.com/articles/the-history-of-the-car-radio/ (Kindly provided by Grace Coleman and Nicole from The New Hampshire STEM Club for Girls)