Yes, some good stuff there – interesting articles too. The following sites may also be of interest to folks wanting more background info on tubes, their history, technical info or wanting to buy them.
o https://www.valve-museum.org
o https://www.tubesandmore.com/
o https://users.iglide.net/hworth/radio/precision.html
o https://www.xs4all.nl/~tgale/antradio/valves.html
o https://www.tubecollector.org/
o https://www.pamandandy.demon.co.uk/valves/
o https://www.vacuumtube.com/
o https://www.tubewizard.com/
o https://www.geocities.com/rxtxtubes/pa01000.htm
o https://www.audiotubes.com/speaking.htm
o https://www.radiotubesupply.com/
o https://store.tubedepot.com/
o https://www.vacuumtubes.net/
o https://www.tubeworld.com/index_high.htm
o https://thetubestore.com/index.html
o https://www.users.qwest.net/~tubes/
o https://members.aol.com/etetubes/
o https://www.cjseymour.plus.com/elec/valves/valves.htm
o https://www.tubedata.org/
o https://tubes_tubes_tubes.tripod.com/tubestubestubes/
o https://www.nostalgiaair.org/Tubes/
o https://www.radiomuseum.org/dsp_searchtubes.cfm
o https://www.tone-lizard.com/Tube_Testers.htm/
o https://www.flashbacksales.co.uk/wilsonv … vindex.htm
I will also make a post in the reference section and will include some references to tube texts etc there also.
Gerry