Rickresource Rickenbacker Forum

An amazing resource to tube information, including articles about the 12AX7, 6L6, EL34, etc.

http://www.tiffe.de/roehren/VTV/

https://web.archive.org/web/20130805141 ... TV/vtv.htm

Discover Magazine May 1987 Virgin Commie article
http://antiquesci.50webs.com/VirginCommies.htm

The Cool Sound of Tubes

https://spectrum.ieee.org/consumer-elec ... d-of-tubes

https://spectrum.ieee.org/ns/pdfs/08_98_tubes.pdf

http://www.geocities.ws/fg_audio/Archiv ... _tubes.pdf

Part of Chapter 4 from this book can be downloaded from
https://od.lk/s/OV8xMjUyMDMzMjVf/EndgameTubes.PDF
A lot of companies outsourced to Japan.

The Endgame in the Electronic Receiving Tubes Industry
Chapter 4
Declining Demand, Divestiture, and Corporate Strategy
By Kathryn Rudie Harrigan
http://tinyurl.com/nyxemmt