Vacuum Tube Valley magazines RARE Complete Set (20 issues) including #1 -the tube Bible For Sale - US Audio Mart
Vacuum Tube Amplifiers by Valley and Wallman 1948 PDF on CD | eBay
Audio Video Choices - All issues of Vacuum Tube Valley Magazine are available for free download: https://web.archive.org/web/20130604042043/http://www.jumpjet.info/Pioneering-Wireless/eMagazines/VTV/vtv.htm | Facebook
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The Cool Sound of Tubes - IEEE Spectrum
VACUUM TUBE VALLEY: 90's and 00's tube technology
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All 20 issues of VACUUM TUBE VALLEY magazine are available for free download