Glow in the Dark Audio - Vacuum Tube Valley 6B4G Monoblock Tube Amplifers
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
Vintage Audio. Vacuum Tube Valley VTV Issues 1-20 compl. HQ Scans in PDF on CD | eBay
How do we test and evaluate our valves [tubes] ?? | ivanrichards
VACUUM TUBE VALLEY: 90's and 00's tube technology
Vacuum Tube Valley tube tester Photo #770631 - Canuck Audio Mart
How do we test and evaluate our valves [tubes] ?? | ivanrichards