Learning Center & FAQ
1. Identifying Vintage NOS Vacuum Tubes by Brand, Country and EIA Codes
2. Randy Miller's 6T9 Compactron Vacuum Tube DIY Audio Amp - Instructions & Schematic
3. Asa Patterson's Investigation on the use of Numutron (Nixie) Tubes as Triodes for Audio
4. Howard Rose's Journey on Restoring a "Lost Cause" Vintage Gibson GA19 RVT Falcon Tube Amp & A Word on Inconsistent Schematics
Links to Resources & Trusted Websites