.
1. EMISSION LABS®
2. AVVT 3. KT88 (history) 4. 300B (history) 5. Electro Harmonix
6. GOLD LION
7. VALVE ART 8. SOVTEK 9. SVETLANA 10. TUNG-SOL
11. NOS tubes
12. Blow out sales 13. Datasheets (external link) 14. Schematics (external link) 15. Tube factories
16. Transformers
17. Sockets 18. Tube Testers 19. Empty 20. Problems & Issues