Welcome to the warm and wonderful world of Vacuum Tubes

(a.k.a. The Valve)

Groove
Tubes

Dual-Triode
Evaluation
Altec Mic Preamp & Direct Box

Fender Hot Rod Deluxe Mods: Part-1

DIY Altec Kit Alternatives

Electro-
Harmonix

Dual-Triode
Evaluation
The Sound of Tubes
Explained
PART-1
12A?7 Dual-Triode
Vacuum Tube 
Evaluation Article
and Test Results
The Sound of Tubes
Explained
PART-2


AES 1996