¿Qué DIFERENCIA unas VÁLVULAS de otras?

If you love vacuum tubes, don't miss this unique and exclusive video! You'll learn how to build a vacuum tube to your desired specifications. You'll also understand what makes two tubes like the PL504 and the EL84 so different. 0:00 What differentiates vacuum tubes? 1:07 Amplification factor 4:53 Anode current 7:58 Transconductance 8:43 Simpler formulas Music: Acoustic Meditation and Acoustic Guitar #1 (Audionautix)