G glip22 Well-known member Jan 25, 2013 #21 Looks cool. For 500 I think you can do better with an actual tester that reads transconductance. This cannot match tubes unless it does so at high plate volts over 400.
Looks cool. For 500 I think you can do better with an actual tester that reads transconductance. This cannot match tubes unless it does so at high plate volts over 400.
