Valvo AD1 AD-1 early power triode AVO tested 300b-2a3 Start Price USD 520.00 Current Price USD 520.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Sunday, November 23, 2008 End Time Friday, December 19, 2008 Location Check my other auctions See more about 'Valvo AD1 AD-1 early power triode AVO tested 300b-2a3' Description up for auction is 1 extremely rare Valvo AD1 made in Germany .  it test very strong on my AVO mk4 a little better than NOS specs which is 60ma plate current and 6ma/v transconductance . this tube test at : 80ma and 6ma/v . no short or gas . it in excellent condition . a wonderful early triode with double plate support . some say it better the WE300b in sound quality and better than any RCA 2A3 single plate . don't miss it. this best quality DHT I accept paypal or bank transfer . good luck . I will pack carefully double box if posible for safe shipping . Place a Bid!