work with one of best chinese tube amp's transformer production manufactuer , in order to produce and customize the best transformers for our customer
Push-Pull Output power P2= 20wx2, 30wx2 or 40wx2 (B+=300V)
Match with: Push-Pull tube amplifier only, Not for single-ended tube amplifier!
Primary impedance: Raa =4.4k, 5Kohm or 6.6Kohm (or others)
EI 76x40(30w) Or EI 86x40(40w)
Iron steel: New Japanes Z11 0.35mm special for audio, magnetic flux 16000wb
Secondary Impedance: R2 = 0 - 4 - 8 ohm
Rate value for 2 tubes: Ip = 110mA so 55mA for one tube,
Max current: 30w is 100mA/chanel ; 40w is 150mA/Chanel
Frequence response: 20-55Khz + -1db
Efficacite N = 0.9
Inductance:> 120H
Size: LxWxH: 76x74x66(30w), 86x88x76(40w)
Net weight for a pair: 2.6kg-3.2kg(30w), 4.2kg(40w)
Package weight 4.5kg- 4.8kg 
