OPTs for tube audio amplifiers, item code : HX-6530EG- Important Notice : I do not accept any returns because I tested this item throughly. There maybe minor tolernce however it works flawlessly. I am not responsible for any item loss/damage/delay during transportation. insurance and tracking included. - I do not reply emails on Friday afternoons, Saturday, Sunday and official Canadian holidays- I ship within 3 business days of cleared payment. please wait with patience- home made : designed, assembled, severely tested in my workshop as pictured. please watch youtube video for details.- quantity : 1 pair(2) HX-6530EG- 2 Electro Harmonics EL34 and 1 12AU7 were used to test. The same OPTs are used for my amplifier(F/M-K3), please check it.- test circuit : phase splitting circuit is omitted because audio generator has + and - phase output. UL connection. - output power(in rms) : 30W @ Ultra Linear mode, fixed bias, 1% THD, 1KHz. - frequency response : 20Hz(-3dB) ~ 20KHz(-1dB) at full power/No NFB. If you apply 3~6dB NFB, Frequency response and THD will be much improved than I got.- primary impedance between P1~P2 : appr. 6.5Kohm- 40% ultra linear taps(SG1 and SG2) - secondary impedance : 6, 8 ohm- Si-Fe core and coil are made in S. Korea. insulation destruction temp. is 150 degrees in Celsius(coil)- impregnated in chemical solution. please see the detailed photos, there could be physical defect(paint on covers flaked off or damaged)-Kích thước đơn vị Hiển thị ở trên là metric(mm).-trọng lượng: appr. 1,9 kg / mỗi-cảm ơn bạn đã xem
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