GM70 output transformer
Frequency response 20Hz-20KHz at -0.7dB at full power
Very low static primary resistance (RDC) close to 80ohm
Low static secondary resistance (RDC) close to 0.3ohm
Primary inductance 54HIsecondary inductance 50mH
Turns ratio = sqrt (54H / 50mH) = 33x
Primary impedance 8700 Ohm – Secondary impedance 8 Ohm
X51D “C” core
External dimensions 135 x 125 x 120 mm – Weight: 5.5 kg
Good frequency response 20Hz-20KHz at -0.7dB at full power
Very low static primary resistance (RDC) near to 80ohm
Low static secondary resistance (Rdc) near to 0.3ohm
Primary inductance 54H
Secondary inductance 50mH
Turn ratio = sqrt(54H / 50mH) = 33x
Primary impedance with 8ohm is about 8720ohm (33 x 33 x 8)
Air gap optimized for a bias current of 70-90mA
Very large double C core, external size 135 x 125 x 120 mm