bernbrue
Well-known member
Hi everyone,
I would like to use these telefunken (?) transformers with the G1176 Comp.
http://groupdiy.twin-x.com/displayimage.php?pos=-1210
http://groupdiy.twin-x.com/displayimage.php?pos=-1207
They are from a Telefunken Dolby A Model 360 Unit.
The output trafo is described in the manual. The Output Transformer "has a 1:2 step-up, providing a maximum output signal in excess of +21 dBm into 600 ohms. Resistor R2 and capacitor C3 form a high-frequency damping network, which damps the 500 kHz resonance of the transformer. This high-resonant frequency is a consequence of the extremely low leakage reactance of the transformer, which is necessary to maintain a low output impedance (approx. 20 ohms) throughout the audio passband. The transformer secondary is connected to the output connector JM3, and is free from any earth connection " (Quote Circuit desciption)
There´s no info on the Input trafo. I copied the schematics for the Dolby A Model 360.
http://groupdiy.twin-x.com/displayimage.php?pos=-1209
Can anyone help and show me how to connect these trafos with the G1176 board? Here is the board overlay
http://groupdiy.twin-x.com/displayimage.php?pos=-1208
Regards
Bernd
I would like to use these telefunken (?) transformers with the G1176 Comp.
http://groupdiy.twin-x.com/displayimage.php?pos=-1210
http://groupdiy.twin-x.com/displayimage.php?pos=-1207
They are from a Telefunken Dolby A Model 360 Unit.
The output trafo is described in the manual. The Output Transformer "has a 1:2 step-up, providing a maximum output signal in excess of +21 dBm into 600 ohms. Resistor R2 and capacitor C3 form a high-frequency damping network, which damps the 500 kHz resonance of the transformer. This high-resonant frequency is a consequence of the extremely low leakage reactance of the transformer, which is necessary to maintain a low output impedance (approx. 20 ohms) throughout the audio passband. The transformer secondary is connected to the output connector JM3, and is free from any earth connection " (Quote Circuit desciption)
There´s no info on the Input trafo. I copied the schematics for the Dolby A Model 360.
http://groupdiy.twin-x.com/displayimage.php?pos=-1209
Can anyone help and show me how to connect these trafos with the G1176 board? Here is the board overlay
http://groupdiy.twin-x.com/displayimage.php?pos=-1208
Regards
Bernd