Mystery transformer
"GRe"
Winding W1:
Rdc = 32ohm
Saturation at about 50V, W2 open
Inductance 8.82H @ 10V/50Hz
Inductance 6.58H @ 10V/100Hz
Winding W2:
Rdc = 29ohm
Saturation at about 37V, W1 open
Inductance 5.36H @ 10V/50Hz
Inductance 4.11H @ 10V/100Hz
Winding ratio N = 1.34
Impedance ratio = 1.79
F-response -3dB @ 27kHz with a 600ohm load on W2
+3dB @ about 80kHz with (almost) no load on W2
+22dB @ 186kHz resonance with (almost) no load on W2
Iron lamination dimensions 48x40x20mm
It's "tarred" and has NO airgap
Beside end taps, no additional taps on W1 and W2
What could the purpose have been?
Anybody any idea???
** Almost certainly it's a high quality, 600 ohms line driving transformer.
The primary impedance is about 1000 ohms and so suits cathode drive from a
small power tube, via a coupling capacitor.
Max operating level is about 10 volts rms, with 13 volts drive on the
primary.
Line receiving versions were usually fitted into a ( mu-metal) shielding
can.
.... Phil
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