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Mystery transformer
Some time ago I found a small transformer in the junkbox.
It looks old, like from the forties or fifties era. I don't remember where it came from or was cannabilized from. Anyway, today I took the trouble to measure it. 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??? TIA & regards, Gio |
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