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   rec.audio.tubes      Tube-based amplifiers... that go to 11      52,877 messages   

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   Message 51,904 of 52,877   
   GRe to Charles   
   Re: Mystery transformer   
   25 Oct 12 10:50:23   
   
   From: mynamespacedbydots@xs4all.nl   
      
   "Charles"  wrote in message   
   news:k69kbt$cbk$1@dont-email.me...   
   >   
   >   
   > "GRe"  wrote in message   
   > news:5087c1e5$0$6871$e4fe514c@news2.news.xs4all.nl...   
   >   
   > 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???   
   >   
   > Telephone application?   
      
      
      
   Could be! Maybe Western Electric?   
      
   Not mentioned in yesterday's post; there is a print   
   in white characters on top of the transformer.   
      
   Print: WE1612??   
           6  420   
      
   The last two characters of the first line are too vague to read.   
      
   Do you know they used indification no's with "WExxxx"?   
      
   Regards,   
   Gio   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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