pietro

Neumann Haufe Bv171 \ Bv172a info
« on: December 16, 2020, 07:37:30 AM »
Hallo , my tube cutting lathe computer stop working last week , so I found 3 transformer with primary open.
Luckly i found a rewinder that did the job for me...this is fine , but the others are very old ( 1959) so i will love to find some new production/equivalent  for the future....so better to know some specs better than my dc ohmeter...the chokes are in bad situation too...

Bv 171       prim 2700 ohm       
                 sec 540 ohm + 600 ohm

Bv 172a.    prim 2900 ohm
                 sec 42 ohm + 45 ohm

choke  Bv 129
          Bv 175

Didn't understand what happened, voltaged seems fine but now for safety i put a 63ma fuse I had  on the B+ primary , Let's see...

Any Help or papyrus will be super usefull!!
Pietro



 

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