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Dynamic Speaker Information
462ron
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#2

6 hours ago
The B.C. is the bucking coil or hum bucking coil. It’s in series with the output transformer secondary and the voice coil. It is wound along side the field coil and is there to introduce a small amount of AC out of phase with the AC or hum that the field coil causes to the speaker magnet, thus canceling out the hum heard. 

Ron
Bendix 0626.      RCA 8BX5.   RCA T64
Philco 41-250.    Philco49-500
GE 201.             Philco 39-25
Motorola 61X13. Philco 46-42        Crosley 52TQ
Philco 37-116.    Philco 70
AK 35                Philco 46-350
Philco 620B.       Zenith Transoceanic B-600
Philco 60B.         Majestic 50
Philco 52-944.    AK 84
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462ron - by 462ron - 6 hours ago



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462ron
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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration