03-11-2019, 04:41 AM
Steve;
What I have done in the past to replace the field in a field coil speaker was to mount the replacement choke on the basket of the P.M dynamic. In this case it was a Sparton console from around 1935, and the output transformer was mounted under the chassis, but in many cases there are extra holes on the speaker basket where you could mound a choke on the side opposite the output transformer, and even if there were not you could drill a pair in a convenient flat spot. Repairing the original is still preferable, but the Sparton's speaker was missing, which is a shame since it was probably an old Magnavox electrodynamic, or a Rolla.
Regards
Arran
What I have done in the past to replace the field in a field coil speaker was to mount the replacement choke on the basket of the P.M dynamic. In this case it was a Sparton console from around 1935, and the output transformer was mounted under the chassis, but in many cases there are extra holes on the speaker basket where you could mound a choke on the side opposite the output transformer, and even if there were not you could drill a pair in a convenient flat spot. Repairing the original is still preferable, but the Sparton's speaker was missing, which is a shame since it was probably an old Magnavox electrodynamic, or a Rolla.
Regards
Arran
