UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Vintage Radio and Phonograph cutter schematic

ms660 · 3rd Nov 2019, 4:51 pm

No, don't bypass the field coil of the internal loudspeaker, that winding is essential for the proper operation of the unit.

An external loudspeaker can be used plugged into the jack socket provided.

That will disconnect the internal loudspeakers voice coil, the external loudspeaker can be either of the permanent magnet type or the electrodynamic type, if an electrodynamic type is used it will have to have its own field coil supply.

Lawrence.

3rd Nov 2019, 4:51 pm	#47
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Vintage Radio and Phonograph cutter schematic No, don't bypass the field coil of the internal loudspeaker, that winding is essential for the proper operation of the unit. An external loudspeaker can be used plugged into the jack socket provided. That will disconnect the internal loudspeakers voice coil, the external loudspeaker can be either of the permanent magnet type or the electrodynamic type, if an electrodynamic type is used it will have to have its own field coil supply. Lawrence.