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Phil G4SPZ · 22nd Feb 2016, 10:10 pm

The 'paired' wires would appear to be a tapping on the secondary, perhaps to enable a better match when an external speaker is permanently connected, as this reduces the load impedance. The flexible wires shown on the circuit suggest that the best tapping could originally be selected by plug and socket.

I'd suggest using the outer wires and leaving the paired wires free and insulated from earth.

22nd Feb 2016, 10:10 pm	#43
Phil G4SPZ Dekatron Join Date: Apr 2005 Location: Bewdley, Worcestershire, UK. Posts: 4,748	Re: HMV 653 Broadcaster all wave. The 'paired' wires would appear to be a tapping on the secondary, perhaps to enable a better match when an external speaker is permanently connected, as this reduces the load impedance. The flexible wires shown on the circuit suggest that the best tapping could originally be selected by plug and socket. I'd suggest using the outer wires and leaving the paired wires free and insulated from earth. __________________ Phil Optimist [n]: One who is not in possession of the full facts