CONVERSION TO DIGITAL MÄRKLIN 3670 WITH 5-POLE MOTOR AND SOUND DECODER Sadly all my pictures, showing the removal of all the old analog items were missed somewhere into cyberspace. But here are some facts concerning items used. 5 pole motor kit from Märklin no 60903. Decoder is ESU LokSound V4 M4, No 64400, Loudspeaker: ESU No50334.
Everything in place. Decoder in standing position center left.
Speaker positioned on layers of double-sided industrial tape, with its speaker cone turned invards.
As minus connection for the light bulbs, are used the blue cables from the decoder, not from the chassie, as they have different minus potential. Important. The old bulb holder with chassie "minus" is removed, and replaced by Märklin holder no 604180.