Hola, Vicente. Welcome to the forum.

Do you realize that you can buy a digital locomotive much like yours brand new for 80 Euros? It's the 30000, the modern equivalent of the 3000, and it works pretty well.

Adding sound after you converted your loco to digital would mean starting all over again and buying a much more expensive decoder that would come with a speaker. Both would then have to be installed.

You are looking at a lot of money. Don't do it.

If you really like sound, and in a steam loco they are very nice, buy a brand new one.

(A word of caution, however: before you buy a Marklin steamer at a low price, like the 36244 for 200 Euros, find out what people are saying about it. I have its predecessor, the 36243, and it was not a good buy. It does have wonderful sounds, however. It is slow and the motor died within a year. Fortunately, the local Marklin shop here was able to replace it under warranty pretty quickly.)

Hope this helps.

Here is a picture of the 30000:

by opening the loco you should ascertain what type of circuit board is within the loco, I would recommend an ESU sound decoder with an ESU 21 pin adapter plate (61968) whereas you can add 6 aux functions otherwise, IF YOU LOOK AT THE ESU website you can search for items you would like (Gauge 1 decoders) or look under Märklin digital decoders for Gauge 1.


John

Guys, I believe we are talking Gauge 1 here. John you are onto it.

Hola Vincente,

I checked information about the Marklin 5700, and all ones made before 2002 have an AC motor, and a mechanic or electronic switch to change the direction of the 5700.
If you want to make it digital with sound you have to change indeed the engine to a DC one.

it would most probably the same process as with HO engines by changing the coil magnet (AC) to a perm. magnet (DC) and than adding the choice of decoder to the loco.


John

It would appear to be a good solution. ESU also make a magnet for the motor to convert it to use that decoder. Don't have the catalogue number for the magnet handy, but it has been mentioned in another thread on this forum.

Thanks,

Next days I Will post with conversion pictures.

Best Regards.

Vicente.

Hello friends, again.

I finally finished the installation of the decoder (Loksound XL), I also changed the coils of the motor by others of permanent magnets and installed a speaker.

Here you have a video with the performance test.
Thank you for your contributions.

Test video