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Install Guides by Loco Class General - Fitting Decoders General - Fitting Kit CT Elektronic Reference

YouChoos Installation Guides

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Heljan O Gauge Class 35 Hymek

Example 1 - Heljan O Gauge Class 35 Hymek with Zimo Sound - MX696

Kit: MX696KS; 2x Zimo Dumbo 50X15X14-2W speakers

We love hydraulics, and this big Heljan 7mm model is a beaut!

The usual approach is taken to fitting sound - remove the factory PCB to make space for the MX696KS large-scale decoder and screw-terminal adapter board. All wiring remains the same, except we have to add resistors to protect the lighting, as the removed PCB had the original resistors.

We remove all of the plugs and sockets too, as the wires will simply be screwed direct to the decoder's screw terminals.

A pair of dual Dumbo speakers are connected in series. The dual speakers in themselves are 2W at 4 ohm, so connecting in series gives 4W at 8 ohm.

Some work to do on the lighting, adding resistors, and ensuring they get connected up to the right terminals on the decoder!

Example 2 - MX699KS with YLR603010

Kit: MX699KS; YLR603010

Perhaps a slightly easier install - the MX699KS is a bigger shape to fit in the centre of the Hymek (at least the newer version), and a YLR603010 speaker simply slots underneath the decoder (not in the fuel tank).

Just checking the sizes and positions for the speaker and decoder here...

YLR60301 speaker goes face down under the decoder platform

MX699KS measured up in place, then wired in

Disclaimer

Please note that these guides are provided as useful resources for you, as-is. YouChoos cannot be held responsible for errors in the information, or for any damage caused to your models or equipment if you choose to follow any of the steps detailed here.


A bit of YouChoos poster art for your enjoyment!