Hornby O1 with Zimo MX-645

[RedgateModels]

Just fitted sound to my Hornby O1 so I thought I'd share with the community.

 

Pretty straightforward if you get the right speaker. So, remove the two screws from underneath the tender and push the brake stand forward to release the tender top. The speaker I used is from Maplins (as I have a local store in Mansfield) part number N97FU. It is in fact an ABS speaker - ABS-221-RC which are supplied by most the the DCC sound retailers. It only cost £3.59 too!

 

so, solder the purple wires from the decoder to the speaker and pop it into place, it's a snug fit so I didn't bother with black-tak

 

 

The tender weight was a bit too close to the speaker terminals for my liking although the heavy paint finish should have insulated it, I attacked it with a file to be sure

 

 

Replace the weight, then re-attach the decoder socket

 

 

Plug in the decoder and black-tak it to the weight, there's even room for a small (220uF) StayAlive capacitor next to it.

 

 

The sound file is one of Paul Chetter's that he developed for his L1 that was featured recently in Hornby mag - another two cylinder Thompson, so close enough I thought

 

Pop the tender top back on and you're done, short of fiddling with the chuff frequency -  a value of 46 worked well for me and I upped the sound volume to 163, any louder and the sound distorted.

 

Here's a short vid

 

[pauliebanger]

Nice, neat and compact solution.

 

Sometimes the simple ways work out well, and it's always worth trying them first.

 

Great work.

 

Paul