That’s going well until I find something slightly out of the ordinary that my very basic knowledge cannot cope with - and I have such a situation this morning.
I’ve opened up a Bachmann 5MT that I had fitted with an 8 pin TTS decoder via an 8/21 pin adapter - but I see that the 21 pin socket already has a small electrolytic (I think) capacitor fitted. It seems to make no difference to the running qualities.
To be honest, the existing capacitor and the adapter make space very tight in this one so it probably won’t be a candidate for a ‘homebrew’ but if I remove the adapter and fit a 21 pin TXS there will be plenty of room for the PowerBank and speaker.
But that presents me with a question - when fitting the PowerBank (which plugs into the TXS decoder), do I remove the pre-fitted capacitor or leave it in place?
![Image](https://i.postimg.cc/QH3pVVpL/image.jpg)