I read your post again and tell me if I’m barking up the wrong tree, if your using a Stellarmate as a power supply to your mount ( 230v AC to 12V DC , max load 10amps ) why are you talking about using your old garden light transformer ( 230v AC to 12v DC ) to power your mount ??
Mains 230V AC > 12V Power supply > Mount
I’m a bit lost !
|