Transformer problem

I saw a "transformer" listed on amazon, 240V in 12V @ 4.9A out, - for lighting £3.94

It  arrives, I connect it up to a controller, locos travel in spurts and the "transformer" clicks in time with the spurts. Suspect I have some electronic convertor not a conventional inductive type. Any suggestions, ideas (apart from bin it?

Can you return it and say it doesn't work?.

Mike

I'm no expert, but assuming 4.9A is 4.9Amp at 12 volts, sounds a bit high to me.

Most Model railway transformers appear to accept a load of about 1Amp and 16/0.2 wiring is only rated at 3Amps.

Could be 'not fit for purpose', but there again I might be totally wrong.


Ed

It may be capable of delivering up to 4.9 Amps, but the overload circuit on my controler operates  at less than 1 amp so that should not be a problem. The reason I went for it was low price and the fact that it is completely enclosed; most transformers are comparatively large and not enclosed.

I have now gutted a wall wart of it's rectifier and taking a switchable direct AC output from it, I want it to power my running in oval; one advantage I've already found is that I can switch the output voltage down, which is very handy for some of the Dapol and Union Mills jack rabbits.

I have used one of these 12v 5amp supplies - nice smooth output
http://www.ebay.com.au/itm/AC100-240V-DC12V-5A-Laptop-5050-LED-light-charger-Supply-Adapter-Power-Cord-AU-/170846394810?pt=AU_Laptop_Accessories&hash=item27c73d19ba

I specifically wanted an AC output,not DC, the controller I'm using has its own rectifier and stabiliser. 

Normally if DC is fed in, the inbuilt rectifier sorts it out if it is a full wave bridge rectifier otherwise reverse the input power leads.

I bought one of those transformers Sol in the hope that it would power up my point motors & MASTERswitches. Unfortunately it seems to have a safety cut-out if the initial load is in excess of about 2 amps so it has now been set aside for use elsewhere and I've bought a DCC Concepts PSU2+. Not cheap but a beautiful bit of kit.