Yes
Mel
Modeling the early to mid 1950s SP in HO scale since 1951

My Model Railroad
http://melvineperry.blogspot.com/
Bakersfield, California
Aging is not for wimps.
Yes
Mel
Modeling the early to mid 1950s SP in HO scale since 1951

My Model Railroad
http://melvineperry.blogspot.com/
Bakersfield, California
Aging is not for wimps.
VA is Volt Amps, it is simply volts x amps or in this case 18 volts x 3.6 amps = 65VA.
I would assume that the maximum total current available from the MRC AH800 would be 3.6 amps. That would mean both the 12volt and 18volt added together can’t total more than 3.6 amps.
Mel
Modeling the early to mid 1950s SP in HO scale since 1951

My Model Railroad
http://melvineperry.blogspot.com/
Bakersfield, California
Aging is not for wimps.
Try this on for size. Switched red 18v wire to 12v side. Lights all came on at less brightness as expected. I then moved it back to 18v side. NO OVERLOAD and all building lights came on. I have let it run for a while with no overload light coming on.
There CAN be a common “ground” because there is no DC side.
MRC_AH800 by Edmund, on Flickr
No throttles on this baby:
MRC_AH800b by Edmund, on Flickr
This thing is nothing more than a glorified wall wart.
Most of the MRC products I’ve opened up over the years had some pretty messy wiring and the cheapest components possible. Sometimes “ratings” can be a little “overblown” too.
Good Luck, Ed
You fixed it! [8-|][8-|][8-|]
Mel
Modeling the early to mid 1950s SP in HO scale since 1951

My Model Railroad
http://melvineperry.blogspot.com/
Bakersfield, California
Aging is not for wimps.