using a 50hz transformer on 60hz mains

[Seeker]

I want to build a power supply similar to the G Pultec but with the second transformer (the  12v -220v) being a  50hz transformer... & I am on 60hz, US mains.  My understanding is that this should be fine, dose anyone see any issues with this? 

Thanks!

 

[JohnRoberts]

A 50Hz transformer will generally have more copper and more iron than the same power 60Hz rock. (60/50 more). 

The obvious question is the primary voltage correct?

JR

 

[Seeker]

Thanks John, this is what I was intending... with the second transformer being 50hz

 

[JohnRoberts]

That should work fine...

You could even connect a second 110-12V transformer to the first with the secondaries connected in parallel like your picture but the primaries wired in series to form an auto-former where the second 110 primary gets added to the mains voltage across the first.

I once stacked up 4 low voltage transformers that way to make near 480V for some bench tests. 

JR

 

[Seeker]

Thanks again John, I've used this kind of configuration before, but never had any 50hz transformers around.... 

I'll have to remember that auto former trick when I get back to playing with my tesla coil.