Hello,
I was given very nice and massive power transformer which came from my friend Pioneer multi-channel receiver. It has single primary and dual secondary windings. I asked my friend to make a picture how it is wired before removing it. The pictures show secondary windings to be connected in parallel. At first I thought things are easy: two secondary windings (red and white) plus black wire which I thought is ....connected to screen. I have measured resistance among windings which are:
My question is not about H-Class, but about possibility of using this transformer for non-H-Class power supplies. Can I use it and how connection of secondary windings should be made?
Thank you very much for the help.
I was given very nice and massive power transformer which came from my friend Pioneer multi-channel receiver. It has single primary and dual secondary windings. I asked my friend to make a picture how it is wired before removing it. The pictures show secondary windings to be connected in parallel. At first I thought things are easy: two secondary windings (red and white) plus black wire which I thought is ....connected to screen. I have measured resistance among windings which are:
- Primary (blue/brown): 0.7 Ohm
- Secondary (red/red and white/white): 0.5 Ohm
My question is not about H-Class, but about possibility of using this transformer for non-H-Class power supplies. Can I use it and how connection of secondary windings should be made?
Thank you very much for the help.
Do you have a variac? Or other line transformer handy (say, with a 12V secondary)? You may want to power it up to a fraction of the line input voltage - and measure across the windings you're interested in using.
Hello jjasniew,
No, I do not have variac. My testing tools are limited. I did try to search the net by information printed on the transformer, but with no avail. I am not sure TAM means....... Tamura? The transformer itself is large in size, but I am not sure wjat VA could be. My friend mentioned the receiver could deliver 700W as per specification. It was 7.1 channel one.
No, I do not have variac. My testing tools are limited. I did try to search the net by information printed on the transformer, but with no avail. I am not sure TAM means....... Tamura? The transformer itself is large in size, but I am not sure wjat VA could be. My friend mentioned the receiver could deliver 700W as per specification. It was 7.1 channel one.
Maybe I should ask different question: what is the difference between H-Class power transformer and any other design for non-H Class one?
Class H power transformer has multiple voltage taps. You don’t HAVE to use the low voltage taps.
The class H circuit has less average power draw, and it will usually be sized with that in mind. Putting the “equivalent” class AB load on it will make it run hotter than in normally would.
The class H circuit has less average power draw, and it will usually be sized with that in mind. Putting the “equivalent” class AB load on it will make it run hotter than in normally would.