Hello,
Im being a skinflint and don't really want to fork out 120 quid for a mains transformer. I have a 500VA toroidal in mind, with twin primaries and twin secondaries. primaries are 2x 0-115v and secondaries are 2x 0-30v
If the mains is fed in across the secondaries, then this should result in a 440-0-440 output, on what used to be the primaries. Is the insulation likely to be up to this? Or any other factors I haven't considered, like the power handling of the primary. It would be running the HT supply of the WAD Kat6550 circuit, which is a push-pull 6550 power amp.
World Audio Design
The secondaries are rated at 8.5amps, so I guess the primary should match this power handling (8.5x30 = 255W??). If the primary wasn't up the the current loading, which I can't imagine too easily, I guess it would be possible to parallel two toroids. The think is these toroidal transformers are only £30, so it's very tempting!!
Thanks,
Steve
Im being a skinflint and don't really want to fork out 120 quid for a mains transformer. I have a 500VA toroidal in mind, with twin primaries and twin secondaries. primaries are 2x 0-115v and secondaries are 2x 0-30v
If the mains is fed in across the secondaries, then this should result in a 440-0-440 output, on what used to be the primaries. Is the insulation likely to be up to this? Or any other factors I haven't considered, like the power handling of the primary. It would be running the HT supply of the WAD Kat6550 circuit, which is a push-pull 6550 power amp.
World Audio Design
The secondaries are rated at 8.5amps, so I guess the primary should match this power handling (8.5x30 = 255W??). If the primary wasn't up the the current loading, which I can't imagine too easily, I guess it would be possible to parallel two toroids. The think is these toroidal transformers are only £30, so it's very tempting!!
Thanks,
Steve
If a winding, whether primary or secondary has higher than its rated voltage applied, there'll be trouble. So your original idea is no-go.
However, there is nothing wrong with using a transformer to step-up, just as speaker described.
There is no way though, that you'll get the voltages you want, without a proper transformer.
You don't have to pay the money you are thinking. They sometimes crop up on eBay second hand.
I'm closing this thread before any really dangerous suggestions are made
However, there is nothing wrong with using a transformer to step-up, just as speaker described.
There is no way though, that you'll get the voltages you want, without a proper transformer.
You don't have to pay the money you are thinking. They sometimes crop up on eBay second hand.
I'm closing this thread before any really dangerous suggestions are made - Status
- Not open for further replies.