allhifi wrote:
Searching for a used Iso. transformer with precision windings (primary/secondary) as is demanded by a (effective) commercially available Balanced/Symmetrical power supply (i.e. isolation Transformer) may very well prove to be a 'shot-in-the-dark' undertaking.
Part of the expense of , say an Equi=tech product, is that of an ultra premium transformer design/winding precision. I'll bet they if not design their own, test each/every one to meet stringent specifications/QC. This is both time consuming -and expensive.
To think that such a premium transformer can be found in an aging (10-20 year old) design found scouring the Net and Craigs-list is unwise -foolish some would say.
Ken (from Teo Audio), are you referring to 'Torus' when you say 'Topaz' ? Additionally, you mention Eaton Powerware, so I looked up its products -what precisely does Eaton offer for residential audio buffs (or those looking for either a Equi=tech-ish Symmetrical/Bal. unit or a PS Audio-like AC Re-Generator) ?
http://www.eaton.com/Eaton/ProductsServ ... /index.htmAs opposed to searching and buying isolation transformers from Ireland , look to the used (local) market for a premium model from various brands -both new and used.
Most peculiar, however, is the "Buy Used" mantra from a supplier/manufacturer of new products ?
peter jasz
It's not always necessary to buy the newest to get some gain, so why not look at used? New is right there, and I'm not interested in being a market shill, nor do I think that other manufacturers would shun such reasonable talk from another manufacturer. If one wants to buy new, then by all means, look into it.
My mentioned trade off was the trade off of learning and effort being required, no rubber stamp behavior, thank you very much. I mentioned pretty well all the possible avenues, not just one. Even the class d build trick, if one really wants to play around, but that's a game for a really well rounded tech person, not the casual reader. Some of these class D amps can put out a good 2500 watts and that's not something to be trifled with. Pretty well as dangerous as the given light socket.
As for phase matching of the halves of transformers, well, this is done by every manufacturer that I'm aware of. the precision of such is a question but then comes the value or sound qualities of the given levels of precision. What does that mean for the sonics of the given scenario?
Until that is qualified and weighted into the equation, the entire value of matching and how close the average transformer is compared to a premium audio brand may be....well...it's up for grabs. the best that can be done is to make a perfect transformer and then on the same set up, make one that where the phases are off by the expected industry average... and then compare the two in sound quality. Of course, with all things being equal, which they never are, ie, the given test sytem being different and different levels of sensitivity to these aspects and so on.
Then one would know and be the only one who knows..and find a wall of other people's inability to understand one's particular point of understanding.