Only a problem if both ends of the bolt shorts to the case and creates a shorted turn.The only real issue with toroidal transformers comes when the case shorts on the central mounting bolt! Acrylic cases obviously prevent any such problems.
1. No ad-hominem
2. No spamming or shilling
Generally it won't stay shorted for long, usually long enough to melt the case and start a fire.Lurcher300b wrote:Only a problem if both ends of the bolt shorts to the case and creates a shorted turn.The only real issue with toroidal transformers comes when the case shorts on the central mounting bolt! Acrylic cases obviously prevent any such problems.
Now it is many years since I learned magnetic theory and mag amps so I can't vouch for the accuracy of the content of the above though magnetic saturation of the core rings bells, I'll remember why sooner or later. Google finds a huge number of entries, something like 24,000, so there is plenty to keep you awake on a cold night!
I certainly understand that Toroids offer lower impedance, and this must be good (and possibly paramount), whereas EI transformers offer better dc offset 'performance' and possibly a lower bandwidth (with potential noise blocking benefits). Interesting that the Audial people found that the EI transformers 'sounded' better than Toroids.
I remember discussing dc offset issues with Nick (Lurcher) a couple of years ago (I incorporated one of his dc blockers within a Ben Duncan isolation transformer, toroid based, that I use) - he suggested (I seem to remember) that an R Core transformer with a split bobbin might make a good basis for a Balanced Power Supply where high dc offset was present on the mains supply.
Any thoughts or experience anyone?
Is it worth doing ? Alot of space can be saved by having a transformer wound with two secondaries.
It is a shame that most of my transformers have two windings. I will just have to make do with what i have
Coming from a mostly Naim background (sorry) i never thought it would do any harm - they seem to have a thing for using a large transformer with multiple windings.
I have done quite a bit of experimenting with transformer placement and found sonic benefits from moving things further apart even when there was no hum to begin with. I came to the conclusion that at least 20cm was needed between transformers and regulators, amplifiers, dacs, anologue stages and even between two transformers.
I was more or less laughed at or told i was hearing things by the objectivists at PFM, one of the reasons i found hfs and started posting here. The other time i got laughed at was when i removed the magnet which holds the cd draw in inside my naim cd player. I reported an improvement and was told it could not possibly make any difference.
Well, from that moment on i decided not to believe what any one said until i had tried it and heard with my own ears. I guess i was a subjectivist all along and just did not realise it.
Coming out feels so good. It is expensive though buying and tryingall these things.
All the best Doc.