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Romy,

Thanks for your thoughts.

Very interesting your idea to take 110v from half the secondary straight off the pole... I am trying to confirm with the electric company that this might be possible... Otherwise I've got some climbing gear and a volt meter...

Thinking in another direction : 

Is there a rapport between the step-down factor (turns ratio) and the passage of garbage via induction? For example, does a large turns ratio filter out more or less of the nasties?

I know transformers can alter the way our equipment produces sound, but we do accept big crude step-down transformers outside the house all the time... Step-down transformers at the substation are shared by an entire town, and the transformer up on that pole outside your house is shared by several neighbors.

I wonder how far we could get from the nastiness of the grid by simply using a private multi-stage chain of (like 5) large de-coupling transformers followed by good filtration and possibly an AC oscillator...???

Back to Eurovolts :

As mentioned in my previous post, we Euro audio users (slight cringe there!) are dealing with a lower oscillating frequency (50Hz) than in the US… What I did not mention is that due to the higher 230v, we also accept more peak-to-peak amplitude. About twice the amplitude in fact. Combine this with the 16.5% slower cycling, and we are giving our equipment a bumpier ride.

Is this a good enough reason to supply audio equipment with 110v/60Hz? I don't know, but (all other parameters being equal) I have yet to be solicited for the sprinkling of a visitor's ashes on this floor (I did once make such a promise to a musician visitor back in the US).
 
Regarding my planned experiment mentioned in the above post (supplying the P1200 with a balanced 220v mains supply, by using a pair of hefty step-down 220v to 110v input transformers) : I need to think more about this, and about the relative phase of each of the two sines as delivered by the pair of input transformers.

Regarding PaulMC :

Where the Euro-spec P300 had a special output transformer, I suspect the Euro-spec P1200 used a special input transformer to step down the input voltage to 110v. This is confirmed by the fact that on the 220v settnig, my US model P1200 will not accept European 220v if it is all coming in on one leg (immediately causes the circuit breaker to trip). It will however accept 220v if supplied as is the case in the US, where it is divided between the two legs (see previous post for my interpretation of the 220v switch on the P1200).


jd*

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