Thanks for info. Where do I find a transformer like that?
"the secondary of the transformer is connected in series with mains but in antiphase"
Could you pls explain more about this? antiphase?
If the mains fluctuates, you can't do much about it without inline conditioners.Would you consider "undervoltage" a problem for the v76, v72? If the voltage goes under 220v.
I recall concerns when 240V and 220V mains voltages were first harmonized to 230V... in some previously 240V regions that 230V was more like 235V.
UK mains was harmonised to 230V some years ago. Last time I looked - and at one time I was looking quite a lot - it still came 'out of the wall' at typically 242V.
+10% / -6% spec obv permits up to 264V so nothing really had to change from a regulatory point of view.
Of course this proper '50Hz' mains which we all know sounds better than that '60Hz' nonsense. Gives smoother more coherent upper mids