Hi
I picked up a transformer today that says "6-0-6" on it. When I power it up, it puts out 12V p-p, 8.6V RMS (centre tap to one secondary - double the above across both secondaries, of course). Actually, first question - is the "6-0-6" referring to p-p or RMS voltage? If the former, then it's out by 100%, if the latter, then still out by 43%. It's only rated for 250mA, and the voltage didn't drop at all at 100mA or so.
What's a reasonable expectation for accuracy with these things?
Cheers
john