To 'joeqsmith'. Is that "Joe Smith" from 'YouTube', re: multimeter testing etc etc ?? (Been chatting lately).
YES, it was quite a large meter, which I 'THINK' was made by the original "AVO" meter company, but I may be wrong.
This was at least 45 years ago now! It was about 400 x 400 x 300 mm's, and had a relatively 'low' "Ohms/Volt" as
the coil construction itself was quite large. (None of this uA stuff!!!). I'm 'digressing' here, but THEN, most circuits
required a minimum load, (old technology), to produce accurate voltage measurement results, where as TODAY, the
OPPOSITE occurs, and the meter itself would be grossly affecting the results ! (I think you understand what I mean).
If it is YOU Joe, then as per prev conversations, your expertise is in low power & some RF applications. My INITIAL
training was with very high power/current distribution networks, and I ONLY mention this so as to explain the following....
In Australia, we use different voltages than the U.S.A. for power transmission. We often start at 275-kv, and then reduce
to many others, before locally at a suburban level it is usually 11kv Delta. After that, it is transformed to 415v 3-phase,
and when a "Delta to Star" transformer is used, the 'Star-point' is 240v to each 'Phase', (unlike your 110v/120v).
Now... when a TOTALLY UNLOADED open circuit 11kv transformer is measured, we may find thousands of volts on the
Neutral, (the star point), and a mis-match of thousands of volts on the other HV legs.... all due to NON Loading !!!
These days, in a simplified comparison, the 'outputs' from a Switch-Mode Power-Supply also need a specific/minimal
LOAD, in order to work!!... Damn it.... All I'm trying to say is that SOMETIMES a 'real' load is important !! :-) :-)