I have a large number of small line to voice transformers that came
out of a very large municipal facility These are all from different
manufacturers. Some are tapped to watts and some are different. I
would like to re employ these on a current project which will require
70V units , but I do not know whether they are 25V or 70V
transformers. Can anyone suggest an easy way to determine this? I have
tried comparing them with known transformers, however resistance
readings are too variable to determine anything concrete. Thanks, Lenny