On Sun, 3 Jan 1999 08:15:25 EST Darren Logan writes: >Be very careful with your transformer !!!. >But this is an example only and may not be pin compatible to your >transformer. >YOU NEED THE DATA SHEET as a wrong connection could result in a lot of >smoke >and maybe physical damage to yourself so BE CAREFUL. If you connect the windings improperly so they are opposing rather than aiding, usually all that happens is the input fuse will blow (you do have a fuse, right?) If you want to be certain, it's not hard to test. If your local line is 120V, connect it to one of the primaries, and connect one side of the line to one end of the other primary. In other words, they are almost connected in parallel. Energize the transformer and measure the AC voltage between the other line and the open end of the other secondary. If the phase is right, it will be nearly zero and it is safe to connect those two points, completing the parallel connection. If you read double the line voltage, the second primary needs to be connected the other way. If your line is 240V, it's not possible to just connect one primary. Use another transformer with an output of 120V or less to energize one primary and connect one side of the other primary to it as for the test above. But in this case you want to measure twice the input voltage between the two points, then it is safe to connect the line to those points and leave the jumper in place to complete the series connection. These tests are best done without anything connected to the secondaries. And be careful measuring the line voltages. ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]