05-07-2010, 12:50 PM
It's been a few years since I worked on AC/DC AA5 sets. I use an isolation transformer when I work on them. I have forgotten how to safely connect test equipment such as a signal generator and VTVM to these sets. I have a Heathkit VTVM that has a 3-prong cord. With the radio connected to the isolation transformer, how do I connect the negative test leads to the set?