The idea of the dual meter unit was to be able to quickly go thru a circuit without having to touch the meter to change ranges or change to AC or DC. If you stuck it on a DC circuit it would read that right. If you stuck it on an AC circuit it would read that. Also you could read an AC voltage riding on top of a DC voltage. One meter would display the DC and the other the AC value. Kind of handy sometimes. I may have a catalog sheet of it somewhere around here but I haven't run across it in some time,
Yes the mod box was ok but didn't sell to well. The other item I assume that you meant "lineman". That was a very slick box and sold well. It was a line level meter with tone generator and audio amp/speaker and mike. It had the commonly used tone remote tones built in so you could check the line level at those frequencies. Usually people bought two of them, one to use on each end of a line being tested. You could talk back and forth to the guy on the other end and send each other tones and measure levels each way. 73 Gary K4FMX > There were very few combination analog/DVM's at service instrument > prices and the DMM's that had bar graphs didn't have the resoloution for > trends at the time. I can only think of a few off hand such as the > Keithly,Simpson had an early one in a 260 type case with > Nixies,Ballentine $$$$$, and Fluke $$$$. I think Heath had one for a > short time too. I'd love to see a picture of this meter. I'm still > trying to grasp what was so special about two separate meters for AC and > DC. There had to be some of Bill's magic either comparator presets, > audible alarm or some neat thing that would make service easier. > > While the subject is odd Helper stuff, remember the Mod Box or the > Sineman? >
