Does anyone have a good schematic for a 60 ma loop supply capable of supplying up to 6 loops? I use the old '72 ARRL Manual one for a single loop, but it current limits thru a dropping resistor. Since I am now acquiring a proper patch panel, I should have a supply that will carry multiple teletypes, both for test and operational purposes. 73 es tnx de Greg WA3IVX