Found this today in thrift store, seemed like a reasonable deal, so I bought it. It came with the operator's manual, registration card and original box. I am guessing this is a mid-1980s product. The manual mentions connecting it to 250, 255, 260XL, 261, 270, 260 series 8 or 270 series 5 testers. I have an inoperative 260P somewhere, so maybe this is a good time to resurrect it.
Meanwhile, the thought crossed my mind, that this might be an interesting probe to connect to a DSO, such that it might allow me to visually see motor start-up current spike, followed by normal run current. the manual says that it should be connected to a device with a 2.5 volt AC, or 3 volt AC scale, and that the device should have a sensitivity of 5000 ohm per volt AC. A DSO has a considerably higher input impedance than that (1M or 10M). To present the proper load to the clamp, should I put a resistor across the input connection ? If so, it sounds like 12.5K or 15K resistor.
Will this even work ?