The Miles Technology ACT-1 Audio/Cable Tester provides an immediate and complete indication of the wiring status of any audio cable. In addition, with a simple flip of a switch, the unit provides a 500 Hz test tone at either microphone or line level. This is for checking any signal path through an audio system.
New, never opened. From manufacturer:The PV350 pressure/vacuum transducer module (the module) measures gauge pressure; the difference between atmospheric (barometric) pressure and the pressure (or vacuum) applied to the pressure port on the transducer. It
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