| Brand | Navone Engineering , Inc. |
|---|---|
| MPN | PD-9 |
| Country/Region of Manufacture | United States |
Check the listing for details. PD-9 Phase Detector / Polarity Checker Self-Test Auto-Off Audio Speaker Testing. Condition: New. Listed at 43.00 USD. The PD-9A PHASE DETECTOR is the first system that actually checks itself by reversing every fourth pulse on the software. The PD-9A is only 2.25" x 3.75" x 1" and operates on a 9-volt battery. To maximize battery life, an AUTO-OFF TIMING CIRCUIT shuts the PD-9A off after five minutes.