Ocean Engineering Enterprises - PA-7550 Technical Data Page

Oceanears PA-7550
Technical Specifications and Test Data

PA-7550 Synchronized Swimming Sound System
Audio Isolation Impedance Matching Transformer Specifications:

Input Voltage to Transformer from PA-7550 Electronics:

TEST TONE: 1 KHz
Tape volume control set at MAXIMUM.
Transformer Input Impedance: 8 Ohms
Voltage: 13.6 volts +/- 0.5 volts (transformer NOT connected)
Voltage: 6.6 volts +/- 0.2 volts (transformer connected 8 Ohm tap)
Current = Voltage/Resistance = 6.6/8 = 0.83 amps
Transformer Output Impedance: 4000 Ohms
Voltage: 325 volts +/- 5 volts (DRS-8 speaker NOT connected - NO LOAD)
Current: 325/4000 = 0.08 amps
Voltage: 220 volts +/- 5 volts (DRS-8 speaker connected)
Current: 220/4000 = 0.06 amps

Isolation Transformer Test:
Hi-Pot tested at 2500 volts between transformer input leads and transformer output leads for 5 seconds. Minimum Insulation Resistance (IR) between underwater speaker leads (black wire or white wire) and EARTH GROUND (green wire) is 200 MegOhms. Possible current flow to earth ground is 325 volts / 200,000,000 Ohms = 0.000002 amps (2 microamps).

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