>>> DUAL REGULATOR ASSEMBLY <<<

The voltage regulator assembly shown in figures 1 and 2 can be powered from  a 28 or 36 volt  center taped secondary winding of a power transformer with a 117 volt, 60 Hz primary winding, or  for portable equipment applications, standard alkaline batteries.  Three 9 volt or five 6 volt batteries connected in series are suggested (27 or 30 volts).  The circuit diagram of figures 3 and 4 show AC and DC sources driving the regulator.  For battery operation, diodes, D1 4 provide reverse battery polarity protection.  The board size is 4.0 X  2.2 (inches).

Figure 1, Dual Regulator Assembly, Side 1

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Figure 2, Dual Regulator Assembly, Side 2

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Figure 3, AC Power Line Operation

To power the DRA12, use transformer P/N F122X or 166G28, and to power the DRA15 and DRA18, use transformer P/N P-8612.

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Figure 4, Battery Operation

Three 9 volt or five 6 volt batteries connected in series (27 or 30 volts) will power the DRA12 and DRA15.

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DRA PC Board Wiring Diagram

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Plus & Minus 12 volt Regulator Assembly DRA12

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Plus & Minus 15 volt Regulator Assembly DRA15

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Plus & Minus 18 volt Regulator Assembly DRA18

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