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<FILING-DATE>20060418
<DATE-OF-FILING-DATE-CHANGE>20060418
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>ADVANCED POWER TECHNOLOGY INC
<CIK>0001114973
<ASSIGNED-SIC>3674
<IRS-NUMBER>930875072
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<BUSINESS-ADDRESS>
<STREET1>405 SW COLUMBIA STREET
<CITY>BEND
<STATE>OR
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<PHONE>5413828028
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<CONFORMED-NAME>SCHATZ DOUGLAS S
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<ACT>34
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<DOCUMENT>
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<SEQUENCE>1
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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                    <value>See Footnote</value>
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                <transactionPricePerShare>
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            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
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        <nonDerivativeTransaction>
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                <transactionPricePerShare>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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            </underlyingSecurity>
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        <derivativeHolding>
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            <expirationDate>
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            <underlyingSecurity>
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            <postTransactionAmounts>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        <derivativeHolding>
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                <value>Option right to buy (#779)</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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                <underlyingSecurityShares>
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            <postTransactionAmounts>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Option right to buy (#1593)</value>
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            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2003-08-01</value>
                <footnoteId id="F1"/>
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            <expirationDate>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Option right to buy (#1730)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.95</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2004-08-01</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2013-08-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
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                <underlyingSecurityShares>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Option right to buy (#1847)</value>
            </securityTitle>
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                <value>10.18</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-08-03</value>
                <footnoteId id="F1"/>
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            <expirationDate>
                <value>2014-08-03</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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                </underlyingSecurityShares>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Option right to buy (#1984)</value>
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            <exerciseDate>
                <value>2006-08-01</value>
                <footnoteId id="F1"/>
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            <expirationDate>
                <value>2015-08-01</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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                    <value>D</value>
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        </derivativeHolding>
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    <footnotes>
        <footnote id="F1">Vests in two equal annual installments beginning with date indicated.</footnote>
        <footnote id="F2">Shares owned by Advanced Energy Industries, Inc. (AEI). Douglas Schatz is Chairman of the Board for AEI.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/S/ DOUGLAS SCHATZ</signatureName>
        <signatureDate>2006-04-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
