-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000939802-09-000107.txt : 20090714
<SEC-HEADER>0000939802-09-000107.hdr.sgml : 20090714
<ACCEPTANCE-DATETIME>20090714140346
ACCESSION NUMBER:		0000939802-09-000107
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090709
FILED AS OF DATE:		20090714
DATE AS OF CHANGE:		20090714

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ULLMAN HOWARD
		CENTRAL INDEX KEY:			0001277373

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-28831
		FILM NUMBER:		09943596

	MAIL ADDRESS:	
		STREET 1:		12535 ORANGE DR
		STREET 2:		STE 613
		CITY:			DAVIE
		STATE:			FL
		ZIP:			38330

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CHDT CORP
		CENTRAL INDEX KEY:			0000814926
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC LIGHTING & WIRING EQUIPMENT [3640]
		IRS NUMBER:				841047159
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			0709

	BUSINESS ADDRESS:	
		STREET 1:		350 JIM MORAN BLVD.
		STREET 2:		SUITE 120
		CITY:			DEERFIELD BEACH
		STATE:			FL
		ZIP:			33442
		BUSINESS PHONE:		(954) 252-3440

	MAIL ADDRESS:	
		STREET 1:		350 JIM MORAN BLVD.
		STREET 2:		SUITE 120
		CITY:			DEERFIELD BEACH
		STATE:			FL
		ZIP:			33442

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CHINA DIRECT TRADING CORP
		DATE OF NAME CHANGE:	20040601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CBQ INC
		DATE OF NAME CHANGE:	19981207

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FREEDOM FUNDING INC
		DATE OF NAME CHANGE:	19961205
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-07-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000814926</issuerCik>
        <issuerName>CHDT CORP</issuerName>
        <issuerTradingSymbol>CHDO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001277373</rptOwnerCik>
            <rptOwnerName>ULLMAN HOWARD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>350 JIM MORAN BLVD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DEERFIELD BEACH</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33442</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Series B Convertible Preferred Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-07-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>1</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>914813</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Series B-1 Convertible Preferred Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-07-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>1</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>135000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>135000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Equity Swap Series B for Series B-1</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Howard Ullman</signatureName>
        <signatureDate>2009-07-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----