UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13G/A

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 10)*

                              Key Technology, Inc.
                                (Name of Issuer)

                          Common Stock, $0.01 par value
                         (Title of Class of Securities)

                                   493143 10 1
                                 (CUSIP Number)

                                December 31, 2003
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

         / /      Rule 13d-1(b)

         / /      Rule 13d-1(c)

         /X/      Rule 13d-1(d)


* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).







CUSIP No. 493143 10 1

Item 1:           Name of reporting person:

                  Thomas C. Madsen

Item 2:           Check the appropriate box if a member of a group:

                  (a) [ ]
                  (b) [ ]

Item 3:           SEC use only:

Item 4:           Citizenship or place of organization:

                  United States of America

Number of shares beneficially owned by each reporting person with:

Item 5:           Sole voting power:

                  530,529

Item 6:           Shared voting power:

                  0

Item 7:           Sole dispositive power:

                  530,529

Item 8:           Shared dispositive power:

                  0

Item 9:           Aggregate amount beneficially owned by each reporting person:

                  530,529

Item 10:          Check if the aggregate amount in row (9) excludes certain
                  shares:

                  N/A

Item 11:          Percent of class represented by amount in row 9:

                  10.5%



Item 12:          Type of reporting person:

                  IN

Item 1(a)         Name of Issuer:

                  Key Technology, Inc.

Item 1(b)         Address of Issuer's Principal Executive Offices:

                  150 Avery Street
                  Walla Walla, WA 99362

Item 2(a)         Name of Person Filing:

                  Thomas C. Madsen

Item 2(b)         Address of Principal Business Office, or, if none, Residence:

                  150 Avery Street
                  Walla Walla, WA 99362

Item 2(c)         Citizenship:

                  United States of America

Item 2(d)         Title of Class of Securities:

                  Common Stock

Item 2(e)         CUSIP Number:

                  493143 10 1

Item 3            If this statement is filed pursuant to Sections 240.13d-1(b)
                  or 240.13d-2(b) or (c), check whether the person filing is a:

                  Not applicable



Item 4            Ownership.

                  The following information is as of December 31, 2003:

                  (a) Amount Beneficially Owned:

                           530,529 shares

                  (b) Percent of Class:

                           The shares represent 10.5 percent of the class

                  (c) Number of shares as to which such person has:

                           (i)   Sole power to vote or to direct
                                  the vote: 530,529

                           (ii)  Shared power to vote or to direct the vote: 0

                           (iii) Sole power to dispose or to direct the
                                  disposition of: 530,529

                           (iv)  Shared power to dispose or to direct the
                                  disposition of: 0

Item 5            Ownership of Five Percent or Less of a Class:

                  Not applicable

Item 6            Ownership of More Than Five Percent on Behalf of
                  Another Person:

                  Not applicable

Item 7            Identification and Classification of the Subsidiary which
                  Acquired the Security Being Reported on by the Parent Holding
                  Company or Control Person:

                  Not applicable

Item 8            Identification and Classification of Members of the Group:

                  Not applicable

Item 9            Notice of Dissolution of Group:

                  Not applicable

Item 10           Certifications:

                  Not applicable




                                    SIGNATURE

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information set forth in this statement is true, complete,  and
correct.


                                                     February 10, 2004



                                                     /s/ Thomas C. Madsen
                                                     ---------------------------
                                                     Thomas C. Madsen


ATTENTION:  Intentional  misstatements  or omissions of fact constitute  federal
criminal violations (See 18 USC 1001)