SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Dynatronics Corp. (Name of Issuer) Common Stock, no par value (Title of Class of Securities) 268157104 (CUSIP Number) May 11, 2011 (Date or 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. 268157104 13G 1. Names of Reporting Persons? John Henderson 2. Check the Appropriate Box if a Member of a Group (see instructions) (a) (b) 3. SEC USE ONLY 4. Citizenship or Place of Organization New York, United States of America Number of Shares Beneficially Owned by Each Reporting Person With: 5. Sole Voting Power: 703,490 shares of Common Stock (1) 6. Shared Voting Power: 0 shares of Common Stock 7. Sole Dispositive Power: 703,490 shares of Common Stock (1) 8. Shared Dispositive Power: 459,673 shares of Common Stock (2) 9. Aggregate Amount Beneficially Owned by Each Reporting Person: 1,163,163 shares of Common Stock 11. Percent of Class Represented by Amount in Row 9 8.65% (3) 12. Type of Reporting Person (see instructions) IN (1) This amount reflects the number of shares held directly by the Reporting Person. (2) This amount reflects shares held by third parties. The Reporting Person has the authority to direct the disposition of such shares. (3) This percentage is calculated based upon 13,457,483 shares of the Issuer?s Common Stock outstanding (as of March 31, 2011), as set forth in the Issuer?s most recent filed Form 10-Q filed with the Securities and Exchange Commission on May 16, 2011. Item 1(a). Name of Issuer: Dynatronics Corp. Item 1(b). Address of Issuer?s Principal Executive Offices: 7030 Park Centre Drive Cottonwood Heights, UT 84121 Item 2(a). Name of Person Filing: John Henderson Item 2(b). Address of Principal Business Office or, if none, Residence: 240 Central Park South Apt. 19E New York, NY 10019 Item 2(c). Citizenship: New York, United States of America Item 2(d). Title of Class of Securities: Common Stock Item 2(e). CUSIP Number: 268157104 Item 3. Not applicable. Item 4. Ownership. The following information with respect to the ownership of the Common Stock by the Reporting Person filing this Schedule 13G is provided as of June 20, 2011: Shares Held Directly (1): 703,490 Sole Voting Power (1): 703,490 Shared Voting Power: 0 Sole Dispositive Power (1): 703,490 Shared Dispositive Power (2): 459,673 Beneficial Ownership: 1,269,259 Percentage of Class (1): 8.65% (1) This amount reflects the number of shares held directly by the Reporting Person. (2) This amount reflects shares held by third parties. The Reporting Person has the authority to direct the disposition of such shares. (3) This percentage is calculated based upon 13,457,483 shares of the Issuer's Common Stock outstanding (as of March 31, 2011), as set forth in the Issuer's most recent filed Form 10-Q filed with the Securities and Exchange Commission on May 16, 2011. Item 5. Ownership of 5 Percent or Less of a Class If this statement is being filed to report the fact that as of the date hereof the Reporting Person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following: o Item 6. Ownership of More than 5 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 a Group Not applicable. Item 10. Certification Not applicable. SIGNATURES 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. Date: June 20, 2011 /s/John Henderson