Exhibit 31.1

                  CERTIFICATION PURSUANT TO SECTION 302 OF THE
                          SARBANES-OXLEY ACT OF 2002

I, Kenneth A. Chymiak, certify that:

1.  I have reviewed this annual report on Form 10-K/A of ADDvantage
Technologies Group, Inc, (the "Company");

2.  Based on my knowledge, this report does not contain any untrue statement of
a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were
made, not misleading with respect to the period covered by this report;

3.  Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the Company as of,
and for, the periods presented in this report;

4. I am responsible for establishing and maintaining disclosure controls and
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15-(e)) for the
Company and have:

  a.  Designed such disclosure controls and procedures, or caused such
      disclosure controls and procedures to be designed under my supervision,
      to ensure that material information relating to the Company, including
      its consolidated subsidiaries, is made known to me by others within those
      entities, particularly during the period in which this report is being
      prepared;

  b.  Evaluated the effectiveness of the Company's disclosure controls and
      procedures and presented in this report my conclusions about the
      effectiveness of the disclosure controls and procedures, as of the end
      of the period covered by this report based on such evaluation; and

  c.  Disclosed in this report any change in the Company's internal control
      over financial reporting that occurred during the Company's most recent
      fiscal quarter (the Company's fourth fiscal quarter in the case of an
      annual report) that has materially affected, or is reasonably likely to
      materially affect, the Company's internal control over financial
      reporting; and

5.  I have disclosed, based on my most recent evaluation of internal control
over financial reporting, to the Company's auditors and the audit committee of
the Company's board of directors (or persons performing the equivalent
functions):

  a.  All significant deficiencies and material weaknesses in the design or
      operation of internal control over financial reporting which are
      reasonably likely to adversely affect the Company's ability to record,
      process, summarize and report financial information; and

  b.  Any fraud, whether or not material, that involves management or other
      employees who have a significant role in the Company's internal control
      over financial reporting.



Date: February 11, 2005


                                          By: /s/ Kenneth A. Chymiak
                                          --------------------------
                                          Kenneth A. Chymiak
                                          Chief Executive Officer and Chief
                                          Financial Officer