SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 -------------- SCHEDULE 13D (RULE 13D-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13D-1(A) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13D-2(A) Amendment # 1 Technical Communications Corp. -------------- (Name of Issuer) Common Stock, par value $.10 per share (Title of Class of Securities) 878409101 --------- (CUSIP Number) Paul D. Sonkin Hummingbird Management, LLC 460 Park Avenue, 12th Floor New York, New York 10022 212 750-7117 ------------------------ (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) September 15, 2006 ----------------- (Date of Event Which Requires Filing of This Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box /_/. Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7(b) for other parties to whom copies are to be sent. -------- 1 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 disclosures provided in a prior cover page. The information required on 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 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. 878409101 13D Page 2 of 14 Pages ------------------------ ---------------------------- ================================================================================ 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Hummingbird Management, LLC IRS No. 13-4082842 -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /x/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 149,943 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 149,943 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 149,943 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 10.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* OO ================================================================================ ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 3 of 14 Pages ------------------------ ---------------------------- ================================================================================ 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Paul D. Sonkin -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /x/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 149,943 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 149,943 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 149,943 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 10.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON OO ================================================================================ . ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 4 of 14 Pages ------------------------ ---------------------------- ================================================================================ 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Hummingbird Capital, LLC (f/k/a Morningside Capital, LLC) -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /x/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS OO -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 149,943 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 149,943 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 149,943 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 10.9% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON OO ================================================================================ ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 5 of 14 Pages ------------------------ ---------------------------- ================================================================================ 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Hummingbird Value Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /X/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 20,183 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 20,183 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 20,183 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.5% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON LP ================================================================================ ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 6 of 14 Pages ------------------------ ---------------------------- ================================================================================ 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Hummingbird Microcap Value Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /X/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 14,083 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 14,083 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 14,083 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON LP ================================================================================ ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 7 of 14 Pages ------------------------ ---------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Hummingbird Concentrated Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /X/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 334 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 334 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 334 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON LP ================================================================================ ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 8 of 14 Pages ------------------------ ---------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Tarsier Nanocap Value Fund, L.P. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / / (b) /X/ -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) / / -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 115,343 OWNED BY EACH REPORTING PERSON WITH ----------------------------------------------------------------- 8 SHARED VOTING POWER -0- ----------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 115,343 ----------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 115,343 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES / / -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8.4% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON LP ================================================================================ ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 9 of 14 Pages ------------------------ ---------------------------- AMENDMENT NO. 1 TO SCHEDULE 13D This Amendment No. 1, dated September 19, 2006, to Schedule 13D is filed by the Reporting Persons and amends Schedule 13D as previously filed by the Reporting Persons with the Securities and Exchange Commission on May 2, 2006 (the "Schedule 13D"), relating to the Common Stock, par value $0.0001 per share, of ATechnical Communications Corp, a Massachusetts Corporation. Items 3 and 5 of the Schedule 13D are hereby amended and restated, as follows: ITEM 3 SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION As of September 18, 2006, Hummingbird has caused HVF, Microcap Fund, Concentrated Fund, and Tarsier Fund to invest approximately $66,343, $45,521, $1,009, and $356,656 respectively, in the Shares of the Issuer using their working capital. ITEM 5 INTEREST IN SECURITIES OF THE ISSUER (a) As investment manager of HVF, Microcap Fund, Concentrated Fund, and Tarsier Fund, Hummingbird may be deemed to have the sole voting and investment authority over the Shares owned by HVF, Microcap Fund, Concentrated Fund, and Tarsier Fund for purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended ("Rule 13d-3"), may be deemed to be the beneficial owner of 149,943 Shares representing approximately 10.9% of the outstanding shares of the Issuer (based upon 1,371,691 shares of Common Stock outstanding as of August 1, 2006 as reported on Form 10-QSB for the period ended June 24, 2006. Hummingbird disclaims any beneficial ownership of the Shares covered by this Statement. Mr. Sonkin, as the managing member and control person of Hummingbird, may be deemed to have the sole voting and investment authority over the Shares beneficially owned by Hummingbird and, for purposes of Rule 13d-3, may be deemed to be the beneficial owner of 149,943 Shares representing approximately 10.9% of the outstanding shares of the Issuer. Mr. Sonkin disclaims any beneficial ownership of the Shares covered by this Statement. ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 11 of 14 Pages ------------------------ ---------------------------- HC, as the general partner of each of HVF, Microcap Fund, and Concentrated Fund, Hummingbird may be deemed to have the sole voting and investment authority over the Shares owned by HVF, Microcap Fund, and Concentrated Fund, for purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended ("Rule 13d-3"), may be deemed to be the beneficial owner of 149,943 Shares representing approximately 10.9% of the outstanding shares of the Issuer (based upon 1,367,057 shares of Common Stock outstanding s of August 1, 2006 as reported on Form 10-QSB for the period ended June 24, 2006. Hummingbird disclaims any beneficial ownership of the Shares covered by this Statement. HVF is the beneficial owner of 20,183 Shares or 1.5% of the outstanding shares of the Issuer. Microcap Fund is the beneficial owner of 14,083 Shares or 1.0% of the outstanding shares of the Issuer. Concentrated Fund is the beneficial owner of 334 Shares or 0.0% of the outstanding shares of the Issuer. Tarsier Fund is the beneficial owner of 115,343 Shares or 3.7% of the outstanding shares of the Issuer. (c) Hummingbird caused HVF to effect transactions in the Shares during the past 60 days as set forth below: NUMBER OF DATE TYPE SHARES PRICE/SHARE ---- ---- ------ ----------- 9/15/2006 open market purchase 500 3.10 ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 12 of 14 Pages ------------------------ ---------------------------- Hummingbird caused the Microcap Fund to effect transactions in the Shares during the past 60 days as set forth below: NUMBER OF NUMBER OF DATE TYPE SHARES PRICE/SHARE ---- ---- ------ ----------- 9/15/2006 open market purchase 500 3.10 Hummingbird caused the Concentrated Fund to effect no transactions in the Shares during the past 60 days. Hummingbird caused the Tarsier Fund to effect transactions in the Shares during the past 60 days as set forth below: NUMBER OF NUMBER OF DATE TYPE SHARES PRICE/SHARE ---- ---- ------ ----------- 7/31/2006 open market purchase 3,500 3.307 7/31/2006 open market purchase 1,000 3.300 8/8/2006 open market purchase 1,700 3.250 8/9/2006 open market purchase 2,000 3.250 8/14/2006 open market purchase 3,000 3.280 8/25/2006 open market purchase 6,500 3.250 8/29/2006 open market purchase 3,000 3.150 9/15/2006 open market purchase 17,500 3.053 9/18/2006 open market purchase 8,000 2.834 9/18/2006 open market purchase 17,690 2.982 (d) Inapplicable. (e) Inapplicable. ITEM 6 Inapplicable ITEM 7 Inapplicable ------------------------ ---------------------------- CUSIP No. 878409101 13D Page 13 of 14 Pages ------------------------ ---------------------------- SIGNATURES After reasonable inquiry and to the best of our knowledge and belief, we certify that the information set forth in this statement is true, complete and correct. Dated: September 19, 2006 HUMMINGBIRD MANAGEMENT, LLC By: /s/ Paul D. Sonkin --------------------------------- Name: Paul D. Sonkin Title: Managing Member /s/ Paul D. Sonkin ------------------------------------- PAUL D. SONKIN HUMMINGBIRD VALUE FUND, L.P. By: Hummingbird Capital, LLC By: /s/ Paul D. Sonkin --------------------------------- Name: Paul D. Sonkin Title: Managing Member HUMMINGBIRD MICROCAP VALUE FUND, L.P. By: Hummingbird Capital, LLC By: /s/ Paul D. Sonkin --------------------------------- Name: Paul D. Sonkin Title: Managing Member HUMMINGBIRD CONCENTRATED FUND, L.P. By: Hummingbird Capital, LLC By: /s/ Paul D. Sonkin --------------------------------- Name: Paul D. Sonkin Title: Managing Member TARSIER NANOCAP VALUE FUND, L.P. By: Hummingbird Capital, LLC By: /s/ Paul D. Sonkin --------------------------------- Name: Paul D. Sonkin Title: Managing Member HUMMINGBIRD CAPITAL, LLC By: /s/ Paul D. Sonkin --------------------------------- Name: Paul D. Sonkin Title: Managing Member