<PAGE>

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                               ----------------

                                  Form 10-K/A

      [X]ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

              For the Fiscal Year Ended December 31, 1998

                                       OR

      [_]TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE
         SECURITIES EXCHANGE ACT OF 1934 (No fee required)

                               ----------------

                        COMMUNICATIONS INSTRUMENTS, INC.
             (Exact name of registrant as specified in its charter)

             North Carolina                           56-182-82-70
    (State or other jurisdiction of                 (I.R.S. Employer
     incorporation or organization)               Identification No.)


  1396 Charlotte Highway, Fairview, NC                   28730
    (Address of principal executive                    (Zip Code)
                offices)

       Registrant's telephone number, including area code: (828)628-1711

          Securities registered pursuant to Section 12 (b) of the Act:

                                      NONE

          Securities registered pursuant to Section 12 (g) of the Act:

                                      NONE

   Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(b) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. [X] Yes [_] No

   All of the voting stock of the registrant is held by an affiliate of the
registrant.

   On March 31, 1999, the registrant had 1,000 shares of common stock
outstanding.

   Indicate by check mark if disclosures of delinquent filers pursuant to Item
405 of regulation S-K (Section 229.405 of this chapter) is not contained
herein, and will not be contained, to the best of registrant's knowledge, in
definitive proxy or information statements incorporated by reference in Part
III of this Form 10-K or any amendment to this Form 10-K. [_]


--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>

Explanatory Note
----------------

     On March 31, 1999, Communications Instruments, Inc. filed its Annual Report
on form 10-K for the Fiscal Year Ended December 31, 1998. Due to an inadvertent
error in transmission, however, the Annual Report was filed without a signature
page. As such, this Amendment on form 10-K/A is filed solely for the purpose of
supplementing such Annual Report with its proper signature page.

<PAGE>

                                   SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized on March 31, 1999.

                                           COMMUNICATIONS INSTRUMENTS, INC.

                                           By: /s/ Ramzi A. Dabbagh
                                              --------------------------------
                                                       Ramzi A. Dabbagh,
                                              Chairman of the Board and Chief
                                              Executive Officer

     Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below, by the following persons on behalf of the
registrant and in the capacities indicated on March 31, 1999.

             Signature                                Capacity
             ---------                                --------

         *                                Chairman of the Board, Chief Executive
--------------------------------------    Officer and Director (Principal
Ramzi A. Dabbagh                          Executive Officer)


         *                                Chief Financial Officer (Principal
-------------------------------------     Financial Officer and Principal
 Richard Heggelund                        Accounting Officer)


         *                                President, Chief Operating Officer,
--------------------------------------    and Director
Michael A. Steinbeck


         *                                Executive Vice President and Business
-------------------------------------     Development Director
G. Daniel Taylor


         *                                Director
--------------------------------------
Brian P. Simmons


         *                                Director
-------------------------------------
Andrew W. Code


         *                                Director
--------------------------------------
Steven R. Brown


         *                                Director
-------------------------------------
Jon S. Vesely


         *                                Director
--------------------------------------
Donald Dangott


* The undersigned, by signing his name hereto, does sign and execute this report
  pursuant to the Power of Attorney executed by the above named officers and
  directors of the registrant and filed with the Securities and Exchange
  Commission on behalf of such officers and directors.


 /s/ Ramzi A. Dabbagh
--------------------------------
    Ramzi A. Dabbagh
    Attorney-in-Fact