Document:

EXHIBIT 10.21(I)

                                                  December 21, 2006

Mr. David Ott
One Ethan Allen Court
South Setauket, NY 11720

Dear David:

Your Employment Agreement, dated as of January 1, 2004, between you and ATC (the
"Agreement") expires on December 31, 2006. The Compensation Committee of the
Board of Directors would like to extend the "Term" as defined in the Agreement
to end on December 31, 2007.

All other terms of your employment as provided in the Agreement shall continue.
As modified by this letter, the Agreement shall remain in full force and effect.

If you are in agreement with the foregoing, please sign the two copies of this
letter in the space provided and return them to me.

Please call me if you have any questions.

                                                  Very truly yours,

                                                  /S/ Kathleen M. Kelly
                                                  ------------------------------
                                                  Kathleen M. Kelly
                                                  Vice President, Administration

KMK

ACCEPTED AND AGREED TO:

/S/ David Ott
------------------------
David OttEXHIBIT 10.25(I)

               AMENDMENT NO. 1 TO THE LOAN AND SECURITY AGREEMENT

AMENDMENT NO. 1 entered into January 25, 2007 effective as of November 30, 2006
("Amendment No. 1") to the Loan and Security Agreement dated as of November 30,
2004 by and between AMERICAN TECHNICAL CERAMICS CORP., a Delaware corporation
("Borrower") and COMMERCE BANK, N.A., a national banking association ("Bank").

                              W I T N E S S E T H :

      WHEREAS, as of November 30, 2004, Borrower and Bank had entered into a
certain loan and security agreement, as extended on or about November 30, 2005,
as further extended and amended by this Amendment No. 1, as may be further
amended from time to time;

      WHEREAS, Borrower has requested that Bank, among other things, extend the
Revolving Credit Maturity Date (as defined in the Loan Agreement) to November
30, 2007, and the Bank has agreed to do so, in the manner set forth below;
provided however, that, among other things, Borrower execute this Amendment No.
1.

      NOW, THEREFORE, in consideration of the mutual promises and for other good
and valuable consideration, the receipt of which is hereby acknowledged, the
parties hereto agree as follows:

      1.    The definition of "Agreement" or "Loan Agreement" is hereby amended
to read in its entirety as follows:

            AGREEMENT means the loan and security agreement dated as
            of November 30, 2004, by and between Borrower and Bank,
            including all exhibits thereto, as extended on or about
            November 30, 2005, as amended by this Amendment No. 1,
            as the same may be amended or otherwise modified from
            time to time; the terms "herein", "hereunder" and like
            terms shall be taken as referring to the Agreement in
            its entirety and shall not be limited to any particular
            section or provision thereof.

      2.    The definition of "Revolving Credit Maturity Date" contained in
Section 1.1. of the Agreement is hereby amended to read in its entirety as
follows:

            REVOLVING CREDIT MATURITY DATE means November 30, 2007,
            or such later date as Bank may, in its sole and absolute
            discretion, designate in writing to Borrower.

                                        1

      3.    Lender has agreed to release its security interest in Inventory.
Therefore, Section 3.1 of the Agreement is hereby amended to read in its
entirety as follows:

            3.1   Collateral: As security for the payment of the
            Obligations, and satisfaction by Borrower of all
            covenants and undertakings contained in this Agreement
            and the other Loan Documents, Borrower hereby assigns
            and grants to Lender, a continuing Lien on and security
            interest in the following Property, all whether now
            owned or hereafter acquired, created or arising and
            wherever located:

                  a.    Accounts - All Accounts; and

                  b.    Proceeds - The Proceeds (including, without
            limitation, insurance proceeds), whether cash or
            non-cash, of all of the foregoing property described in
            clause (a).

      4.    Bank shall execute, deliver and file UCC-3 Termination Statements
and otherwise take such action as Borrower may reasonably request in order to
release Bank's Lien and security interest in and to Borrower's Inventory.

      5.    Section 6.8 of the Agreement is hereby amended to read in its
entirety as follows:

            Financial Covenants: Borrower shall maintain and comply
            with the following financial covenants:

                        a.    Tangible Net Worth - Borrower shall
            maintain at all times Tangible Net Worth of not less
            than $60,000,000, to be tested quarterly based upon the
            financial statements required to be submitted hereunder.

                        b.    Leverage Ratio - Borrower shall
            maintain a Leverage Ratio of not more than .5 to 1.0,
            measured as of each fiscal quarter end.

      6.    Borrower represents and warrants to Bank that there are no offsets,
defenses or counterclaims to the payment of the Indebtedness owing Bank, and to
the continuing general security interest in the Collateral granted to Bank by
Borrower as security for payment of the Indebtedness, as fully described in the
Agreement.

      7.    Except as modified herein, all other provisions of the Agreement and
the other Loan Documents remain unmodified and are in full force and effect.

      8.    Capitalized terms not otherwise defined herein shall have the
meanings ascribed to such terms in the Agreement.

                                        2

      9.    This Amendment No. 1 and the other Loan Documents, and the rights
and obligations of the parties hereunder or thereunder, as the case may be, will
be construed and interpreted in accordance with the laws of the State of New
York (the "Governing State" ) (excluding the laws applicable to conflicts or
choice of law).

      IN WITNESS WHEREOF, the parties have executed this Amendment No. 1 as of
the day and year first above written.

                                               AMERICAN TECHNICAL CERAMICS CORP.

                                               By:   /S/ Andrew Perz
                                                  -----------------------------
                                                         Andrew Perz
                                                   Vice-President - Controller

                                               COMMERCE BANK, N.A.

                                               By:   /S/ Richard Ohl
                                                  -----------------------------
                                                         Richard Ohl
                                                       Vice President:

                                        3EXHIBIT 10.26(I)

                    AMENDMENT NO. 1 TO THE SECURITY AGREEMENT

AMENDMENT NO. 1 entered into January 25, 2007 effective as of November 30, 2006
("Amendment No. 1") to the Security Agreement dated as of November 30, 2004 by
and between AMERICAN TECHNICAL CERAMICS (FLORIDA) INC., a Florida corporation
("Guarantor"), and COMMERCE BANK, N.A., a national banking association
("Lender").

                              W I T N E S S E T H:

      WHEREAS, as of November 30, 2004, AMERICAN TECHNICAL CERAMICS CORP., a
Delaware corporation ("Borrower"), and Lender had entered into a certain loan
agreement, as extended on or about November 30, 2005, as further extended by an
Amendment No. 1 thereto entered into on the date hereof effective as of November
30, 2006, as same as may be further amended from time to time;

      WHEREAS, as of November 30, 2004, Guarantor executed and delivered to
Lender its Surety Agreement ("Surety Agreement") and Security Agreement granting
a general security interest in Accounts and Inventory ("Agreement")

      WHEREAS, Guarantor has requested that Lender release its general security
agreement in Inventory and the Lender has agreed to do so, in the manner set
forth below; provided however, that, among other things, Guarantor execute this
Amendment No. 1.

      NOW, THEREFORE, in consideration of the mutual promises and for other good
and valuable consideration, the receipt of which is hereby acknowledged, the
parties hereto agree as follows:

            1.    Lender has agreed to release its security interest in
Inventory. Therefore, Section 2. of the Agreement is hereby amended to read in
its entirety as follows:

      SECTION 2. GRANT OF SECURITY INTERESTS. As security for the prompt payment
in full and performance of all of Obligations, whether presently existing or
hereafter arising, Guarantor hereby authorizes the Lender to file financing
statements against and pledges and grants to Lender a first priority lien upon
and security interest in the following assets of Guarantor (collectively, the
"Collateral"):

            a.    Accounts; and

            b.    all Proceeds of any of the foregoing, including cash and
non-cash proceeds as defined in the Code, and including (i) proceeds of any
insurance, indemnity, warranty or guaranty

                                        1

payable to Lender or Guarantor from time to time with respect to the Accounts,
(2) payments in any form made or due an payable to Lender or Guarantor in
connection with any requisition, confiscation, condemnation, seizure of
forfeiture of any Account or any proceeds thereof, and (3) all other amounts
paid or payable under or in connection with any Account .

            The security interest granted hereunder shall extend and
            attach to all Accounts and the proceeds thereof, which
            are owned by the Guarantor or in which the Guarantor has
            any interest whether held by the Guarantor or others for
            its account.

            The property described in subparagraphs above, together
            with all accessions, additions, replacements,
            substitutions, proceeds and products as aforesaid, is
            referred to collectively hereinafter as the "Collateral"
            and sometimes as "Pledged Property".

            Guarantor shall execute and deliver such financing
            statements and other documents (in form and substance
            reasonably satisfactory to Lender), and take such other
            actions, as Lender may reasonably request from time to
            time in order to create, perfect or continue the
            security interests provided for above under the UCC or
            other laws of the States of New York or Florida or under
            any other state or federal law. In addition, the
            Guarantor authorizes the Lender to complete and file
            financing statements covering the Collateral described
            above.

      5.    Lender shall execute, deliver and file UCC-3 Termination Statements
and otherwise take such action as Guarantor may reasonably request in order to
release Lender's Lien and security interest in and to Guarantor's Inventory.

      6.    The text of Section 3 (c) of the Agreement is hereby deleted in its
entirety and replaced with the words "Intentionally Omitted."

      7.    Section 4 (c) of the Agreement is hereby amended in its entirety to
read as follows:

            "(c) From time to time, as requested by Lender, deliver in form and
            content satisfactory to Lender an updated list of Guarantor's
            Accounts."

      8.    The text of Section 4 (g) of the Agreement is hereby deleted in its
entirety and replaced with the words "Intentionally Omitted."

      9.    Guarantor represents and warrants to Lender that there are no
offsets, defenses or counterclaims to the payment of the Obligations under the
Surety Agreement, and to the continuing general security interest in the
Collateral granted to Lender by Guarantor as security for payment of the
Obligations, as fully described in the Surety Agreement and Agreement.

                                        2

      10.   Except as modified herein, all other provisions of the Agreement and
the Surety Agreement remain unmodified and are in full force and effect.

      11.   Capitalized terms not otherwise defined herein shall have the
meanings ascribed to such terms in the Agreement.

      12.   This Amendment No. 1, the Security Agreement and the Surety
Agreement (for purposes herein, the "Loan Documents") and the rights and
obligations of the parties hereunder or thereunder, as the case may be, will be
construed and interpreted in accordance with the laws of the State of New York
(the "Governing State") (excluding the laws applicable to conflicts or choice of
law).

      IN WITNESS WHEREOF, the parties have executed this Amendment No. 1 as of
the day and year first above written.

                                     AMERICAN TECHNICAL CERAMICS (FLORIDA), INC.

                                   By:    /S/ Andrew Perz
                                       -----------------------------
                                              Andrew Perz
                                        Vice-President - Controller

                                   COMMERCE BANK, N.A.

                                   By:    /S/ Richard Ohl
                                       -----------------------------
                                              Richard Ohl
                                            Vice President

                                        3

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