Exhibit 10.13

                  AMENDMENT NO. 2 TO REVOLVING CREDIT AGREEMENT

THIS AMENDMENT NO. 2 TO CREDIT AGREEMENT (this "Amendment") is made and entered
into as of December 20, 2002 among each of TECHNITROL, INC., a Pennsylvania
corporation (the "Parent"); PULSE ENGINEERING INC., a Delaware corporation, and
AMI DODUCO, INC., a Pennsylvania corporation (the "US Facility Borrowers"); AMI
DODUCO HOLDING GMBH, a company organized under the laws of Germany, AMI DODUCO
GMBH, a company organized under the laws of Germany, AMI DODUCO ESPANA S.L., a
company organized under the laws of Spain, AMI DODUCO ITALIA SRL, a company
organized under the laws of Italy, AMI DODUCO (FRANCE) S.A.S., a company
organized under the Republic of France, AMI DODUCO (UK) LIMITED, a company
organized under the laws of England (the "Offshore Facility Borrowers" and
together with the US Facility Borrowers, the "Borrowers"); EACH OF THE
UNDERSIGNED SUBSIDIARY GUARANTORS OF THE BORROWERS (the "Guarantors"), BANK OF
AMERICA, N.A., and each other lender which may hereafter execute and deliver an
instrument of assignment with respect to the US Facility under this Agreement
pursuant to Section 12.01 (hereinafter such lenders may be referred to
individually as a "US Facility Lender" or collectively as the "US Facility
Lenders"); BANK OF AMERICA, N.A., as lender under the Offshore Facility
(hereinafter an "Offshore Facility Lender"); BANK OF AMERICA, N.A., in its
capacity as agent for the Lenders (the "Agent"); PNC BANK, NATIONAL ASSOCIATION,
as Syndication Agent and as Lender, FLEET NATIONAL BANK, as Documentation Agent
and as Lender, and EACH OF THE FINANCIAL INSTITUTIONS SIGNATORY HERETO.

                              W I T N E S S E T H:

      WHEREAS, the Borrowers, the Lenders party thereto (the "Lenders") and the
Agent have entered into that certain Credit Agreement dated as of June 20, 2001,
as amended pursuant to that certain Amendment No. 1 to Credit Agreement dated as
of May 15, 2002 (the "Credit Agreement"), pursuant to which the Lenders have
made and agreed to make certain Loans to, and issue Letters of Credit for the
account of, the Borrowers; and

      WHEREAS, the Borrowers have requested that the Agent and the Lenders
consent to certain amendments to the Credit Agreement; and

      WHEREAS, subject to the terms and conditions specified below, the Agent
and the Lenders signatory hereto are willing to consent to the requested
amendments;

      NOW, THEREFORE, in consideration of the mutual covenants and the
fulfillment of the conditions set forth herein, the parties hereto do hereby
agree as follows:

      1. Definitions. Any capitalized term used herein without definition shall
have the meaning set forth in the Credit Agreement.

      2. Amendments to the Credit Agreement. Subject to the terms and conditions
set forth herein, the Credit Agreement is hereby amended as follows:

      (a) The definition of "Issuing Bank" in Section 1.01 of the Credit
Agreement is hereby amended in its entirety to read as follows:

            "Issuing Bank" means (a) Bank of America as issuer of Letters of
      Credit under Article III and any successor thereto and (b) any Special
      Issuing Bank.

      (b) The definition of "Letter of Credit" in Section 1.01 of the Credit
Agreement is hereby amended in its entirety to read as follows:

            "Letter of Credit" means (a) a standby or commercial letter of
      credit issued by the Issuing Bank pursuant to Article III hereof,
      including any Offshore Letter of Credit, for the account of any Applicant
      in favor of a Person advancing credit or securing an obligation on behalf
      of such Applicant and (b) an Existing Letter of Credit.


                                       1
<PAGE>

Exhibit 10.13


      (c) The definition of "Offshore Letter of Credit" in Section 1.01 of the
Credit Agreement is hereby amended in its entirety to read as follows:

            "Offshore Letter of Credit" means a standby letter of credit
      denominated in an Offshore Currency issued by the Issuing Bank pursuant to
      Article III hereof for the account of any Applicant in favor of a Person
      advancing credit or securing an obligation on behalf of such Applicant.

      (d) Section 1.01 of the Credit Agreement is hereby amended by adding the
following defined term in alphabetical position therein:

            "Special Issuing Bank" means any Lender (other than Bank of America
      as issuer of Letters of Credit under Article III and any successor
      thereto) agreeing to become an Issuing Bank for Offshore Letters of Credit
      issued under Article III hereof after being designated by the Parent and
      approved by the Agent as an issuer of Offshore Letters of Credit in one or
      more Letter of Credit Currencies and any successor thereto.

      (e) Article III of the Credit Agreement is hereby amended by adding a new
Section 3.06 thereto which shall read as follows:

            3.06 Special Issuing Bank.

            (a) Notwithstanding anything contained in this Article III to the
      contrary, (i) each Special Issuing Bank agrees to issue, and shall be
      authorized to issue, only Offshore Letters of Credit in the Letter of
      Credit Currencies as to which it has been designated a Special Issuing
      Bank, (ii) no Special Issuing Bank shall have any obligation to issue any
      Offshore Letter of Credit unless agreed to by such Special Issuing Bank
      for the specific instance and the specific Offshore Letter of Credit
      requested by a Borrower and (iii) any reference in this agreement to "the
      Issuing Bank" (A) shall be deemed to mean "a Special Issuing Bank" where
      the context requires and (B) in reference to a Letter of Credit, shall be
      deemed to refer to the Issuing Bank having actually issued such Letter of
      Credit.

            (b) Each Special Issuing Bank shall give at least three (3) Business
      Days prior written notice to the Agent of the issuance or renewal of any
      Offshore Letter of Credit requested by a Borrower which notice shall
      include the requested date of issuance or renewal, the applicable Letter
      of Credit Currency, and the amount and expiry date of such Offshore Letter
      of Credit, and such Special Issuing Bank shall not issue or renew such
      Offshore Letter of Credit unless it has received written confirmation from
      the Agent not more than one Business Day Prior to such issuance or renewal
      that, after giving effect to such issuance or renewal, (i) Letter of
      Credit Outstandings will not exceed the Total Letter of Credit Commitment
      and (ii) Total Outstandings will not exceed the Total Commitment, in each
      case, as of the date of such confirmation. Each Special Issuing Bank shall
      deliver to the Agent on the last Business Day of each calendar month
      written notice by telefacsimile or otherwise of the aggregate amount of
      Letter of Credit Outstandings attributable to Offshore Letters of Credit
      issued by such Special Issuing Bank on such date. The applicable Special
      Issuing Bank shall also give the Agent written notice by telefacsimile or
      otherwise of each of the following events within one (1) Business Day of
      the occurrence thereof: (A) receipt of any request for a drawing under an
      Offshore Letter of Credit, including the amount thereof, (B) any
      reimbursement paid with respect to amounts drawn under any Offshore Letter
      of Credit, (C) any increase in the amount of any Offshore Letter of Credit
      and (D) any reduction, termination, cancellation or expiry of any Offshore
      Letter of Credit.

            (c) All notices to be delivered to a Special Issuing Bank shall be
      directed to the address specified in Section 12.02(d) for such Special
      Issuing Bank as a Lender unless written instructions to the contrary are
      delivered to the Agent and any applicable Applicant.


                                       2
<PAGE>

Exhibit 10.13


            (d) If a Lender that is also a Special Issuing Bank shall assign all
      of its rights and obligations as a Lender under this Agreement, any
      outstanding Offshore Letter of Credit issued by such Special Issuing Bank
      hereunder shall, upon the effective date of such assignment and without
      any further action or notice, cease to constitute a Letter of Credit or
      Offshore Letter of Credit hereunder and no reimbursement or other
      obligation thereafter arising under such letter of credit shall constitute
      Reimbursement Obligations hereunder or otherwise be part of the
      Obligations hereunder.

      3. Conditions to Effectiveness. This Amendment shall become effective only
upon the receipt by the Agent, in form and substance satisfactory to it, of four
executed counterparts of this Amendment executed by the Borrowers, the
Guarantors and the Required Lenders.

      4. Representations and Warranties. In order to induce the Agent and the
Lenders to enter into this Amendment, each Borrower represents and warrants to
the Agent and the Lenders as follows:

            (a) The representations and warranties made by the Borrowers or
      Guarantor in Article VII of the Credit Agreement and in each of the other
      Loan Documents to which it is a party after giving effect to the
      transactions contemplated by this Amendment are true and correct in all
      material respects on and as of the date hereof, except to the extent that
      such representations and warranties expressly relate to an earlier date
      (in which case they continue to be true as of such earlier date);

            (b) There has been no material adverse change in the condition,
      financial or otherwise, of the Parent and its Subsidiaries, taken as a
      whole, since the date of the most recent financial reports of the Parent
      received by each Agent and the Lenders under Section 8.08 of the Credit
      Agreement;

            (c) The execution, delivery and performance by each Borrower and
      each Guarantor of this Amendment are within its corporate powers, have
      been duly authorized by all necessary corporate action and do not
      contravene (i) its charter or by-laws, (ii) any applicable laws or (iii)
      any legal or contractual restriction binding on or affecting any Borrower
      or any Subsidiary; and such execution, delivery and performance do not or
      will not result in or require the creation of any Lien upon or with
      respect to any of its properties.

            (d) This Amendment constitutes the legal, valid and binding
      obligation of each Borrower and each Guarantor, enforceable against each
      Borrower and each Guarantor in accordance with its terms, except to the
      extent enforceability may be limited by bankruptcy, insolvency fraudulent
      conveyance, reorganization, moratorium or similar laws affecting the
      enforceability of creditor's rights generally or by equitable principles
      of general application (whether considered in an action at law or in
      equity).

            (e) No governmental approval is required for the due execution,
      delivery and performance by each Borrower of this Amendment, except for
      such governmental approvals as have been duly obtained or made and which
      are in full force and effect on the date hereof and not subject to appeal.

            (f) There are no pending or threatened actions, suits or proceedings
      affecting any Borrower or any Subsidiary or the properties of any Borrower
      or any Subsidiary before any court, governmental agency or arbitrator,
      that may, if adversely determined, materially adversely affect the
      financial condition, properties, business, operations or prospects of the
      Parent and it Subsidiaries, considered as a whole, or affect the legality,
      validity or enforceability of this Amendment or any other Loan Document.

            (g) No Default or Event of Default has occurred and is continuing.

      5. Full Force and Effect of Agreement. Except as hereby specifically
amended, modified or supplemented, the Credit Agreement and all other Loan
Documents are hereby confirmed and ratified in all respects by each party hereto
and shall be and remain in full force and effect according to their respective
terms.


                                       3
<PAGE>

Exhibit 10.13


      6. Counterparts. This Amendment may be executed in any number of
counterparts, each of which shall be deemed an original as against any party
whose signature appears thereon, and all of which shall together constitute one
and the same instrument.

      7. Governing Law. This Amendment shall in all respects be governed by, and
construed in accordance with, the laws of the state of New York.

      8. Enforceability. Should any one or more of the provisions of this
Amendment be determined to be illegal or unenforceable as to one or more of the
parties hereto, all other provisions nevertheless shall remain effective and
binding on the parties hereto.

      9. References. All references in any of the Loan Documents to the "Credit
Agreement" shall mean the Credit Agreement as amended hereby.

      10. Successors and Assigns. This Amendment shall be binding upon and inure
to the benefit of the Borrowers, the Guarantors, the Lenders, the Agent and
their respective successors, assigns and legal representatives; provided,
however, that the Borrowers and the Guarantors, without the prior consent of the
Lenders, may not assign any rights, powers, duties or obligations hereunder.

      11. Consent of Guarantors. Each of the Guarantors joins in the execution
of this Amendment for the purposes of consenting to the amendments to the Credit
Agreement contained herein and for the further purpose of confirming its
guaranty of all Borrowers' Liabilities (as defined in the Facility Guaranties).


                                       4