Document:

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                                  EXHIBIT 10(r)

                          AMENDMENT TO PROMISSORY NOTE
                          ----------------------------

         This Amendment to Promissory Note ("the Amendment") is made at
Columbus, Ohio as of February 21st, 2002 ("the Effective Date"), by Pinnacle
Data Systems, Inc. ("Borrower"), and agreed to and acknowledged by KEYBANK
NATIONAL ASSOCIATION ("Lender").

                                   WITNESSETH:
                                   ----------

         WHEREAS, Borrower executed and delivered to Lender a certain
Promissory Note dated as of August 10, 2000, in the principal amount of Seven
Million and 00/100 Dollars ($7,000,000.00), as it may from time to time be
amended, restated or otherwise modified (the "Note"); and

         WHEREAS, each term herein shall be defined in accordance with the Note;
and

         WHEREAS, Borrower and Lender desire to modify the principal amount and
the interest rate.

         NOW, THEREFORE, for good and valuable consideration, including the
terms and conditions of this Amendment, the receipt and sufficiency of which
are hereby acknowledged, Borrower states as follows:

     1.     The Note is hereby amended to delete "Principal Amount" in its
entirety and replace it with the following: "Principal Amount": $6,000,000.00.

     2.     The Note is hereby amended to delete "Initial Rate" in its entirety
and replace it with the following: "Initial Rate":  4.750%.

     3.     The Note is hereby amended to delete the section "Promise to Pay"
in its entirety and replace it with the following:

            "Promise to Pay" Pinnacle Data Systems, Inc. ("Borrower")
            ----------------
     promises to pay to KeyBank National Association ("Lender"), or order,
     in lawful money of the United States of America, on demand, the
     principal amount of Six Million & 00/100 Dollars ($6,000,000.00) or so
     much as may be outstanding, together with interest on the unpaid
     outstanding principal balance of each advance. Interest shall be
     calculated from the date of each advance until repayment of each
     advance.

     4.     The Note is amended to delete the Section "Variable Interest
Rate" in its entirety and to replace it with the following:

            "Variable Interest Rate" The interest rate on this Note is
            ------------------------
     subject to change from time to time based on changes in an index which
     is the Key Bank Prime (the "Index"). The interest rate will change on
     the date of each announced change of the Index within KeyBank. The
     Index is not necessarily the lowest rate charged by

                                      -1-

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     Lender on its loans and is set by Lender in its sole discretion. If
     the Index becomes unavailable during the term of this loan, the Lender
     may designate a substitute index after notifying Borrower. Lender will
     tell Borrower the current Index upon Borrower's request. Borrower
     understands that Lender may make loans based on other rates as well
     The interest rate change will not occur more often than each day that
     the rate changes. The Index currently is 4.750%. The interest rate to be
     applied to the unpaid principal balance of this Note will be at a rate
     equal to the Index, resulting in an initial rate of 4.750% per annum
     NOTICE: Under no circumstances will the interest rate on this Note be more
     than the maximum rate allowed by applicable law.

     5.     No possible Event of Default exists under the Note, nor will any
occur immediately after the execution and delivery of this Amendment or by the
performance or observance of any provision hereof.

     6.     Each reference that is made in any related security documents or
any other writing shall hereafter be construed as a reference to the Note as
amended hereby.

     7.     Except as expressly set forth in this Amendment, all other
conditions, covenants, obligations, provisions and terms set forth in the Note
and any security documents and in effect as of the Effective Date shall remain
in full force and effect, including, without limitation, the following for
further acknowledgment:

            Borrower authorizes any attorney at law at any time or times
     after maturity, to appear in any state or federal court of record in
     the United States of America, to waive the issuance and service of
     process, to admit the maturity of this Note and the nonpayment thereof
     when due, to confess judgment against Borrower in favor of the holder
     of this Note for the amount then appearing due, together with interest
     and costs of suit, and thereupon to release all errors and to waive all
     rights of appeal and stay of execution. The foregoing warrant of
     attorney shall survive any judgment, and if any judgment be vacated for
     any reason, the holder thereof nevertheless may thereafter use the
     foregoing warrant of attorney to obtain an additional judgment or
     judgments against Borrower. Borrower agrees that Lender=s attorney may
     confess judgment pursuant to the foregoing warrant of attorney
     Borrower further agrees that the attorney confessing judgment pursuant
     to the foregoing warrant of attorney may receive a legal fee or other
     compensation from Lender.

                                      -2-

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WARNING --BY SIGNING THIS PAPER YOU GIVE UP YOUR RIGHT TO NOTICE AND COURT
TRIAL. IF YOU DO NOT PAY ON TIME A COURT JUDGMENT MAY BE TAKEN AGAINST YOU
WITHOUT YOUR PRIOR KNOWLEDGE AND THE POWERS OF A COURT CAN BE USED TO COLLECT
FROM YOU REGARDLESS OF ANY CLAIMS YOU MAY HAVE AGAINST THE CREDITOR WHETHER FOR
RETURNED GOODS, FAULTY GOODS, FAILURE ON HIS PART TO COMPLY WITH THE AGREEMENT
OR ANY OTHER CAUSE.
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                                              PINNACLE DATA SYSTEMS, INC.

                                              By: Michael R. Sayre
                                              Its:  Executive Vice President

                                              AGREED TO AND ACKNOWLEDGED BY:

                                              KEYBANK NATIONAL ASSOCIATION

                                              By:      Mary L. Patton
                                              Title:   Vice President

                                      -3-<PAGE>

                                 EXHIBIT 10(S)

                            FIRST AMENDMENT AGREEMENT
                            -------------------------

     This First Amendment Agreement made as of the 21st day of February, 2002,
by and between Pinnacle Data Systems, Inc. (the "Borrower") and KeyBank National
Association (the "Lender"):

     WHEREAS, Borrower and Lender are parties to a certain Loan Agreement dated
August 10, 2000, as it may from time to time be amended, supplemented or
otherwise modified (the "Loan Agreement");

     WHEREAS, Borrower and Lender desire to amend the Loan Agreement by
decreasing the amount of the line of credit and by modifying certain other
provisions thereof; and

     WHEREAS, each term used herein shall be defined in accordance with the
Loan Agreement.

     NOW, THEREFORE, in consideration of the premises and of the mutual
covenants herein and for other valuable considerations, Borrower and Lender
agree as follows:

     1.   The Loan Agreement is hereby amended by deleting the definition of
"Borrowing Base" in its entirety and by inserting in place thereof the
following:

     The words "Borrowing Base" mean, as determined by Lender from time to
time, the lesser of: (a) $6,000,000.00 or (b) the sum of (i) 85.000% of the
aggregate amount of Eligible Accounts less than 90 days, plus (ii) 50.000% of
the aggregate amount of Eligible Inventory (not to exceed in corresponding Loan
amount, based on Eligible Inventory, $3,000,000.00).

     2.   The Credit Agreement is hereby amended by adding the following new
definitions to the section "Definitions":

     "EBITDA" means the net earnings of Borrower plus the aggregate amounts
deducted in determining such net income in respect of interest expenses, taxes,
depreciation and amortization; but not, however, giving effect to extraordinary
losses or gains in calculating net income.

     "Subordinated Debt" means Indebtedness and liabilities of Borrower which
have been subordinated by written agreement to Indebtedness owed by
Borrower to Lender in form and substance acceptable to Lender.

     "Tangible Net Worth" means Borrower's total assets excluding all intangible
assets (i.e., goodwill, trademarks, patents, copyrights, organization expenses,
and similar intangible items, but including leaseholds and leasehold
improvements) less Total Debt.

     "Total Debt" means all of Borrower's liabilities including Subordinated
     Debt.

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     3.   The Credit Agreement is hereby amended by adding the following
section "Financial Covenants":

     Borrower covenants and agrees with Lender that while this Agreement is in
     effect, Borrower shall:

     A) Maintain a cumulative minimum EBITDA based upon the financial statements
        of Borrower for the most recently completed four fiscal quarters which
        shall be tested on a quarterly basis as follows:

        As of Borrower's first fiscal quarter, March 31, 2002: **** $(340,000)

        As of Borrower's second fiscal quarter, June 30, 2002: **** $250,000

     B) Maintain a Total Debt to Tangible Net Worth ratio of greater than
        or equal to 2.50 to 1.00 which shall be tested on a quarterly basis
        based upon the financial statements of Borrower for the most
        recently completed fiscal quarter.

     4.   Borrower hereby represents and warrants to Lender that (a) Borrower
has the legal power and authority to execute and deliver this First Amendment
Agreement; (b) officials executing this First Amendment Agreement have been duly
authorized to execute and deliver the same and bind Borrower with respect to the
provisions hereof; (c) the execution and delivery hereof by Borrower and the
performance and observance by Borrower of the provisions hereof do not violate
or conflict with the organizational agreements of Borrower or any law applicable
to Borrower or result in a breach of any provision of or constitute a default
under any other agreement, instrument or document binding upon or enforceable
against Borrower; (d) no Event of Default exists under the Loan Agreement, nor
will any occur immediately after the execution and delivery of the First
Amendment Agreement or by the performance or observance of any provision hereof;
(e) neither Borrower (nor any subsidiary) has any claim or offset against, or
defense or counterclaim to, any of Borrower's (or any subsidiary's) obligations
or liabilities under the Loan Agreement or any Related Documents, and Borrower
(and each subsidiary) hereby waives and releases Lender from any and all such
claims, offsets, defenses and counterclaims of which Borrower (and any
subsidiary) is aware, such waiver and release being with full knowledge and
understanding of the circumstances and effect thereof and after having consulted
legal counsel with respect thereto, and (f) this First Amendment Agreement
constitutes a valid and binding obligation of Borrower in every respect,
enforceable in accordance with its terms.

     5.   Each reference that is made in the Loan Agreement or any other writing
shall hereafter be construed as a reference to the Loan Agreement as amended
hereby. Except as herein otherwise specifically provided, all provisions of the
Loan Agreement shall remain in full force and effect and be unaffected hereby.

     6.   The rights and  obligations of all parties hereto shall be governed
by the laws of the State of Ohio.

**** represents greater than or equal to.

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     7.   JURY TRIAL WAIVER. BORROWER AND LENDER WAIVE ANY RIGHT TO HAVE A JURY
PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT OR
OTHERWISE, BETWEEN BORROWER AND LENDER, ARISING OUT OF, IN CONNECTION WITH,
RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED BETWEEN THEM IN
CONNECTION WITH THIS AGREEMENT OR ANY NOTE OR OTHER INSTRUMENT, DOCUMENT OR
AGREEMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH OR THE TRANSACTIONS
RELATED THERETO. THIS WAIVER SHALL NOT IN ANY WAY AFFECT, WAIVE, LIMIT, AMEND
OR MODIFY LENDER'S ABILITY TO PURSUE REMEDIES PURSUANT TO ANY CONFESSION OF
JUDGMENT OR COGNOVIT PROVISION CONTAINED IN ANY NOTE OR OTHER INSTRUMENT,
DOCUMENT OR AGREEMENT BETWEEN BORROWER AND LENDER.

Address:     Pinnacle Data Systems, Inc.      PINNACLE DATA SYSTEMS, INC.
             6600 Port Road
             Groveport, Ohio  43125
             Attn: Michael R. Sayre           By: Michael R. Sayre
                                                                  --------------
                                              Its:Executive Vice President
                                                                          ------

Address:     Key Bank National Association    KEY BANK NATIONAL ASSOCIATION
             88 East Broad Street
             Columbus, Ohio  43215
             Attn: Roger D. Campbell          By:   Mary L. Patton
                                                  ------------------------
                                              Its:  Vice President
                                                  ------------------------

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