Document:

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                                                                   Exhibit 10.38

                          EIGHTH AMENDED AND RESTATED
                           REVOLVING PROMISSORY NOTE
                     (Exim Bank-Guaranteed Line of Credit)

Facility Amount:                               Effective Date: November 30, 2003
U.S. $2,000,000.00                                                 Dallas, Texas

Bank:                                        Borrower:

BANK OF AMERICA, N.A.                        DREW SCIENTIFIC, INC./d/b/a DANAM
                                             ELECTRONICS
Commercial Banking Group
901 Main Street, 7th Floor                   4230 Shilling Way
TX1-492-07-01                                Dallas, Texas 75237
Dallas, Texas 75202

Dallas County                                Dallas County

This Eighth Amended and Restated Revolving Promissory Note effective as of
November 30, 2003(this "NOTE") is an amendment and restatement of that certain
Seventh Amended and Restated Revolving Promissory Note dated effective as of
September 30, 2003 in the principal amount of $2,000,000 by Borrower in favor of
Bank (the "ORIGINAL NOTE"). This Note represents an extension of the maturity
date of the Original Note. The Borrower was formerly known as "MWI, Inc." and
has changed its name to Drew Scientific, Inc., pursuant to Articles of Amendment
adopted effective October 1, 2002.

FOR VALUE RECEIVED, the undersigned Borrower unconditionally (and jointly and
severally, if more than one) promises to pay to the order of Bank, its
successors and assigns, without setoff, at its offices indicated at the
beginning of this Note, or at such other place as may be designated by Bank, the
principal amount of Two Million and No/100 Dollars ($2,000,000.00), or so much
thereof as may be advanced from time to time in immediately available funds,
together with interest computed daily on the outstanding principal balance
hereof, at an interest rate, and in accordance with the payment schedule, set
forth in that certain Amended and Restated Loan Agreement (Ex-Im Bank-
Guaranteed Line of Credit) dated effective September 30, 2001 by and between
Bank and Borrower, as amended by that certain First Amendment to Amended and
Restated Loan Agreement dated as of January 7, 2002, as further amended by that
certain Second Amendment to Amended and Restated Loan Agreement dated as of July
8, 2002 (but effective on June 30, 2002) and as further amended by that certain
Third Amendment to Amended and Restated Loan Agreement (Ex-Im Bank Guaranteed
Line of Credit) effective on August 30, 2002, as further amended by that certain
Fourth Amendment to Amended and Restated Loan Agreement (Ex-Im Bank Guaranteed
Line of Credit) effective on September 30, 2002, and as further amended by the
certain Fifth Amendment to Amended and Restated Loan Agreement (Ex-Im
Bank-Guaranteed Line of Credit) effective as of September 30, 2003, and as
further amended by that certain Sixth Amendment to Amended and Restated Loan
Agreement (Ex-Im Bank-Guaranteed Line of Credit) effective as of November 30,
2003 (collectively, the "LOAN AGREEMENT").

1. MATURITY DATE; PAYMENT SCHEDULE; MANDATORY PRINCIPAL PAYMENT. Principal shall
be paid in full in a single payment on May 31, 2004. Interest thereon shall be
paid monthly, commencing on December 1, 2003 and continuing on the same day of
each successive month thereafter, with a final payment of all unpaid interest on
the last day of the Availability Period (as defined in the Loan Agreement). In
addition to the principal payment schedule set forth above, each advance
hereunder shall be due and payable on the earlier of the following: (i)
immediately upon Borrower's receipt of payment from an account debtor

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against the corresponding account receivable, (ii) 180 days after the making of
such advance or (iii) the last day of the Availability Period. Total or partial
prepayments may be made at any time. If Borrower is in default under this Note
or the Loan Agreement, Bank may demand payment of the balance outstanding under
this Note in full immediately. All payments received hereunder shall be applied
in the order set forth in the Loan Agreement.

2. REVOLVING FEATURE. Borrower may borrow, repay and reborrow hereunder at any
time, up to a maximum aggregate amount outstanding at any one time equal to the
Maximum Amount (as defined in the Loan Agreement), provided that Borrower is not
in default under any provision of this Note or the Loan Agreement, and provided
that the borrowings hereunder do not exceed any borrowing base or other
limitation on borrowings by Borrower. Bank shall incur no liability for its
refusal to advance funds based upon its determination that any conditions of
such further advances have not been met. Bank records of the amounts borrowed
from time to time shall be conclusive proof thereof. In addition, Bank may
refuse to make additional advances or reduce the amount of advances available as
provided in the Loan Agreement.

3. SUBJECT TO LOAN AGREEMENT. This Note shall be governed by the Loan Agreement,
and all provisions regarding advances, interest, prepayment, late payments,
events of default, remedies and governing law are set forth in the Loan
Agreement.

4. COMMERCIAL PURPOSES. BORROWER REPRESENTS TO BANK THAT THE PROCEEDS OF THIS
LOAN ARE TO BE USED PRIMARILY FOR BUSINESS, COMMERCIAL OR AGRICULTURAL PURPOSES.
BORROWER ACKNOWLEDGES HAVING READ AND UNDERSTOOD, AND AGREES TO BE BOUND BY, ALL
TERMS AND CONDITIONS OF THIS NOTE AND HEREBY EXECUTES THIS NOTE UNDER SEAL AS OF
THE DATE HERE ABOVE WRITTEN.

5. NOTICE OF FINAL AGREEMENT. THIS WRITTEN PROMISSORY NOTE REPRESENTS THE FINAL
AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

6. JUDICIAL PROCEEDINGS; WAIVERS. BORROWER AND BANK ACKNOWLEDGE AND AGREE THAT
(a) ANY SUIT, ACTION OR PROCEEDING, WHETHER CLAIM OR COUNTERCLAIM, BROUGHT OR
INSTITUTED BY BORROWER OR BANK OR ANY SUCCESSOR OR ASSIGN OF BORROWER OR BANK,
ON OR WITH RESPECT TO THIS AGREEMENT, ANY OF THE OTHER LOAN DOCUMENTS, THE
COLLATERAL OR THE DEALINGS OF THE PARTIES WITH RESPECT HERETO OR THERETO SHALL
BE TRIED ONLY BY A COURT AND NOT BY A JURY, AND EACH PARTY WAIVES THE RIGHT TO
TRIAL BY JURY; (b) EACH WAIVES ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER, IN ANY
SUCH SUIT, ACTION OR PROCEEDING, ANY SPECIAL, EXEMPLARY, PUNITIVE OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES OTHER THAN, OR IN ADDITION TO, ACTUAL
DAMAGES; AND (c) THIS SECTION IS A SPECIFIC AND MATERIAL ASPECT OF THIS NOTE,
AND BANK WOULD NOT EXTEND CREDIT IF THE WAIVERS SET FORTH IN THIS SECTION WERE
NOT A PART OF THIS NOTE.

EFFECTIVE DATE: NOVEMBER 30, 2003

EXECUTION DATE: DECEMBER 5, 2003

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                                   DREW SCIENTIFIC, INC./d/b/a DANAM ELECTRONICS

                                   By:/s/ Keith Raymond Drew
                                      --------------------------------
                                      Keith Raymond Drew
                                      President and Chief Executive Officer
                                      and

                                   By:/s/ James B. Acock
                                      ------------------------------
                                      Print Name: James B. Acock
                                      Title: Treasurer,  Secretary and Chief
                                             Financial Officer

Receipt of delivery of this Note is hereby acknowledged by:

Bank of America, N.A.

By:/s/ John Clarke
   --------------------------
   John Clarke
Title: VP<PAGE>
                                                                   Exhibit 10.39

                            RATIFICATION OF GUARANTY
                      (Exim Bank-Guaranteed Line of Credit)

      THIS RATIFICATION OF GUARANTY (the "RATIFICATION") is effective on
November 30, 2003, by DREW SCIENTIFIC GROUP PLC ("GUARANTOR"), in favor of BANK
OF AMERICA, N.A. (the "LENDER").

                                    RECITALS

      A. Guarantor has executed a Guaranty dated April 3, 2001 (the "GUARANTY")
in favor of Lender in connection with a Loan Agreement (Exim Bank-Guaranteed
Line of Credit) dated as of June 1, 2000 as amended by a First Amendment to Loan
Agreement dated as of April 3, 2001, as amended by a Second Amendment to Loan
Agreement (Exim Bank- Guaranteed Line of Credit) dated as of June 30, 2001
between Drew Scientific, Inc., d/b/a Danam Electronics, formerly known as MWI,
Inc. d/b/a Danam Electronics ("BORROWER") and Lender (collectively, the
"ORIGINAL LOAN AGREEMENT"). The Original Loan Agreement was amended and restated
by that certain Amended and Restated Loan Agreement (Ex-Im Bank Guaranteed Line
of Credit) effective as of September 30, 2001 by and between Borrower and
Lender, as further amended by that certain First Amendment to Amended and
Restated Loan Agreement (Ex-Im Bank Guaranteed Line of Credit) effective on
January 7, 2002 between Borrower and Lender, as further amended by that certain
Second Amendment to Amended and Restated Loan Agreement (Ex-Im Bank Guaranteed
Line of Credit) dated as of July 8, 2002 (but effective on June 30, 2002), as
further amended by that certain Third Amendment to Amended and Restated Loan
Agreement (Ex-Im Bank Guaranteed Line of Credit) dated as of September 5, 2002
(but effective on August 30, 2002) and further amended by that certain Fourth
Amendment to Amended and Restated Loan Agreement (Ex-Im Bank Guaranteed Line of
Credit) dated as of October 2, 2002 (but effective on September 30, 2002), and
as further amended by that certain Fifth Amendment to Amended and Restated Loan
Agreement (Ex-Im Bank-Guaranteed Line of Credit) dated as of September 30, 2003
(collectively, the "AMENDED AND RESTATED LOAN AGREEMENT"). Borrower executed a
Seventh Amended and Restated Revolving Promissory Note dated effective on
September 30, 2003 made payable to the order of Lender in the original principal
amount of $2,000,000.00 (the "ORIGINAL NOTE").

      B. Borrower has requested that Lender amend the Amended and Restated Loan
Agreement and the Original Note to extend the maturity date of the Original Note
from November 30, 2003 to May 31, 2004 and to modify certain other terms
thereof. Lender is willing to make such changes subject to Guarantor giving
Lender the representations, assurances and other agreements hereinafter set
forth.

      C. Lender and Borrower shall execute (i) a Sixth Amendment to Amended and
Restated Loan Agreement (the "SIXTH AMENDMENT"); and (ii) a Eighth Amended and
Restated Revolving Promissory Note (the "EIGHTH AMENDED NOTE"). Guarantor and
CDC Acquisition Corp shall ratify their respective guaranties of the Note.

                                    AGREEMENT

      NOW, THEREFORE, for Ten Dollars ($10.00) and other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
because Guarantor will benefit from some of the changes to the Amended and
Restated Loan Agreement, Guarantor does hereby agree as follows:

      1. The Recitals hereinabove contained are true and correct and are made a
part hereof.

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      2. Guarantor acknowledges receipt of the Sixth Amendment and agrees,
ratifies and confirms that the Guaranty remains in full force and effect with
respect to (a) the Original Loan Agreement as amended and restated by the
Amended and Restated Loan Agreement as amended by the Sixth Amendment and (b)
the Eighth Amended Note.

      3. Guarantor represents and warrants unto Lender that (i) the Guaranty and
all other documents executed by Guarantor in connection therewith are valid and
binding obligations of Guarantor, enforceable in accordance with their terms;
(ii) the Eighth Amended Note shall continue to be guaranteed by the Guarantor
pursuant to the Guaranty; (iii) all of the terms, covenants, conditions,
representations, warranties and agreements contained in the Guaranty are hereby
ratified and confirmed in all respects; and (iii) no oral representations,
statements, or inducements have been made by Lender with respect to the Eighth
Amended Note, the Sixth Amendment, this Ratification or the Guaranty.

      IN WITNESS WHEREOF, the Guarantor has caused this Ratification to be
executed as of the day and year first above written.

                                            GUARANTOR:

                                            DREW SCIENTIFIC GROUP PLC

                                            BY: /s/ K.R. Drew
                                               ----------------------------
                                            Name: K.R. Drew
                                            Title: DIRECTOR

EFFECTIVE: November 30, 2003

EXECUTED this 8th day of December, 2003.

STATE OF Texas

COUNTY OF Dallas

      The foregoing was executed and acknowledged before me this 8th day of
December 2003 by Keith Drew, as Director of Drew Scientific Group PLC Such
person is personally known to me or produced _________ as identification and
did/did not take an oath.

[SEAL]                                  Katherine A Chavez
                                        Notary Public, State of Texas
                                        Print Name: Katherine A Chavez
                                        My Commission expires: 11-12-2006
                                        Commission No:___________________

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