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                                                                   EXHIBIT 10(c)

                     MASTER REVOLVING NOTE
[COMERICA BANK LOGO] Eurodollar Rate-Maturity Date-Committed (Business and
                     Commercial Loans Only)

<TABLE>
<CAPTION>
AMOUNT            NOTE DATE         MATURITY DATE     TAX IDENTIFICATION NUMBER
<S>               <C>               <C>               <C>
$12,500,000       October 30, 2003  November 1, 2006  17507244170
</TABLE>

ON THE MATURITY DATE, as stated above, for value received, the undersigned
promise(s) to pay to the order of Comerica Bank ("Bank"), at any office of the
Bank in the State of Texas, Twelve Million Five Hundred Thousand Dollars (U.S.)
(or that portion of it advanced by the Bank and not repaid as later provided)
with interest until maturity, whether by acceleration or otherwise, or until the
occurrence of an Event of Default (as defined in that certain Credit Agreement
of even date herewith between the undersigned and Bank (the "Credit Agreement")
and used with the same meaning herein), at a per annum rate equal to the lesser
of (a) the Maximum Rate, as later defined, or (b) the Stated Rate, as later
defined, and after that at a rate equal to the rate of interest otherwise
prevailing under this Note plus three percent (3%) per annum (but in no event in
excess of the Maximum Rate). If on any day the Stated Rate shall exceed the
Maximum Rate for that day, the rate of interest applicable to this Note shall be
fixed at the Maximum Rate on that day and on each day thereafter until the total
amount of interest accrued on the unpaid principal balance of this Note equals
the total amount of interest which would have accrued if there had been no
Maximum Rate. Interest rate changes will be effective for interest computation
purposes as and when the Maximum Rate or the Stated Rate, as applicable,
changes. Subject to the limitations hereinbelow set forth, interest shall be
calculated on the basis of a 360-day year for actual number of days the
principal is outstanding. Accrued interest on this Note shall be payable on the
first Eurodollar Business Day, as later defined, of each calendar month,
commencing with the first Eurodollar Business Day of the calendar month
following the date of this Note and with respect to interest accrued on any
Eurodollar Balance, as later defined, on the last day of the applicable
Eurodollar Interest Period, as later defined, until the Maturity Date (set forth
above) when all amounts outstanding under this Note shall be due and payable in
full. If the frequency of interest payments is not otherwise specified, accrued
interest on this Note shall be payable monthly on the first day of each month.
If any payment of principal or interest under this Note shall be payable on a
day other than a day on which the Bank is open for business, this payment shall
be extended to the next succeeding business day and interest shall be payable at
the rate specified in this Note during this extension. A late payment charge
equal to a reasonable amount not to exceed five percent (5%) of each late
payment may be charged on any payment not received by the Bank within ten (10)
calendar days after the payment due date, but acceptance of payment of this
charge shall not waive any Event of Default under this Note.

Subject to the provisions hereof, the undersigned shall have the option (an
"Interest Option") exercisable from time to time to designate a portion of the
unpaid principal balance of this Note to bear interest at the Prime Rate (such
portion being herein referred to as the "Prime Rate Balance") and to designate
one or more portions of the unpaid principal balance of this Note to bear
interest at a Eurodollar Rate (each such portion being herein referred to as a
"Eurodollar Balance").

The term "Maximum Rate" as used herein, shall mean at the particular time in
question the maximum nonusurious rate of interest which, under applicable law,
may then be charged on this Note. If such maximum rate of interest changes after
the date hereof, the Maximum Rate shall be automatically increased or decreased,
as the case may be, without notice to the undersigned from time to time as of
the effective date of each change in such maximum rate. For purposes of
determining the Maximum Rate under the law of the State of Texas, the applicable
interest rate ceiling shall be the "weekly ceiling" from time to time in effect
under Chapter 303 of the Texas Finance Code, as amended.

The term "Stated Rate," as used in this Note, shall mean (a) with respect to the
Prime Rate Balance outstanding from time to time, a fluctuating per annum rate
of interest equal to the Prime Rate minus the Applicable Margin and (b) with
respect to each Eurodollar Balance, a per annum rate of interest equal to the
Eurodollar Rate for the Eurodollar Interest Period then in effect with respect
to such Eurodollar Balance plus the Applicable Margin.

The term "Prime Rate," as used herein, shall mean that annual rate of interest
which is equal to the greater of the annual rate of interest designated by the
Bank as its Prime Rate which is changed by the Bank from time to time or a
variable per annum rate of interest determined from day to day which equals the
sum of 1% plus the average per annum rate of interest on overnight Federal funds
transactions with members of Federal Reserve System arranged by Federal funds
brokers ("Overnight Transactions") transacted on the immediately preceding
Business Day, as published by the Federal Reserve Bank of New York, or, if such
interest rate is not so published for any Business Day, the average of the per
annum interest rate quotations for Overnight Transactions received by the Bank
(or, at its option, the Reference Bank) for such Business Day from 3 Federal
funds brokers of recognized standing selected by the Bank. The Bank's Prime Rate
is a reference rate and does not necessarily represent the lowest or best rate
actually charged by the Bank (or, at its option, the Reference Bank) to any of
its customers. The Bank may make commercial loans at rates of interest at, above
or below its Prime Rate.

The term "Eurodollar Rate", as used herein, shall mean, with respect to the
applicable Eurodollar Interest Period and applicable Eurodollar Balance (as
later defined), the quotient of the following (rounded upwards, if necessary, to
the nearest 1/16 of 1%): (a) the interest rate determined by the Bank (which
determination shall be conclusive) to be the per annum interest rate at which
deposits in immediately available funds in U.S. dollars are offered to the Bank
(or, if elected by the Bank, by Bank's designated eurodollar lending office) at
such time as the Bank elects on the first day of such Eurodollar Interest
Period, to prime banks in the interbank eurodollar market selected by Bank (or,
if applicable, by Bank's designated eurodollar lending office) for delivery on
the first day of such Eurodollar Interest Period in an amount equal to the
principal amount of the corresponding Eurodollar Balance for a period equal to
the length of such Eurodollar Interest Period; divided by (b) a percentage
(expressed as a decimal) equal to 1.00 minus the maximum rate during such
interest period at which Bank (or, if applicable, Bank's designated eurodollar
lending office) is required to maintain reserves on "Eurocurrency Liabilities"
as defined in and pursuant to Regulation D of the Board of Governors of the
Federal Reserve System or, if such regulation or designation is modified, and as
long as Bank (or, if applicable, Bank's designated eurodollar lending office) is
required to maintain reserves against a category of liabilities which includes
eurodollar deposits or includes a category of assets which includes eurodollar
loans, the rate at which such reserves are required to be maintained on such
category.

The term "Eurodollar Interest Period", as used herein, shall mean, with respect
to the applicable Eurodollar Balance, a period commencing on the date (which
must be a Eurodollar Business Day) upon which, pursuant to an Interest Notice,
as later defined, the principal amount of such Eurodollar Balance begins to
accrue interest at the applicable Eurodollar Rate (or, in the case of a rollover
to a successive Eurodollar Interest Period, the last day of the immediately
preceding Eurodollar Interest Period) and ending 30, 60, 90 or 180 days after

                                       1

<PAGE>

the commencement date (as designated in the Interest Notice); provided, that:
(i) any Eurodollar Interest Period which would otherwise end on a day which is
not a Eurodollar Business Day shall be extended to the next succeeding
Eurodollar Business Day (unless such Eurodollar Business Day falls in another
calendar month, in which case, such Eurodollar Interest Period shall end on the
next preceding Eurodollar Business Day); and (ii) any Eurodollar Interest Period
which begins on a day for which there is no numerically corresponding day in the
calendar month at the end of such Eurodollar Interest Period shall end on the
last Eurodollar Business Day of such last calendar month; and (iii) no
Eurodollar Interest Period shall extend beyond the Maturity Date.

The term "Eurodollar Business Day," as used herein, shall mean a Business Day on
which dealings in U.S. dollars are carried out in the interbank eurodollar
market selected by Bank (or, if applicable, Bank's designated eurodollar lending
office).

The term "Applicable Margin," as used herein, shall be determined in accordance
with the following schedule based on the Debt to Tangible Net Worth Ratio of the
undersigned, determined in accordance with the Credit Agreement:

<TABLE>
<CAPTION>
DEBT TO TANGIBLE NET WORTH RATIO             PRIME RATE BALANCE        EURODOLLAR BALANCE
--------------------------------             ------------------        ------------------
<S>                                          <C>                       <C>
Equal to or greater than 1.5:1                      0.25%                     2.25%

Less than 1.5:1 and greater than 1:1                0.50%                     2.00%

Less than or equal to 1:1                           0.75%                     1.75%
</TABLE>

Any decrease in Stated Rate due to a change in the Applicable Margin shall take
effect five (5) Business Days after the undersigned has submitted a Compliance
Certificate and Financial Statements in accordance with Section 4.3 of the
Credit Agreement to Bank demonstrating a Debt to Worth Ratio which would cause
such decrease; provided, no reduction in the Applicable Margin shall take effect
until Borrower shall have maintained a certain Debt to Worth Ratio giving rise
to such reduction for a consecutive three-month period. Any increase in the
Stated Rate resulting from an increase in the Applicable Margin due to a change
in the Debt to Worth Ratio shall take effect immediately upon the Bank's receipt
of a Compliance Certificate or Financial Statements (as defined in the Credit
Agreement) demonstrating a Debt to Worth Ratio which would cause such increase,
or in the event the Bank does not timely receive a Compliance Certificate and
all Financial Statements as required by the Credit Agreement or any other Loan
Document, as defined in the Credit Agreement, then the Applicable Margin shall
become 0.25% for the Prime Rate Balance and 2.25% for all Eurodollar Balances on
the earliest date on which delivery the Compliance Certificate and/or any
Financial Statement was due.

The term "Business Day" as used herein, shall mean any day other than a
Saturday, Sunday or holiday, on which the Bank and the Reference Bank (and, if
applicable, the Reference Bank's designated eurodollar lending office) are open
to carry on all or substantially all of their normal commercial lending business
in Dallas, Texas.

The Interest Option shall be exercisable by the undersigned subject to the other
limitations in this Note on the undersigned's option to designate a portion of
the unpaid principal balance hereof as a Eurodollar Balance and only in the
manner provided below:

         (i)      Before 12:00 noon at least 3 Business Days prior to the date
the undersigned has requested the Bank to make an advance upon this Note, the
undersigned shall have given the Bank written notice (any such notice, an
"Interest Notice") in form and content satisfactory to Bank specifying the
initial Interest Option(s) and the respective initial amounts of the Prime Rate
Balance and Eurodollar Balance designated by the undersigned for each advance.
If the required Interest Notice shall not have been timely received by the Bank
or fails to designate all or any portion of the unpaid principal amount of the
advance as either a Prime Rate Balance or a Eurodollar Balance in accordance
with the terms and provisions of this Note, the undersigned shall be deemed
conclusively to have designated such amounts to be a Prime Rate Balance and to
have given the Bank notice of such designation.

         (ii)     At least three (3) Business Days prior to the termination of
any Eurodollar Interest Period for a Eurodollar Balance, the undersigned shall
give the Bank an Interest Notice specifying the Interest Option which is to be
applicable to such Eurodollar Balance upon the expiration of such Eurodollar
Interest Period. If the required Interest Notice shall not have been timely
received by the Bank the undersigned shall be deemed conclusively to have
designated such amount as a Prime Rate Balance immediately upon the expiration
of such Eurodollar Interest Period and to have given the Bank notice of such
designation.

         (iii)    The undersigned shall have the right, exercisable on any
Business Day subject to the terms of this Note, to convert an eligible portion
of the Prime Rate Balance to a Eurodollar Balance by giving the Bank an Interest
Notice of such designation at least three (3) Eurodollar Business Days prior to
the effective date of such exercise. Additionally, upon termination of any
Eurodollar Interest Period, the undersigned shall have the right, on any
Business Day, to convert all or a portion of such principal amount from the
Eurodollar Balance to a Prime Rate Balance by giving Bank an Interest Notice of
such selection at least three (3) Eurodollar Business Days prior to effective
date of such exercise.

         (iv)     There may be no more than five (5) Eurodollar Balances in
effect at any time.

         (v)      Each Eurodollar Balance must be, as of the first day of the
applicable Eurodollar Interest Period, at least $100,000.

         (vi)     No Event of Default, or condition or event which, with the
giving of notice or the lapse of time, or both, would constitute an Event of
Default, shall have occurred and be continuing or exist.

         (vii)    Each exercise of an Interest Option to designate a Eurodollar
Balance to bear interest at a Stated Rate which is based on the Eurodollar Rate
shall not be revocable.

                                       2

<PAGE>

Changes in the Stated Rate applicable to a Prime Rate Balance or a Eurodollar
Balance shall become effective without prior notice to the undersigned
automatically as of the opening of business on the date of each change in the
Prime Rate or the Eurodollar Rate, as the case may be.

If the Bank (or, if applicable, Bank's designated eurodollar lending office)
determines that deposits in U.S. dollars (in the applicable amounts) are not
being offered to prime banks in the interbank eurodollar market selected by the
Bank (or if applicable, Bank's designated eurodollar lending office for the
applicable Eurodollar Interest Period, or that the rate at which such dollar
deposits are being offered will not adequately and fairly reflect the cost to
the Bank (or, if applicable, Bank's designated eurodollar lending office) of
making or maintaining a Eurodollar Balance for the applicable Eurodollar
Interest Period, the Bank shall forthwith give notice thereof to the
undersigned, whereupon, until the Bank notifies the undersigned that such
circumstances no longer exist, the right of the undersigned to select an
Interest Option based upon the Eurodollar Rate shall be suspended, and the
undersigned may only select Interest Options based on the Prime Rate.

If the adoption of any applicable law, rule or regulation, or any change
therein, or any change in the interpretation or administration thereof by any
governmental authority, central bank or comparable agency charged with the
interpretation or administration thereof, or compliance by the Bank (or, if
applicable, Bank's designated eurodollar lending office) with any request or
directive (whether or not having the force of law) of any such authority,
central bank or comparable agency shall make it unlawful or impractical for the
Bank (or, if applicable, Bank's designated eurodollar lending office) to make or
maintain a Eurodollar Balance, the Bank shall so notify the undersigned and any
then-existing Eurodollar Balance shall automatically convert to a Prime Rate
Balance either (i) on the last day of the then-current Eurodollar Interest
Period applicable to such Eurodollar Balance, if the Bank (and, if applicable,
its designated eurodollar lending office) may lawfully continue to maintain and
fund such Eurodollar Balance to such day, or (ii) immediately, if the Bank (or,
if applicable, its designated eurodollar lending office) may not lawfully
continue to maintain such Eurodollar Balance to such day. Further, until Bank
notices the undersigned that such conditions or circumstances no longer exist,
the right of the undersigned to select an Interest Option based on the
Eurodollar Rate shall be suspended, and the undersigned may only select Interest
Options based on the Prime Rate.

If either (i) the adoption of any applicable law, rule or regulation, or any
change therein, or any change in the interpretation or administration thereof by
any governmental authority, central bank or comparable agency charged with the
interpretation or administration thereof, or compliance by the Bank (or, if
applicable, its designated eurodollar lending office) with any request or
directive (whether or not having the force of law) of any such authority,
central bank or comparable agency shall subject the Bank (or, if applicable, its
designated eurodollar lending office) to any tax (including without limitation
any United States interest equalization or similar tax, however named), duty or
other charge with respect to any Eurodollar Balance, this Note or the Bank's
(or, if applicable, its designated eurodollar lending office) obligation to
compute interest on the principal balance of this Note at a rate based upon the
Eurodollar Rate, or shall change the basis of taxation of payments to the Bank
(or, if applicable, its designated eurodollar lending office) of the principal
of or interest on any Eurodollar Balance or any other amounts due under this
Note in respect of any Eurodollar Balance or the Bank's (or, if applicable, its
designated eurodollar lending office) obligation to compute the interest on the
balance of this Note at a rate based upon the Eurodollar Rate, or (ii) any
governmental authority, central bank or other comparable authority shall at any
time impose, modify or deem applicable any reserve (including, without
limitation, any imposed by the Board of Governors of the Federal Reserve
System), special deposit or similar requirement against assets of, deposits with
or for the account of, or credit extended by, the Bank (or, if applicable, its
designated eurodollar lending office), or shall impose on the Bank (or, if
applicable, its designated eurodollar lending office) or any relevant interbank
eurodollar market or exchange any other condition affecting any Eurodollar
Balance, this Note or the Bank's (or, if applicable, its designated eurodollar
lending office) obligation to compute the interest on the balance of this Note
at a rate based upon the Eurodollar Rate; and the result of any of the foregoing
is to increase the cost to the Bank (or, if applicable, its designated
eurodollar lending office) of maintaining any Eurodollar Balance, or to reduce
the amount of any sum received or receivable by the Bank (or, if applicable,
Bank's designated eurodollar lending office) under this Note by an amount deemed
by the Bank to be material, then upon demand by the Bank in writing, accompanied
by reasonable detail and explanation, the undersigned shall pay to the Bank such
additional amount or amounts as will compensate the Bank (or, if applicable,
Bank's designated eurodollar lending office) for such increased cost or
reduction. The Bank will promptly notify the undersigned of any event of which
it has knowledge, occurring after the date hereof, which will entitle the Bank
(or, if applicable, Bank's designated eurodollar lending office) to compensation
pursuant to this paragraph. A certificate of the Bank claiming compensation
under this paragraph and setting forth the additional amount or amounts to be
paid to the Bank hereunder shall be conclusive in the absence of manifest error.

If any applicable law, treaty, rule, or regulation (whether domestic or foreign)
now or hereafter in effect and whether presently applicable to the Bank (or, if
applicable, its designated eurodollar lending office) or any change therein or
any interpretation or administration thereof by any governmental authority,
central bank or comparable agency charged with the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof or compliance
by the Bank (or, if applicable, its designated eurodollar lending office)
therewith or with any guidance, request or directive of any such governmental
authority, central bank or comparable agency (whether or not having the force of
law), including any risk-based capital guidelines, affects or would affect the
amount of capital required or expected to be maintained by the Bank (or any
corporation controlling the Bank), and the Bank determines that the amount of
such capital is increased by or based upon the existence of any obligations of
Bank hereunder or the maintaining of any Eurodollar Balance hereunder, and such
increase has the effect of reducing the rate of return on Bank's (or its
controlling corporation's) capital as a consequence of such obligations or the
maintaining of Eurodollar Balances hereunder to a level below that which the
Bank (or such controlling corporation) could have achieved but for such
circumstances (taking into consideration its policies with respect to capital
adequacy), then the undersigned shall pay to Bank, within fifteen (15) days of
receipt by the undersigned of written notice from the Bank demanding such
compensation and detailing the calculation thereof, such additional amounts as
are sufficient to compensate the Bank (and its controlling corporation) for any
increase in the amount of capital and reduced rate of return which the Bank
determines to be allocable to the existence of any obligations of the Bank (or
its controlling corporation) hereunder or maintenance of any Eurodollar Balances
hereunder. A certificate of Bank as to the amount of such compensation and the
calculation thereof, prepared in good faith and in reasonable detail by the
Bank, which is submitted by the Bank to the undersigned shall be conclusive and
binding for all purposes absent manifest error.

The undersigned may not repay any Eurodollar Balance or convert all or any
portion of a Eurodollar Balance to a Prime Rate Balance prior to the expiration
of the applicable Eurodollar Interest Period, unless (i) such repayment or
conversion is specifically required by the terms of this Note, (ii) the Bank
demands that such repayment or conversion be made, or (iii) the Bank, in its
sole discretion, consents to such repayment or conversion. If for any reason,
whether or not consent shall have been given or demand shall have been made by
the Bank, any Eurodollar

                                       3

<PAGE>

Balance is repaid or converted prior to the expiration of the corresponding
Eurodollar Interest Period, or any Interest Option which designates a Eurodollar
Balance is revoked for any reason whatsoever prior to the commencement of the
applicable Eurodollar Interest Period or the undersigned fails for any reason to
borrow the full amount of any Eurodollar Balance for which the undersigned has
exercised an Interest Option, or if for any other reason whatsoever, the basis
for determining the Stated Rate shall be changed from a Eurodollar Rate to the
Prime Rate prior to the expiration of the applicable Eurodollar Interest Period,
or the undersigned shall fail to make any payment of principal or interest upon
this Note at any time that the Stated Rate if based on a Eurodollar Rate, then
the undersigned shall pay to the Bank on demand any amounts required to
compensate the Bank (and, if applicable, its designated eurodollar lending
office) for any losses, costs or expenses which it may incur as a result
thereof, including, without limitation, any loss, cost or expense incurred in
obtaining, liquidating, employing or redeploying deposits from third parties.
Amounts payable by the undersigned to the Bank pursuant to this paragraph may
include, without limitation, amounts equal to the excess, if any of (a) the
amounts of interest which would have accrued on any amounts so prepaid,
refunded, converted or not so borrowed, from the respective dates of prepayment,
refund, conversion or failure to borrow through the last day of the relevant
Eurodollar Interest Periods at the applicable rates of interest for the
applicable Eurodollar Balances, as provided under this Note, over (b) the
amounts of interest determined by the Bank (or, if applicable, its designated
eurodollar lending office) which would have accrued to the Bank or Reference
Bank (or, if applicable, its designated eurodollar lending office) on such
respective amounts by placing such amounts on deposit for comparable periods
with leading banks in the interbank eurodollar market selected by the Bank (or,
if applicable, its designated eurodollar lending office). The calculation of any
such amounts under this paragraph shall be made as if the Bank (or, if
applicable, its designated eurodollar lending office) actually funded or
committed to fund the relevant Eurodollar Balances hereunder through the
purchase of underlying deposits in amounts equal to the respective amounts of
the applicable Eurodollar Balances and having terms comparable to the applicable
Eurodollar Interest Periods; provided, however, that the Bank (or, if
applicable, its designated eurodollar lending office) may fund Eurodollar
Balances hereunder in any manner they may elect in their sole discretion, and
the foregoing assumptions shall be utilized only for the purposes of calculating
amounts payable under this paragraph. Upon written request by the undersigned,
the Bank shall deliver to the undersigned a certificate setting for the basis
for determining such losses, costs and expenses which certificate shall be
conclusive in the absence of manifest error.

For any Eurodollar Balance, if the Bank shall designate a eurodollar lending
office which maintains books separate from those of the Bank, the Bank shall
have the option of maintaining and carrying such Eurodollar Balance on the Books
of such eurodollar lending office.

The principal amount payable under this Note shall be the sum of all advances
made by the Bank to or at the request of the undersigned, as provided in the
Credit Agreement less principal payments actually received by the Bank. The
books and records of the Bank shall be the best evidence of the principal amount
and the unpaid interest amount owing at any time under this Note and shall be
conclusive absent manifest error. No interest shall accrue under this Note until
the date of the first advance made by the Bank; after that interest on all
advances shall accrue and be computed on the principal balance outstanding from
time to time under this Note until the same is paid in full.

This Note and any other indebtedness and liabilities of any kind of the
undersigned (or any of them) to the Bank, and any and all modifications,
renewals or extensions of it, whether joint or several, contingent or absolute,
now existing or later arising, and however evidenced and whether incurred
voluntarily or involuntarily, known or unknown, or originally payable to the
Bank or to a third party and subsequently acquired by Bank including, without
limitation, any late charges; loan fees or charges; overdraft indebtedness;
costs incurred by Bank in establishing, determining, continuing or defending the
validity or priority of any security interest, pledge or other lien or in
pursuing any of its rights or remedies under any loan document (or otherwise) or
in connection with any proceeding involving the Bank as a result of any
financial accommodation to the undersigned (or any of them); and reasonable
costs and expenses of attorneys and paralegals, whether inside or outside
counsel is used, and whether any suit or other action is instituted, and to
court costs if suit or action is instituted, and whether any such fees, costs or
expenses are incurred at the trial court level or on appeal, in bankruptcy, in
administrative proceedings, in probate proceedings or otherwise (collectively
"Indebtedness"), are secured by and the Bank is granted a security interest in
and lien upon all items deposited in any account of any of the undersigned with
the Bank and by all proceeds of these items (cash or otherwise), all account
balances of any of the undersigned from time to time with the Bank, by all
property of any of the undersigned from time to time in the possession of the
Bank and by any other collateral, rights and properties described in each and
every deed of trust, mortgage, security agreement, pledge, assignment and other
security or collateral agreement which has been, or will at any time(s) later
be, executed by any (or all) of the undersigned to or for the benefit of the
Bank (collectively "Collateral").

Upon the occurrence of an Event of Default, the Bank may, at its option and
without prior notice to the undersigned (or any of them), declare any or all of
the Indebtedness to be immediately due and payable (notwithstanding any
provisions contained in the evidence of it to the contrary), cease advancing
money or extending credit to or for the benefit of the undersigned under this
Note or any other agreement between the undersigned and Bank, terminate this
Note as to any future liability or obligation of Bank, but without affecting
Bank's rights and security interests in any Collateral or the Indebtedness, sell
or liquidate all or any portion of the Collateral, set off against the
Indebtedness any amounts owing by the Bank to the undersigned (or any of them),
charge interest at the default rate provided in the Credit Agreement and
exercise any one or more of the rights and remedies granted to the Bank by any
agreement with the undersigned (or any of them) or given to it under applicable
law. All payments under this Note shall be in immediately available United
States funds, without setoff or counterclaim.

This Note shall bind the undersigned and its personal representatives,
successors and assigns.

The undersigned waive(s) presentment, demand, protest, notice of dishonor,
notice of demand or intent to demand, notice of acceleration or intent to
accelerate, and all other notices, except as set forth in the Credit Agreement,
and agree(s) that no extension or indulgence to the undersigned (or any of them)
or release, substitution or nonenforcement of any security, or release or
substitution of any of the undersigned, any guarantor or any other party,
whether with or without notice, shall affect the obligations of any of the
undersigned. The undersigned waive(s) all defenses or right to discharge
available under Section 3.605 of the Texas Uniform Commercial Code and waive(s)
all other suretyship defenses or right to discharge. The undersigned agree(s)
that the Bank has the right to sell, assign, or grant participations or any
interest in, any or all of the Indebtedness, as provided in the Credit
Agreement, and that, in connection with this right, but without limiting its
ability to make other disclosures to the full extent allowable, the Bank may
disclose all documents and information which the Bank now or later has relating
to the undersigned or the Indebtedness. The undersigned agree(s) that the Bank
may provide

                                       4

<PAGE>

information relating to this Note or the Indebtedness or relating to the
undersigned to the Bank's parent, affiliates, subsidiaries and service
providers.

The undersigned agree(s) to reimburse the holder or owner of this Note upon
demand for any and all costs and expenses (including without limit, court costs,
legal expenses and reasonable attorneys' fees, whether inside or outside counsel
is used, and whether or not suit is instituted and, if suit is instituted,
whether at the trial court level, appellate level, in a bankruptcy or
administrative proceeding or otherwise) incurred in collecting or attempting to
collect this Note or incurred in any other matter or proceeding relating to this
Note.

The undersigned acknowledge(s) and agree(s) that there are no contrary
agreements, oral or written, establishing a term of this Note and agree(s) that
the terms and conditions of this Note may not be amended, waived or modified
except in a writing signed by an officer of the Bank expressly stating that the
writing constitutes an amendment, waiver or modification of the terms of this
Note. As used in this Note, the word "undersigned" means, individually and
collectively, each maker, accommodation party, indorser and other party signing
this Note in a similar capacity. If any provision of this Note is unenforceable
in whole or part for any reason, the remaining provisions shall continue to be
effective. Chapter 346 of the Texas Finance Code (and as the same may be
incorporated by reference in other Texas statutes) shall not apply to the
Indebtedness evidenced by this Note. THIS NOTE IS MADE IN THE STATE OF TEXAS AND
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE
STATE OF TEXAS, WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLE.

This Note and all other documents, instruments and agreements evidencing,
governing, securing, guaranteeing or otherwise relating to or executed pursuant
to or in connection with this Note or the Indebtedness evidenced hereby (whether
executed and delivered prior to, concurrently with or subsequent to this Note),
as such documents may have been or may hereafter be amended from time to time
(the "Loan Documents") are intended to be performed in accordance with, and only
to the extent permitted by, all applicable usury laws. If any provision hereof
or of any of the other Loan Documents or the application thereof to any person
or circumstance shall, for any reason and to any extent, be invalid or
unenforceable, neither the application of such provision to any other person or
circumstance nor the remainder of the instrument in which such provision is
contained shall be affected thereby and shall be enforced to the greatest extent
permitted by law. It is expressly stipulated and agreed to be the intent of the
holder hereof to at all times comply with the usury and other applicable laws
now or hereafter governing the interest payable on the indebtedness evidenced by
this Note. If the applicable law is ever revised, repealed or judicially
interpreted so as to render usurious any amount called for under this Note or
under any of the other Loan Documents, or contracted for, charged, taken,
reserved or received with respect to the indebtedness evidenced by this Note, or
if Bank's exercise of the option to accelerate the maturity of this Note, or if
any prepayment by the undersigned or prepayment agreement results (or would, if
complied with, result) in the undersigned having paid, contracted for or being
charged for any interest in excess of that permitted by law, then it is the
express intent of the undersigned and Bank that this Note and the other Loan
Documents shall be limited to the extent necessary to prevent such result and
all excess amounts theretofore collected by Bank shall be credited on the
principal balance of this Note or, if fully paid, upon such other Indebtedness
as shall then remaining outstanding (or, if this Note and all other Indebtedness
have been paid in full, refunded to the undersigned), and the provisions of this
Note and the other Loan Documents shall immediately be deemed reformed and the
amounts thereafter collectable hereunder and thereunder reduced, without the
necessity of the execution of any new document, so as to comply with the then
applicable law, but so as to permit the recovery of the fullest amount otherwise
called for hereunder or thereunder. All sums paid, or agreed to be paid, by the
undersigned for the use, forbearance, detention, taking, charging, receiving or
reserving of the indebtedness of the undersigned to Bank under this Note or
arising under or pursuant to the other Loan Documents shall, to the maximum
extent permitted by applicable law, be amortized, prorated, allocated and spread
throughout the full term of such indebtedness until payment in full so that the
rate or amount of interest on account of such indebtedness does not exceed the
usury ceiling from time to time in effect and applicable to such indebtedness
for so long as such indebtedness is outstanding. To the extent federal law
permits Bank to contract for, charge or receive a greater amount of interest,
Bank will rely on federal law instead of the Texas Finance Code for the purpose
of determining the Maximum Rate. Additionally, to the maximum extent permitted
by applicable law now or hereafter in effect, Bank may, at its option and from
time to time, implement any other method of computing the Maximum Rate under the
Texas Finance Code or under other applicable law, by giving notice, if required,
to the undersigned as provided by applicable law now or hereafter in effect.
Notwithstanding anything to the contrary contained herein or in any of the other
Loan Documents, it is not the intention of Bank to accelerate the maturity of
any interest that has not accrued at the time of such acceleration or to collect
unearned interest at the time of such acceleration.

THE UNDERSIGNED AND THE BANK, BY ACCEPTANCE OF THIS NOTE, ACKNOWLEDGE THAT THE
RIGHT TO TRIAL BY JURY IS A CONSTITUTIONAL ONE, BUT THAT IT MAY BE WAIVED. EACH
PARTY, AFTER CONSULTING (OR HAVING HAD THE OPPORTUNITY TO CONSULT) WITH COUNSEL
OF THEIR CHOICE, KNOWINGLY AND VOLUNTARILY, AND FOR THEIR MUTUAL BENEFIT, WAIVES
ANY RIGHT TO TRIAL BY JURY IN THE EVENT OF LITIGATION REGARDING THE PERFORMANCE
OR ENFORCEMENT OF, OR IN ANY WAY RELATED TO, THIS NOTE OR THE INDEBTEDNESS.

THIS WRITTEN LOAN AGREEMENT (AS DEFINED BY SECTION 26.02 OF THE TEXAS BUSINESS
AND COMMERCE CODE) 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.

PEERLESS MFG. CO.                            By: /s/ Richard L. Travis, Jr.
                                                 -------------------------------
                                                 RICHARD L. TRAVIS, JR.
                                                 CHIEF FINANCIAL OFFICER

2819 Walnut Hill Lane,            Dallas             Texas              75229
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STREET ADDRESS                     CITY              STATE             ZIP CODE

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<PAGE>

               FOR BANK USE ONLY                        CCAR #
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LOAN OFFICER INITIALS   LOAN GROUP NAME   OBLIGOR NAME

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LOAN OFFICER ID. NO.    LOAN GROUP NO.    OBLIGOR NO.   NOTE NO.   AMOUNT

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