Exhibit 10.13

THIS NOTE AND ANY SECURITIES ISSUABLE UPON THE CONVERSION HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT AS TO THE SECURITIES UNDER SAID ACT OR AN OPINION OF COUNSEL SATISFACTORY TO THE CORPORATION THAT SUCH REGISTRATION IS NOT REQUIRED.

BROWN TECHNICAL MEDIA CORP.

PROMISSORY NOTE

PN - 0 5

FOR VALUE RECEIVED, Brown Technical Media Corp. a Texas corporation (the "Company"), promises to pay to Delta S Ventures, LP ("Investor"), or its registered assigns, in lawful money of the United States of America the principal sum of $51,000 and No/100 Dollars ($51,000.00), or such lesser amount as shall equal the outstanding principal amount hereof, together with interest from the date of this Note on the unpaid principal balance at a rate equal to 9% per annum, compounded monthly, computed on the basis of the actual number of days elapsed and a year of 365 days, and payable in arrears on the Maturity Date, or otherwise upon repayment of the principal amount of this Note. All unpaid principal, together with any then unpaid and accrued interest and other amounts payable hereunder, shall be due and payable on September 11, 2015.

The following is a statement of the rights of Investor and the conditions to which this Note is subject, and to which Investor, by the acceptance of this Note, agrees:

1. Definitions. As used in this Note, the following capitalized terms have the following meanings:

(a)       The "Company" includes the corporation initially executing this Note and any Person which shall succeed to or assume the obligations of the Company under this Note.

(b)       "Event of Default" has the meaning given in Section 2 hereof.

(c)       "Investor" shall mean the Person specified in the introductory paragraph of this Note or any Person who shall at the time be the registered holder of this Note.

(d)       "Obligations" shall mean and include all loans, advances, debts, liabilities and obligations, howsoever arising, owed by the Company to Investor of every kind and description (whether or not evidenced by any note or instrument and whether or not for the payment of money), now existing or hereafter arising under or pursuant to the terms of this Note and the Purchase Agreement, including, all interest, fees, charges, expenses, attorneys' fees and costs and accountants' fees and costs chargeable to and payable by the Company hereunder and thereunder, in each case, whether direct or indirect, absolute or contingent, due or to become due, and whether or not arising after the commencement of a proceeding under Title 11 of the United States Code (11 U. S. C. Section 101 et seq.), as amended from time to time (including post-petition interest) and whether or not allowed or allowable as a claim in any such proceeding.

(e)       "Person" shall mean and include an individual, a partnership, a corporation (including a business trust), a joint stock company, a limited liability company, an unicorporated association, a joint venture or other entity of governmental authority.

(f)       "Securities Act" shall mean the Securities Act of 1933, as amended.

2.       Interest. Interest shall accrue at a rate equal to 9% per annum, compounded monthly, computed on the basis of the actual number of days elapsed and a year of 365 days, and payable in arrears on the Maturity Date and otherwise upon repayment of the principal of the Note.

3.       Prepayment. The Company may prepay this Note in whole or in part; provided that any such prepayment will be applied first to the payment of expenses due under this Note, second to interest accrued on this Note and third, if the amount of prepayment exceeds the amount of all such expenses and accrued interest, to the payment of principal of this Note.

4.       Events of Default. The occurrence of any of the following shall constitute an "Event of Default" under this Note and the other Transaction Documents:

(a)       Failure to Pay. The Company shall fail to pay (i) when due any principal or interest payment on the due date hereunder on this Note or any of the Notes issued pursuant to the Purchase Agreement or (ii) any other payment required under the terms of this Note, any of the Notes issued pursuant to the Purchase Agreement or any other Transaction Document on the date due and such payment shall not have been made within five days of the Company's receipt of Investor's written notice to the Company of such failure to pay;

(b)       Voluntary Bankruptcy or Insolvency Proceedings. The Company shall (i) apply for or consent to the appointment of a receiver, trustee, liquidator or custodian of itself or of all or a substantial part of its property, (ii) be unable, or admit in writing its inability, to pay its debts generally as they mature, (iii) make a general assignment for the benefit of its or any of its creditors, (iv) be dissolved or liquidated, (v) become insolvent (as such term may be defined or interpreted under any applicable statute), (vi) commence a voluntary case or other proceeding seeking liquidation, reorganization or other relief with respect to itself or its debts under any bankruptcy, insolvency or other similar law now or hereafter in effect or consent to any such relief or to the appointment of or taking possession of its property by any official in an involuntary case or other proceeding commenced against it, or (vii) take any action for the purpose of effecting any of the foregoing; or

(c)       Involuntary Bankruptcy or Insolvency Proceedings. Proceedings for the appointment of a receiver, trustee, liquidator or custodian of the Company or of all or a substantial part of the property thereof, or an involuntary case or other proceedings seeking liquidation, reorganization or other relief with respect to the Company or the debts thereof under any bankruptcy, insolvency or other similar law now or hereafter in effect shall be commenced and an order for relief entered or such proceeding shall not be dismissed or discharged within 30 days of commencement; or

5.       Rights of Investor upon Default. Upon the occurrence or existence of any Event of Default (other than an Event of Default described in Sections 4(b) or 4(c)) and at any time thereafter during the continuance of such Event of Default, Investor may, by written notice to the Company, declare all outstanding Obligations payable by the Company hereunder to be immediately due and payable without presentment, demand, protest or any other notice of any kind, all of which are hereby expressly waived. Upon the occurrence or existence of any Event of Default described in Sections 4(b) and 4(c), immediately and without notice, all outstanding Obligations payable by the Company hereunder shall automatically become immediately due and payable, without presentment, demand, protest or any other notice of any kind, all of which are hereby expressly waived. In addition to the foregoing remedies, upon the occurrence or existence of any Event of Default, Investor may exercise any other right, power or remedy granted to it by the Transaction Documents or otherwise permitted to it by law, either by suit in equity or by action at law, or both.

6.       Not Used

7.       Successors and Assigns. Subject to the restrictions on transfer described in Sections 8 and 9 below, the rights and obligations of the Company and Investor shall be binding upon and benefit the successors, assigns, heirs, administrators and transferees of the parties.

8.       Transfer of this Note or Securities Issuable on Conversion Hereof. With respect to any offer, sale or other disposition of this Note or securities into which such Note may be converted, Investor will give written notice to the Company prior thereto, describing briefly the manner thereof, together with a written opinion of Investor's counsel, or other evidence if reasonably satisfactory to the Company, to the effect that such offer, sale or other distribution may be effected without registration or qualification (under any federal or state law then in effect). Upon receiving such written notice and reasonably satisfactory opinion, if so requested, or other evidence, the Company, as promptly as practicable, shall notify Investor that Investor may sell or otherwise dispose of this Note or such securities, all in accordance with the terms of the notice delivered to the Company. If a determination has been made pursuant to this Section 10 that the opinion of counsel for Investor, or other evidence, is not reasonably satisfactory to the Company, the Company shall so notify Investor promptly after such determination has been made. Notwithstanding the foregoing, with respect to any offer, sale or other disposition of this Note or securities into which such Note may be converted to any person or entity affiliated with Investor (an "Affiliated Party"), Investor will give written notice to the Company prior thereto, describing briefly the manner thereof, and the Investor may transfer the Note to such Affiliated Party as long as the Affiliated Party agrees in writing to be bound by the terms hereof as if such Affiliated Party was the original Investor hereunder. Each Note thus transferred and each certificate representing the securities thus transferred shall bear a legend as to the applicable restrictions on transferability in order to ensure compliance with the Securities Act, unless in the opinion of counsel for the Company such legend is not required in order to ensure compliance with the Securities Act. The Company may issue stop transfer instructions to its transfer agent in connection with such restrictions. Subject to the foregoing, transfers of this Note shall be registered upon registration books maintained for such purpose by or on behalf of the Company. Prior to presentation of this Note for registration of transfer, the Company shall treat the registered holder hereof as the owner and holder of this Note for the purpose of receiving all payments of principal and interest hereon and for all other purposes whatsoever, whether or not this Note shall be overdue and the Company shall not be affected by notice to the contrary.

9.       Assignment by the Company. Neither this Note nor any of the rights, interests or obligations hereunder may be assigned, by operation of law or otherwise, in whole or in part, by the Company without the prior written consent of the holders of a Majority in Interest.

10.       Notices. All notices, requests, demands, consents, instructions or other communications required or permitted hereunder shall in writing and faxed, mailed or delivered to each party at the respective addresses of the parties as set forth in the Purchase Agreement, or at such other address or facsimile number as the Company shall have furnished to Investor in writing. All such notices and communications will be deemed effectively given the earlier of (i) when received, (ii) when delivered personally, (iii) one business day after being delivered by facsimile (with receipt of appropriate confirmation), (iv) one business day after being deposited with an overnight courier service of recognized standing or (v) four days after being deposited in the U.S. mail, first class with postage prepaid.

11.       Usury. In the event any interest is paid on this Note which is deemed to be in excess of the then legal maximum rate, then that portion of the interest payment representing an amount in excess of the then legal maximum rate shall be deemed a payment of principal and applied against the principal of this Note.

12.       Waivers. The Company hereby waives notice of default, presentment or demand for payment, protest or notice of nonpayment or dishonor and all other notices or demands relative to this instrument.

13.       Governing Law. This Note and all actions arising out of or in connection with this Note shall be governed by and construed in accordance with the laws of the State of Texas, without regard to the conflicts of law provisions of the State of Texas, or of any other state.

The Company has caused this Note to be issued as of the date first written above.