Document:

First Amendment to Lease

 Exhibit 10.1 
  
 FIRST AMENDMENT TO LEASE 
  
 THIS FIRST AMENDMENT TO LEASE (this “Amendment”), dated for reference purposes only as of
December 22, 2005, is by and between CARRAMERICA REALTY OPERATING PARTNERSHIP, L.P., a Delaware limited partnership (“Landlord”), and PORTALPLAYER, INC., a Delaware corporation (“Tenant”). 
  
 RECITALS 
  
 A. Landlord and Tenant are parties to that certain lease dated as of
April 6, 2005 (the “Existing Lease”) for certain premises (the “Original Premises”) consisting of approximately 39,301 rentable square feet in the building commonly known as 70 Plumeria Drive & 2720
Orchard Parkway, San Jose, California (the “Building”). The Existing Lease is scheduled to terminate on September 30, 2010. 
  
 B. The parties desire to amend the Existing Lease to (i) provide for the amount of Base Rent for the Original Premises that is payable for the
calendar month ending on September 30, 2010, (ii) expand the leased premises to include the remainder of the Building, which is commonly known as 2720 Orchard Parkway, and contains approximately 40,490 rentable square feet (the
“Expansion Space”), as more particularly shown on Exhibit A attached hereto, and (iii) make certain other amendments to the Existing Lease, all subject to, and on the basis of, the terms, covenants and conditions
hereinafter set forth. The Existing Lease, as amended by this Amendment, is sometimes hereafter referred to as the “Lease.” 
  
 AGREEMENT 
  
 NOW, THEREFORE, for good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereby mutually
promise, covenant and agree as follows: 
  
 1. Incorporation
of Recitals and Definitions; Effective Date. Unless clearly inconsistent or unless the context clearly requires otherwise, capitalized terms used in this Amendment not otherwise defined herein shall have the meanings given such terms in the
Existing Lease. The Recitals are hereby incorporated herein by this reference. Unless otherwise specifically provided herein, all provisions of this Amendment shall be effective as of the date of execution set forth under Landlord’s signature
below. 
  
 2. Commencement Date for Expansion Space. The
“Expansion Space Commencement Date” shall be December 26, 2005; provided, however, that if Landlord is unable to provide Tenant with access to the Expansion Space on or before December 26, 2005, for any reason, then
(a) this Amendment shall not be void or voidable by either party, (b) Landlord shall not be liable to Tenant for any loss or damage resulting therefrom, and (c) the Expansion Space Commencement Date shall be revised to mean the date
on which Landlord can provide Tenant with access to Expansion Space. If the Expansion Space Commencement Date is adjusted pursuant to the foregoing, then Tenant, at Landlord’s request, shall execute a 
  

 1 

 Commencement Date Confirmation that sets forth the Expansion Space Commencement Date. As of the Expansion Space
Commencement Date, all terms and provisions of the Lease shall be applicable to the Expansion Space. 
  
 3. Term. The Term of the Lease with respect to the Expansion Space shall commence on the Expansion Space Commencement Date and terminate on
September 30, 2010 (i.e., the Termination Date under the Existing Lease), unless the Lease is extended or earlier terminated pursuant to the terms and conditions thereof, including, without limitation, Section 32 of the Existing
Lease, and subject to Section 8 below. 
  
 4. Amendments
to Existing Lease. Effective as of the Expansion Space Commencement Date, the Existing Lease shall be amended as follows: 
  
 (a) Premises. Section 2 of the Schedule shall be deleted in its entirety and replaced by the following: 
  

	 	“2.	Premises: 70 Plumeria Drive, as outlined on Exhibit A attached hereto, and 2720 Orchard Parkway, as outlined on Exhibit A attached to the First Amendment to
Lease” 

  
 (b) Rentable Square Footage of
the Premises. Section 4 of the Schedule shall be deleted in its entirety and replaced by the following: 
  

	 	“4.	Rentable Square Footage of the Premises: Approximately 79,791 rentable square feet (consisting of approximately 39,301 rentable square feet in 70 Plumeria Drive, and
approximately 40,490 rentable square feet in 2720 Orchard Parkway)” 

  
 (c) Tenant’s Proportionate Share. Section 5 of the Schedule shall be deleted in its entirety and replaced by the following: 
  

	 	“5.	Tenant’s Proportionate Share: 71.81% (calculated based on a premises of 57,301 rentable square feet)” 

  
 (d) Parking Stalls. Section 13 of the Schedule shall be deleted
in its entirety and replaced by the following: 
  

	 	“13.	Parking Stalls: Two Hundred One (201) unassigned stalls” 

  

 2 

 (e) Base Rent. Section 14 of the Schedule (Base Rent) to the Existing Lease contains an
omission, in that it fails to address the amount of Base Rent payable for the month of September 2010. Accordingly, the parties hereby agree that the amount of Base Rent payable by Tenant for the month of September 2010 equals Thirty-Seven Thousand
Three Hundred Thirty-Five and 95/100 Dollars ($37,335.95). In addition to the Base Rent payable by Tenant for the Original Premises, Tenant shall pay to Landlord Base Rent for the Expansion Space in accordance with the following: 
  

				
	 PERIOD

	  	MONTHLY BASE RENT FOR
EXPANSION
SPACE

	 December 26, 2005 – February 28, 2006
	  	$	0.00
	 March 1, 2006 – December 31, 2006
	  	$	7,200.00
	 January 1, 2007 – December 31, 2007
	  	$	8,100.00
	 January 1, 2008 – December 31, 2008
	  	$	9,000.00
	 January 1, 2009 – December 31, 2009
	  	$	9,900.00
	 January 1, 2010 – September 30, 2010
	  	$	10,800.00

  
 Therefore, the total
amount of Base Rent payable by Tenant for the Premises shall be as follows: 
  

										
	 PERIOD

	  	MONTHLY BASE
RENT FOR ORIGINAL
PREMISES

	  	MONTHLY BASE
RENT
FOR
EXPANSION
SPACE

	  	MONTHLY BASE RENT
FOR ENTIRE PREMISES

	 5/1/05 – 9/30/05
	  	$	0.00	  	$	0.00	  	$	0.00
	 10/1/05 – 2/28/06
	  	$	24,900.00	  	$	0.00	  	$	24,900.00
	 3/1/06 – 4/30/06
	  	$	24,900.00	  	$	7,200.00	  	$	32,100.00
	 5/1/06 – 12/31/06
	  	$	28,104.28	  	$	7,200.00	  	$	35,304.28
	 1/1/07 – 4/30/07
	  	$	28,104.28	  	$	8,100.00	  	$	36,204.28
	 5/1/07 – 12/31/07
	  	$	29,004.28	  	$	8,100.00	  	$	37,104.28
	 1/1/08 – 4/30/08
	  	$	29,004.28	  	$	9,000.00	  	$	38,004.28
	 5/1/08 – 12/31/08
	  	$	36,156.92	  	$	9,000.00	  	$	45,156.92

  

 3 

										
	 PERIOD

	  	MONTHLY BASE
RENT FOR ORIGINAL
PREMISES

	  	MONTHLY BASE
RENT
FOR
EXPANSION
SPACE

	  	MONTHLY BASE RENT
FOR ENTIRE PREMISES

	 1/1/09 – 4/30/09
	  	$	36,156.92	  	$	9,900.00	  	$	46,056.92
	 5/1/09 – 12/31/09
	  	$	37,335.95	  	$	9,900.00	  	$	47,235.95
	 1/1/10 – 9/30/10
	  	$	37,335.95	  	$	10,800.00	  	$	48,135.95

  
 5. Rent
Abatement. Tenant acknowledges and agrees that the rent abatement granted with respect to the Expansion Space for the period beginning on December 26, 2005, and ending on February 28, 2006, is subject to Section 2.7 of the
Existing Lease, and that the amount of such rent abatement shall constitute an Inducement for purposes of said Section 2.7. 
  
 6. Condition of Expansion Space. Landlord is leasing the Expansion Space to Tenant “as is”, without any obligation to alter, remodel,
improve, repair or decorate any part of the Expansion Space and without any express or implied representations or warranties of any kind, including, without limitation, any representation or warranty regarding the condition of the Expansion Space,
the Building or the Project or the suitability of any of the foregoing for the conduct of Tenant’s business. Tenant’s taking possession of any portion of the Expansion Space shall be conclusive evidence that the Expansion Space was in good
order, repair and condition. 
  
 7. Use of the Expansion Space;
Subletting; Alterations. 
  
 (a) Use. Tenant shall use
the Expansion Space only for the Permitted Use described in Section 7 of the Schedule, and shall not use or permit the Expansion Space to be used for any other purpose or purposes whatsoever. Landlord and Landlord’s agents have made no
representations or promises with respect to the Expansion Space or this Amendment, except as expressly set forth herein, and Tenant acknowledges and agrees that the Expansion Space is suited for the use intended by Tenant. Tenant represents and
warrants to Landlord that prior to executing this Amendment, Tenant made such investigations as it deemed appropriate with respect to the suitability of the Expansion Space for its intended use, and determined that the same is suitable for such
intended use. 
  
 (b) Subletting and Alterations.
Notwithstanding the provisions of Section 5 and Section 17 of the Existing Lease, in no event shall Tenant have any right to (i) sublease or otherwise Transfer the portion of the Expansion Space identified on Exhibit A as the
“Possible Recapture Space”, or (ii) make any Alterations, including any Minor Alterations, in or to the “Possible Recapture Space”, without, in each case, Landlord’s prior written consent, which consent may be granted
or withheld in Landlord’s sole and absolute discretion. 
  
 8. Reduction or Modification of Expansion Space. 
  
 (a) Landlord’s Right; Tenant’s Surrender of Portion of Expansion Space. 
  

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 Landlord shall have the right, upon at least thirty (30) days’ prior notice to Tenant, to reduce the size of,
or otherwise modify, the Expansion Space. In accordance with Landlord’s right under this Section 8, Tenant acknowledges that Landlord may, at any time before the Termination Date, and from time to time, require Tenant to surrender to
Landlord and vacate the Possible Recapture Space or such other portion of the Expansion Space as may be mutually agreed upon by Landlord and Tenant (the “Deletion Premises”). The portion of the Expansion Space that Tenant will
continue to occupy upon surrender of the Deletion Premises is referred to as the “Remaining Space.” Promptly following Tenant’s receipt of Landlord’s notice to vacate (the “Vacation Notice”), Tenant shall
conduct a walk-through inspection of the Deletion Premises with Landlord, during which Landlord shall prepare a list of items, if any, to be completed by Tenant in order for the Deletion Premises to be surrendered in accordance with Section 14
of the Existing Lease (the “Punch List Items”). If at the time Tenant receives the Vacation Notice, and all or a portion of the Deletion Premises are then in use by Tenant as office space, Landlord shall, on or before the Surrender
Date, at Landlord’s expense, perform such work as may be agreed upon by Landlord and Tenant, such as any needed roof repair, carpet cleaning and repair and/or maintenance of the heating, ventilation and air conditioning system, so that an equal
portion of the base building of the Remaining Space may be tenantable for like office use (the “Replacement Office Space”). Provided Landlord has so prepared the Replacement Office Space, on or prior to the date Tenant is required
to surrender possession of the Deletion Premises to Landlord (the “Surrender Date”), Tenant shall, at its sole cost and expense, surrender to Landlord possession of the Deletion Premises in the manner required under said
Section 14, including the completion of all Punch List Items to the reasonable satisfaction of Landlord, and conduct a final inspection of the Deletion Premises with Landlord to verify the satisfactory completion of the Punch List Items. If
Tenant fails to surrender the Deletion Premises and to complete the Punch List Items to Landlord’s reasonable satisfaction on or prior to the Surrender Date, then (i) Landlord may complete the Punch List Items on Tenant’s behalf and
Tenant shall remit payment to Landlord for such completion, as Additional Rent under the Lease, within ten (10) days following Tenant’s receipt of Landlord’s invoice for the cost of such completion; and (ii) such failure shall
constitute a “holding over” in the Deletion Premises without Landlord’s consent, in which event the provisions of Section 15 of the Existing Lease shall apply. 
  
 (b) Definition of Premises. As of 11:59 p.m. on the Surrender Date, the Lease shall terminate with respect to the
Deletion Premises and, for all purposes under the Lease, the “Premises” shall be comprised solely of the Original Premises and the Remaining Space. At Landlord’s request, Tenant shall execute an amendment to the Lease to reflect the
termination of the Lease with respect to the Deletion Space; provided, however, that Tenant agrees that Sections 13 (Parking) and 14 (Base Rent) of the Schedule, as amended hereby, shall not be modified as a result of such termination. By way
of example, and without limiting the generality of the foregoing, Tenant shall continue to pay the Base Rent for the Remaining Space in the amount payable with respect to the Expansion Space as set forth in Section 5(e) above, without
adjustment for the reduction of the size of the Expansion Space. 
  
 (c) Preparation for Reoccupancy; Demising Work. Tenant acknowledges and agrees that Landlord may enter the Expansion Space at any time after the date of this Amendment to show the Expansion Space to prospective tenants and to
decorate, remodel, repair, alter or otherwise prepare the Expansion Space for reoccupancy (the “Renovations”). As part of the Renovations, Landlord may separate the Deletion Premises from the Remaining Space 
  

 5 

 by constructing a new demising wall to separate the Remaining Space from the Deletion Premises, and constructing such
other improvements as shall be required by Governmental Requirements or as Landlord shall deem necessary or appropriate in order to demise the Remaining Space (the “Demising Work”). 
  
 (d) Landlord’s Work. Tenant acknowledges and agrees that the
Demising Work and the Renovations (collectively, the “Work”), may be conducted during normal business hours and may create disruption, noise, dust or temporarily leave debris in the Premises. Tenant hereby agrees that such Work and
Landlord’s actions in connection with such Work shall in no way constitute a constructive eviction of Tenant nor entitle Tenant to any abatement of rent. Landlord shall have no responsibility or for any reason be liable to Tenant for any direct
or indirect injury to or interference with Tenant’s business arising from the Work, nor shall Tenant be entitled to any compensation or damages from Landlord for loss of the use of the whole or any part of the Premises or of Tenant’s
personal property or improvements resulting from the Work or Landlord’s actions in connection with such Work, or for any inconvenience or annoyance occasioned by such Work or Landlord’s actions. 
  
 (e) Tenant’s Representations. Tenant represents and warrants to
Landlord that, in surrendering the Deletion Premises to Landlord, all rights of Tenant thereto and any sublessees or other parties that may have been entitled to occupy all or any portion of the Deletion Premises through or under Tenant shall be
terminated as of the Surrender Date, and Tenant shall surrender the Deletion Premises to Landlord free of any rights of occupancy created or granted by Tenant. 
  

9. Tenant’s Certification. 
  
 (a) Tenant represents and warrants to Landlord that (i) it has not assigned, encumbered or otherwise transferred the Lease or any interest under the
Lease or any claim, obligation, action or cause of action arising from the Lease, or sublet all or any part of the Premises; (ii) all corporate action has been taken by Tenant to approve this Amendment and the person signing this Amendment on
behalf of Tenant has been duly authorized to sign and deliver this Amendment on behalf of Tenant; (iii) no proceeding has been commenced by or against Tenant which seeks to declare Tenant a bankrupt or an insolvent or to liquidate or dissolve
the corporation, Tenant has made no general assignment of its assets for the benefit of its creditors, and no corporate action has been taken by Tenant authorizing any such proceeding, assignment or action; (iv) Tenant has not used,
manufactured, stored, or disposed of any hazardous or controlled substances or wastes which are regulated by any state, local or federal laws or ordinances on the Premises and to the best of Tenant’s knowledge, no such hazardous or controlled
substances or wastes have been spilled or otherwise disposed of on the Premises during the term of the Lease; and (v) this Amendment constitutes a legal, valid and binding agreement of Tenant enforceable against Tenant in accordance with its
terms. 
  
 (b) Tenant hereby certifies to Landlord that, as of the
execution and delivery of this Amendment by Tenant to Landlord, there are no existing defenses against the enforcement of any of the obligations of Tenant under the Lease, and Landlord is not in default under the Lease by reason of its failure to
perform any obligations thereunder, and there is no circumstance, event, condition or state of facts which, by the passage of time or the giving of notice, or both, could entitle Tenant to any such defenses or constitute or result in such a default.

  

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 10. Alterations. Provided Tenant complies with the provisions of Section 5 of the Existing
Lease, including, but not limited to, Sections 5.1(c) and 5.1(d), Landlord hereby consents to the installation by Tenant of double doors between the Original Premises and the Expansion Space. 
  
 11. Real Estate Brokers. Tenant represents and warrants that Tenant
has not had any dealings with any broker in connection with the negotiation or execution of this Amendment. Tenant agrees to indemnify Landlord and hold Landlord harmless from any and all costs (including attorneys’ fees), expenses or liability
for commissions or other compensation claimed by any broker or agent claiming to have had dealings with Tenant in connection with this Amendment. 
  
 12. Miscellaneous. 
  
 (a) Ratification. Except as modified by this Amendment, all of the terms, conditions and provisions of the Existing Lease shall remain in full
force and effect and are hereby ratified and confirmed. 
  
 (b)
Conflict. To the extent the terms of the Existing Lease and this Amendment are inconsistent, the terms of this Amendment shall control. 
  
 (c) No Offer. The submission of this Amendment to Tenant for examination or execution does not create an option or constitute an offer to Tenant to
amend the Existing Lease on the terms and conditions contained herein, and this Amendment shall not become effective as an amendment to the Existing Lease unless and until it has been executed and delivered by both Landlord and Tenant. 

 
 (d) Time of the Essence. Time is of the essence for each and every
provision of this Amendment. 
  
 (e) Entire Agreement. This
Amendment contains the entire agreement of Landlord and Tenant with respect to the subject matter hereof. It is understood that there are no oral agreements between Landlord and Tenant affecting the Existing Lease as hereby amended, and this
Amendment supersedes and cancels any and all previous negotiations, representations, agreements and understandings, if any, between Landlord and Tenant and their respective agents with respect to the subject matter thereof, and none shall be used to
interpret or construe the Lease. Tenant acknowledges that all prior communications from Landlord or its agents are not and were not, and shall not be construed to be, representations or warranties of Landlord or its agents as to the matters
communicated, and have not and will not be relied upon by Tenant. 
  

 7 

 IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to Lease to be executed on the
day and year set forth under their respective signatures below. 
  

					
	LANDLORD:
	
	CARRAMERICA REALTY OPERATING PARTNERSHIP, L.P.,
	a Delaware limited partnership
		
	By:	 	CarrAmerica Realty Corporation,
	 	 	a Maryland corporation, its general partner
			
	 	 	By:	 	 /s/    Christopher Peatross

	 	 	 	 	Christopher Peatross
	 	 	 	 	Managing Director

  

					
	Date of Execution:	 	 December 27, 2005

  

					
	
	TENANT:
	
	 PORTALPLAYER, INC.,
 a Delaware corporation

		
	By:	 	 /s/    Svend-Olav Carlsen

	Name:	 	 Svend-Olav Carlsen

	Title:	 	 Vice President and Chief Financial Officer

	Date of Execution:	 	 December 23, 2005

  

 8 

 EXHIBIT A 
  

EXPANSION SPACE 
  
 [Graphic Omitted]Amend. to Revolving Credit & Term Loan Agree. 9/30/2005

 EXHIBIT 10.6 
  
 FIRST AMENDMENT TO REVOLVING CREDIT 
 AND TERM LOAN AGREEMENT 
  
 THIS FIRST AMENDMENT TO REVOLVING CREDIT AND TERM LOAN AGREEMENT (Amendment”) is made effective this 30th day of September, 2005, by and between ADDVANTAGE TECHNOLOGIES GROUP, INC., an Oklahoma corporation (“Borrower”) and BANK OF OKLAHOMA, N.A. (“Lender”). 
  
 RECITALS 
  
 A. Reference is made to the Revolving Credit and Term Loan Agreement between Borrower and Lender dated September 30,2004
(“Credit Agreement”), pursuant to which exists a $7,000,000 Revolving Line and an $8,000,000 Term Loan. Terms used herein shall have the meanings ascribed to them in the Credit Agreement unless otherwise defined herein. 
  
 B. Borrower has requested Lender to renew the $7,000,000 Revolving Line and
Lender is willing to accommodate such request pursuant to the terms and conditions set forth in this Amendment. 
  
 AGREEMENT 
  
 NOW, THEREFORE, in consideration of the mutual covenants contained herein, Borrower and Lender do hereby agree as follows: 
  
 1. AMENDMENT TO THE CREDIT AGREEMENT. 
  
 1.1 Section 1.31 (LIBOR Rate) is hereby amended to evidence the phrase “the first Business Day of each subsequent calendar month” shall now mean
and read “the first day of each subsequent calendar month.” 
  
 2.
CONDITIONS PRECEDENT 
  

	 	2.1	Borrower shall execute and/or deliver to Lender the following: 

  

	 	2.1.1	This Amendment; 

  

	 	2.2	The $7,000,000 Line Note set forth as Schedule “2.1.2” hereto; 

  

	 	2.1.3.	any other instruments, documents or agreements reasonably requested by Lender in connection herewith. 

  
 3. Representations. As inducement for Lender to agree to this Amendment, the Borrower represents and warrants to Lender as follows:
(i) all representations and warranties set forth in the Credit Agreement and other Loan Documents remain true and correct as of the date hereof, and all schedules remain true and correct; (ii) no Initial Default or Matured Default exists under the
Credit Agreement or any other Loan Documents, and none shall arise as a result of the execution and performance under this Agreement and/or any documents executed and/or delivered by Borrower in connection herewith. 
  

 1 

 4. Ratification of and Amendment to Documents. Borrower hereby ratifies and confirms the Credit Agreement,
together with all security agreements, financing statements, instruments, documents and/or agreements executed and/or delivered by Borrowers to Lender in connection therewith (“Loan Documents”), and Borrower acknowledges, agrees,
represents and warrants that the Loan Documents are in full force and effect, binding and enforceable in accordance with their terms. 
  
 5. Ratification of Guaranty. Each Guarantor, by execution of the ratification following the signature page hereof, hereby agrees to the renewal of the $7,000,000
Revolving Line, and hereby ratifies and confirms its guaranty Agreement; and further confirms that, after giving effect to the amendments provided for herein, the Guaranty Agreement shall continue in full force and effect, and that each
representation and warranty set forth therein remains true and correct as of the date hereof. 
  
 6. Governing Law and Binding Effect. This Amendment shall be governed by and construed in accordance with the laws of the State of Oklahoma, and it, together with all documents executed and delivered in
connection herewith, shall be binding upon the parties hereto, their respective successors and assigns. 
  
 7. USA Patriot Act Notification. IMPORTANT INFORMATION ABOUT PROCEDURES FOR OPENING A NEW ACCOUNT. To help the government fight the funding of terrorism and money laundering activities, Federal law requires all
financial institutions to obtain, verify, and record information that identifies each person or entity that opens an account, including any deposit account, treasury management account, loan, other extension of credit, or other financial services
product. What this means for Borrower: When Borrower opens an account, if Borrower is an individual, Lender will ask for Borrower’s name, taxpayer identification number, residential address, date of birth, and other information that will allow
Lender to identify Borrower, and, if borrower is not an individual, Lender will ask for borrower’s name, taxpayer identification number, business address, and other information that will allow Lender to identify Borrower. Lender may also ask,
if Borrower is an individual, to see Borrower’s driver’s license or other identifying documents, and, if Borrower is not an individual, to see Borrower’s legal organizational documents or other identifying documents. 
  
 8. Costs, Expenses and Fees. Borrowers agree to pay all costs, expenses and fees
(including reasonable attorney fees) incurred by Bank in connection with the preparation of this Amendment or the administration hereof. 
  
 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their respective officers thereunto duly authorized, as of the date
first above written. 
  

			
	“Borrower”
	
	 ADDVANTAGE TECHNOLOGIES GROUP,
 INC., an Oklahoma corporation

		
	By	 	/s/    Ken Chymiak
	 	 	 Ken Chymiak, President and Chief
 Executive
Officer

  

 2 

			
	“Lender”
	
	BANK OF OKLAHOMA, N.A.
		
	By	 	/s/    W. Mack Renner
	 	 	W. Mack Renner, Assistant Vice President

  

 3 

 RATIFICATION OF GUARANTY 
  
 As inducement for the Lender to enter into the First Amendment to Revolving Credit and Term Loan Agreement
(“Amendment”) dated effective September 30, 2005, to which this Ratification is affixed, the undersigned Guarantors each hereby agree to Section 5 of the Amendment and further hereby ratifies and confirms its Guaranty Agreement.

  

			
	Tulsat Corporation, an Oklahoma corporation
		
	By	 	/s/    David Chymiak
	 	 	David Chymiak, President
	
	ADDvantage Technologies Group of Missouri, Inc., a Missouri corporation
		
	By	 	/s/    David Chymiak
	 	 	David Chymiak, Vice President
	
	ADDvantage Technologies Group of Nebraska, Inc., a Nebraska corporation
		
	By	 	/s/    Ken Chymiak
	 	 	Ken Chymiak, Vice President
	
	ADDvantage Technologies Group of Texas, Inc., a Texas corporation
		
	By	 	/s/    Ken Chymiak
	 	 	Ken Chymiak, Vice President
	
	NCS Industries, Inc., a Pennsylvania corporation
		
	By	 	/s/    David Chymiak
	 	 	David Chymiak, President

					
	
	 Tulsat Atlanta, LLC, an Oklahoma limited liability company
 (a subsidiary of Tulsat Corporation)

		
	By:	 	 ADDvantage Technologies Group, Inc.
 Its sole
member and Manager

			
	 	 	By	 	/s/    David Chymiak
	 	 	 	 	David Chymiak, Chairman of the Board

  

 4 

 Schedule “2.1.2” 
  
 ($7,000,000 Line Note) 
  

 5 

 PROMISSORY NOTE 
  

	 $7,000,000 
	 September 30, 2005 

 Tulsa, Oklahoma 
  
 FOR VALUE RECEIVED, the undersigned,
ADDVANTAGE TECHNOLOGIES GROUP, INC., AN Oklahoma corporation (“Maker”), promises to pay to the order of BANK OF OKLAHOMA, N.A. (“Lender”), at its offices in Tulsa, Oklahoma, the principal sum of SEVEN MILLION AND
NO/100 DOLLARS ($7,000,000,00) or, if less, the aggregate sum of advances made by Lender to Maker under the Revolving Credit and Term Loan Agreement between Maker and Lender dated September 30, 2004 (as amended, the “Credit Agreement”),
payable as follows: 
  

	 	a.	Principal. Principal shall be payable on September 30, 2006. 

  

	 	b.	Interest. Interest shall be payable monthly on the last day of each month, commencing October 31, 2005, and at maturity. Interest shall accrue on the principal balance
outstanding hereunder and on any past due interest hereunder at a rate at all times equal to the Note Rate (defined in the Credit Agreement). 

  
 If any payment shall be due on Saturday or Sunday or upon any other day on which state or national banks in the State of Oklahoma are closed for business
by virtue of a legal holiday for such banks, such payment shall be due and payable on the next succeeding banking day and interest shall accrue to such day. All interest due hereon shall be computed on the actual number of days elapsed (365 or 366)
based upon a 360-day year. 
  
 Such installment payments are to be
applied first to the payment of interest on the principal balance from time to time remaining unpaid at the aforesaid rate, and any balance shall be used to reduce the principal balance; except that if any advances made by the holder hereof under
the terms of any instrument, document or agreement executed by Maker in connection herewith have not been repaid, any monies received may, at the option of holder, be applied to any installment then due. Any prepayments shall be applied to
installments in the inverse order of occurrence. 
  
 All payments
under this Note shall be made in legal tender of the United States of America or in other immediately available funds at Lender’s office described above, and no credit shall be given for any payment received by check, draft or other instrument
or item until such time as the holder hereof shall have received credit therefor from the holder’s collecting agent or, in the event no collecting agent is used, from the bank or other financial institution upon which said check, draft or other
instrument or item is drawn. 
  
 From time to time the maturity
date of this Note may be extended or this Note may be renewed, in whole or in part, or a new note of different form may be substituted for this Note and/or the rate of interest may be changed, or changes may be made in consideration of loan
extensions, and the holder, from time to time, may waive or surrender, either in whole or in part, any rights, guarantees, security interests or liens given of the benefit of the holder in connection herewith; but no such occurrences shall in any
manner affect, limit, modify or otherwise impair any rights, guarantees or security of the holder not specifically waived, released or surrendered in writing, nor shall any maker, guarantor, endorser or any person who is or might be liable hereon,
either primarily or contingently, be released from such liability by reason of the occurrence of any such event. The holder hereof, from time to time, shall have the unlimited right to release any person who might be liable hereon; and such release
shall not affect or discharge the liability of any other person who is or might be liable hereon. 
  

 1 

 If any payment required by this Note to be made is not made within five (5) days of when due, or if any
default occurs under any loan agreement or under the provisions of any mortgage, security agreement, assignment, pledge or other document or agreement which provides security for the indebtedness evidenced by this Note, the holder hereof may, at its
option, without notice or demand, declare this Note in default and all indebtedness due and owning hereunder immediately due and payable. Interest from the date of default of such principal balance and on any past due interest hereunder shall accrue
at the rate of five percent (5%) per annum above the nondefault interest rate accruing hereunder. The Maker and any endorsers, guarantors and sureties hereby severally waive protest, presentment, demand, and notice of protest and nonpayment in case
this Note or any payment due hereunder is not paid when due; and they agree to any renewal, extension, acceleration, postponement of the time of payment, substitution, exchange or release of collateral and to the release of any party or person
primarily or contingently liable without prejudice to the holder and without notice to the Maker or any endorser, guarantor or surety. Maker and any guarantor, endorser, surety or any other person who is or may become liable hereon will, on demand,
pay all costs of collection, including reasonable attorney fees of the holder hereof in attempting to enforce payment of this Note and reasonable attorney fees for defending the validity of any document securing this Note as a valid first and prior
lien. 
  
 Upon the occurrence of any default hereunder, Lender
shall have the right, immediately and without further action by it, to set off against this Note all money owed by Lender in any capacity to the Maker or any guarantor, endorser or other person who is or might be liable for payment hereof, whether
or not due, and also to set off against all other liabilities of Maker to Lender all money owned by Lender in any capacity to Maker; and Lender shall be deemed to have exercised such right of setoff and to have made a charge against such money
immediately upon the occurrence of such default even though such charge is made or entered into the books of Lender subsequently thereto. 
  
 The holder of this Note may collect a late charge not to exceed an amount equal to five percent (5%) of the amount of any payment which is not paid within
ten (10) days from the due date thereof, for the purposes of covering the extra expenses involved in handling delinquent payments. This late charge provision shall not be applicable in the event the holder hereof, at its option, elects to receive
interest at the increased rate as provided hereunder in the event of default. 
  
 This Note is given for any actual loan of money for business purposes and not for personal, agricultural or residential purposes, and is executed and delivered in the State of Oklahoma and shall be governed by and
construed in accordance with the laws of the State of Oklahoma. 
  
 This Note constitutes an extension of the $7,000,000 Promissory Note from Maker to Lender dated September 30, 2004. 
  
 [Signature Page to Follow] 
  

 2 

 [Signature Page to $7,000,000 Promissory Note] 
  

			
	 ADDVANTAGE TECHNOLOGIES GROUP,
 INC., an Oklahoma corporation

		
	By	 	/s/    Ken Chymiak
	 	 	 Ken Chymiak, President and Chief
 Executive
Officer

  

 3

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