Exhibit 10.58

Wachovia Capital Finance Corporation (Canada)

40 King Street West

Suite 2500

Toronto, ON M5H 3Y2



|     |  |                  |  |     
|---- |  | ---------------- |  | ----
|LOGO |  | December 4, 2009 |  | LOGO

VIA EMAIL

SMTC Manufacturing Corporation of Canada/

Societe de Fabrication SMTC du Canada

635 Hood Road

Markham, Ontario L3R 4N6

Dear Ms. Jane Todd:



| | Re: | Wachovia Capital Finance Corporation (Canada) and SMTC Manufacturing Corporation of Canada/Societe de Fabrication SMTC du Canada
| | --- | --------------------------------------------------------------------------------------------------------------------------------

Reference is made to the Second Amended and Restated Canadian Loan Agreement dated as of August 7, 2008 as amended
by letter agreement dated November 19, 2008, April 2, 2009 and August 4, 2009 (as amended, modified, supplemented, extended, renewed, restated or replaced from time to time, the Canadian Loan Agreement) between
Wachovia Capital Finance Corporation (Canada), as the Revolving Lender and the Agent, and SMTC Manufacturing Corporation of Canada/Societe de Fabrication STMC du Canada, as the Canadian Borrower.



| | 1. | Definitions. In this letter, unless otherwise defined or the context otherwise requires, all capitalized terms shall have the respective meanings specified in
the Canadian Loan Agreement.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | Amendment to Canadian Loan Agreement.
| | -- | -------------------------------------



| | (a) | This letter is an amendment to the Canadian Loan Agreement. Unless the context of this letter otherwise requires, the Canadian Loan Agreement and this letter shall be
read together and shall have effect as if the provisions of the Canadian Loan Agreement and this letter were contained in one agreement. The term Agreement when used in the Canadian Loan Agreement means the Canadian Loan Agreement as
amended by this letter, together with all amendments, modifications, supplements, extensions, renewals, restatements and replacements thereof from time to time.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | The Canadian Loan Agreement is amended as follows:
| | --- | --------------------------------------------------



| | (i) | Section 8.25 Maximum Unfunded Capital Expenditures of the Canadian Loan Agreement is deleted and replaced with:
| | --- | -----------------------------------------------------------------------------------------------------------------



| | 8.25 | Maximum Unfunded Capital Expenditures
| | ----- | -------------------------------------



---

The Canadian Borrower shall ensure that SMTC Corporation and its
Subsidiaries do not, directly or indirectly, make or commit to make, whether through purchase, capital leases or otherwise, unfunded Capital Expenditures in an aggregate amount in excess of US$1,600,000 for fiscal year 2009 of SMTC Corporation.

It is the intention of the Agent and the Canadian Borrower to reset in writing the Maximum Unfunded Capital
Expenditures covenant in Section 8.25 by July 10, 2010 and if the Agent and the Canadian Borrower cannot agree on such reset by July 10, 2010 then the maximum unfunded capital expenditure amount above shall be US$500,000 plus
one hundred (100%) percent of the unused portion of the permitted Capital Expenditures amount for fiscal year 2009 for fiscal year 2010 and US$500,000 for each fiscal year of SMTC Corporation on a go forward basis..



| | (c) | The effective date of the amendment to the Canadian Loan Agreement provided in this letter is December 4, 2009.
| | --- | ---------------------------------------------------------------------------------------------------------------



| | 3. | No Novations. Nothing in this letter, or in the Canadian Loan Agreement when read together with this letter, shall constitute a novation, payment, re-advance or
reduction or termination in respect of any Obligations.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4. | Financing Agreement. This letter is a Financing Agreement.
| | -- | ----------------------------------------------------------



| | 5. | Expenses. The Canadian Borrower shall pay all fees, expenses and disbursements including, without limitation, legal fees, incurred by or payable to the Agent and
Revolving Lender in connection with the preparation, negotiation, completion, execution, delivery and review of this letter and all other documents and instruments arising therefrom and/or executed in connection therewith.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 6. | Continuance of Canadian Loan Agreement and Security.
| | -- | ----------------------------------------------------



| | (a) | The Canadian Loan Agreement, as amended by this letter, shall be and continue in full force and effect and is hereby confirmed and the rights and obligations of all
parties thereunder shall not be affected or prejudiced in any manner except as specifically provided for herein.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | Each of the Canadian Borrower and the Obligors hereby acknowledges, confirms and agrees that:
| | --- | ---------------------------------------------------------------------------------------------



| | (i) | all security delivered by the Canadian Borrower and the Obligors in connection with the Canadian Loan Agreement secures the payment of all of the Obligations including,
without limitation, the obligations arising under the Canadian Loan Agreement, as amended by the terms of this letter; and
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | the Agent and the Canadian Lenders shall continue to have valid, enforceable and perfected first priority liens upon the collateral described in the Financing
Agreements, subject only to liens expressly permitted pursuant to the Canadian Loan Agreement.
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | (c) | To induce the Agent and the Revolving Lender to enter into this letter, each of the Canadian Borrower and the Obligors hereby represent and warrant to each of the Agent
and the Revolving Lender as follows, which representations and warranties shall survive the execution and delivery of this letter:
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (i) | the Canadian Borrower and the Obligors are in compliance with all covenants in the Financing Agreements;
| | --- | --------------------------------------------------------------------------------------------------------



| | (ii) | all the representations and warranties set out in the Financing Agreements are true and accurate;
| | ---- | -------------------------------------------------------------------------------------------------



| | (iii) | no Default or Event of Default has occurred or is continuing;
| | ----- | -------------------------------------------------------------



| | (iv) | no material adverse change has occurred with respect to any of the Canadian Borrower or the Obligors since the date of the Agents latest field examination and no
change or event has occurred which would have a material adverse effect on any of the Canadian Borrower or the Obligors;
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (v) | the execution delivery, delivery and performance of this letter and the transactions contemplated hereunder are all within its powers, have been duly authorized by it
and are not in contravention of law or the terms of its organizational documents or any indenture, agreement or undertaking to which it is a party or by which it or its property is bound;
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (vi) | it has duly executed and delivered this letter; and
| | ---- | ---------------------------------------------------



| | (vii) | this letter constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms.
| | ----- | ---------------------------------------------------------------------------------------------------------------------



| | 7. | Counterparts. This letter may be executed in any number of separate original, facsimile or pdf counterparts, each of which shall be deemed an original and all of
said counterparts taken together shall be deemed to constitute one and the same instrument.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 8. | Governing Law. The validity, interpretation and enforcement of this letter and any dispute arising out of the relationship between the parties hereto, whether in
contract, tort, equity or otherwise, shall be governed by the laws of the Province of Ontario and the federal laws of Canada applicable therein.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 9. | Further Assurances. At the request of any of the Agent or the Revolving Lender at any time and from time to time, each of the Canadian Borrower and the Obligors
shall, at their expense, duly execute and deliver, or cause to be duly executed and delivered, such further agreements, documents and instruments, and do or cause to be done such further acts as may be requested by any of the Agent or the Revolving
Lender to effectuate the provisions or purposes of this letter.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 10. | Amendments and Waivers. Neither this letter nor any provision hereof shall be amended, modified, waived or discharged orally or by course of conduct, but only by
a written agreement signed by the parties hereto.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | 11. | Headings. The division of this letter into sections and the insertion of headings are for convenience of reference only and shall not affect the construction or
interpretation of this letter.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 12. | Successors and Assigns. This letter shall be binding upon and inure to the benefit of and be enforceable by the Agent, the Revolving Lender, the Canadian
Borrower and the Obligors and their respective successors and assigns, The Canadian Borrower and the Obligors may not assign their respective rights under this letter without the prior written consent of the Agent and the Revolving Lender,
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 13. | Partial Invalidity. If any provision of this letter is held to be invalid or unenforceable, such invalidity or unenforceability shall not invalidate this letter
as a whole, but this letter shall be construed as though it did not contain the particular provision held to be invalid or unenforceable and the rights and obligations of the parties shall be construed and enforced only to such extent as shall be
permitted by applicable law.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 14. | Acceptance. If the foregoing correctly sets out our agreement, please indicate your acceptance of this letter by signing below and returning an executed copy to
us by no later than 5:00 p.m. on December 4, 2009 (the Effective Date). If not so signed and returned to us by all parties hereto on the Effective Date, this letter shall be null and void.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |                                                                                |  |        |  |                                                                    |  |  |  | 
| |  | ------------------------------------------------------------------------------ |  | ------ |  | ------------------------------------------------------------------ |  |  |  | 
| |  | Yours truly,                                                                   |  |        |  |                                                                   
| |  |                                                                                | 
| |  | REVOLVING LENDER AND AGENT:                                                    |  |        |  |                                                                   
| |  |                                                                                | 
| |  | WACHOVIA CAPITAL FINANCE                                                       |  |        |  |                                                                   
| |  | CORPORATION (CANADA)                                                           |  |        |  |                                                                   
| |  |                                                                                |  |       
| |  | By:                                                                            |  | LOGO   |  |                                                                    |  | 
| |  |                                                                                |  | Name:  |  | Carmela Massari                                                    |  |  |  | 
| |  |                                                                                |  | Title: |  | First Vice President Wachovia Capital Finance Corporation (Canada) |  |  |  | 
| |  |                                                                                |  |       
| |  | By:                                                                            |  |        |  |                                                                    |  | 
| |  |                                                                                |  | Name:  |  |                                                                    |  |  |  | 
| |  |                                                                                |  | Title: |  |                                                                    |  |  |  | 
| |  |                                                                                | 
| |  | Agreed this 4th day of December 2009.                                          |  |        |  |                                                                   
| |  |                                                                                | 
| |  | CANADIAN BORROWER:                                                             |  |        |  |                                                                   
| |  |                                                                                | 
| |  | SMTC MANUFACTURING CORPORATION OF CANADA/SOCIETE DE FABRICATION SMTC DU CANADA |  |        |  |                                                                   
| |  |                                                                                |  |       
| |  | By:                                                                            |  | LOGO   |  |                                                                    |  | 
| |  |                                                                                |  | Name:  |  | J Todd                                                             |  |  |  | 
| |  |                                                                                |  | Title: |  | Secretary & Treasurer                                              |  |  |  | 
| |  |                                                                                |  |       
| |  | By:                                                                            |  |        |  |                                                                    |  | 
| |  |                                                                                |  | Name:  |  |                                                                    |  |  |  | 
| |  |                                                                                |  | Title: |  |                                                                    |  |  |  | 



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OBLIGORS:

Each of the undersigned Obligors hereby:



| | (a) | acknowledges, confirms and agrees that such Obligors Financing Agreements (as each of the same may have been amended, modified, supplemented, extended, renewed,
restated or replaced) remain in full force and effect as at the date hereof in respect of the Obligations under the Canadian Loan Agreement;
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | acknowledges and confirms that such Obligor has received a copy of the Canadian Loan Agreement and this letter and understands and agrees to the terms thereof;
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (c) | acknowledges and confirms that the representations and warranties set forth in the Financing Agreements to which it is a party continue to be true and correct as of the
date hereof; and
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (d) | acknowledges and confirms that it is in compliance with the covenants set forth in the Financing Agreements to which it is a party as of the date hereof.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------

Dated as of the 4th day of December, 2009.



| |  |                    |  |        |  |                                           |  |     |  |      |  |        |  | 
| |  | ------------------ |  | ------ |  | ----------------------------------------- |  | --- |  | ---- |  | ------ |  | 
| |  | SMTC CORPORATION   |  |        |  | SMTC HOLDINGS, LLC                       
| |  |                    |  |        | 
| |  | By:                |  | LOGO   |  |                                           |  | By: |  | LOGO
| |  |                    |  | Name:  |  | J Todd                                    |  |     |  |      |  | Name:  |  | 
| |  |                    |  | Title: |  | Secretary & Treasurer                     |  |     |  |      |  | Title: |  | 
| |  |                    |  |        | 
| |  | By:                |  |        |  |                                           |  | By: |  |     
| |  |                    |  | Name:  |  |                                           |  |     |  |      |  | Name:  |  | 
| |  |                    |  | Title: |  |                                           |  |     |  |      |  | Title: |  | 
| |  |                    | 
| |  | HTM HOLDINGS, INC. |  |        |  | RADIO COMPONENTES DE MEXICO, S.A. DE C.V.
| |  |                    |  |        | 
| |  | By:                |  | LOGO   |  |                                           |  | By: |  | LOGO
| |  |                    |  | Name:  |  |                                           |  |     |  |      |  | Name:  |  | 
| |  |                    |  | Title: |  |                                           |  |     |  |      |  | Title: |  | 
| |  |                    |  |        | 
| |  | By:                |  |        |  |                                           |  | By: |  |     
| |  |                    |  | Name:  |  |                                           |  |     |  |      |  | Name:  |  | 
| |  |                    |  | Title: |  |                                           |  |     |  |      |  | Title: |  | 



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| |  |                                                 |  |        |  |                          |  |     |  |      |  |        |  | 
| |  | ----------------------------------------------- |  | ------ |  | ------------------------ |  | --- |  | ---- |  | ------ |  | 
| |  | SMTC DE CHIHUAHUA, S.A. DE C.V.                 |  |        |  | SMTC NOVA SCOTIA COMPANY
| |  |                                                 |  |        | 
| |  | By:                                             |  | LOGO   |  |                          |  | By: |  | LOGO
| |  |                                                 |  | Name:  |  | J Todd                   |  |     |  |      |  | Name:  |  | 
| |  |                                                 |  | Title: |  | Secretary & Treasurer    |  |     |  |      |  | Title: |  | 
| |  |                                                 |  |        | 
| |  | By:                                             |  |        |  |                          |  | By: |  |     
| |  |                                                 |  | Name:  |  |                          |  |     |  |      |  | Name:  |  | 
| |  |                                                 |  | Title: |  |                          |  |     |  |      |  | Title: |  | 
| |  |                                                 | 
| |  | SMTC MANUFACTURING CORPORATION OF CALIFORNIA    |  |        |  | SMTC MEX HOLDINGS, INC. 
| |  |                                                 |  |        | 
| |  | By:                                             |  | LOGO   |  |                          |  | By: |  | LOGO
| |  |                                                 |  | Name:  |  |                          |  |     |  |      |  | Name:  |  | 
| |  |                                                 |  | Title: |  |                          |  |     |  |      |  | Title: |  | 
| |  |                                                 |  |        | 
| |  | By:                                             |  |        |  |                          |  | By: |  |     
| |  |                                                 |  | Name:  |  |                          |  |     |  |      |  | Name:  |  | 
| |  |                                                 |  | Title: |  |                          |  |     |  |      |  | Title: |  | 
| |  |                                                 |  |        | 
| |  | SMTC MANUFACTURING CORPORATION OF MASSACHUSETTS |  |        |  |                          |  |     |  |     
| |  |                                                 |  |        |  |                         
| |  | By:                                             |  | LOGO   |  |                          |  |     |  |      |  |       
| |  |                                                 |  | Name:  |  |                          |  |     |  |      |  |        |  | 
| |  |                                                 |  | Title: |  |                          |  |     |  |      |  |        |  | 
| |  |                                                 |  |        |  |                         
| |  | By:                                             |  |        |  |                          |  |     |  |      |  |       
| |  |                                                 |  | Name:  |  |                          |  |     |  |      |  |        |  | 
| |  |                                                 |  | Title: |  |                          |  |     |  |      |  |        |  | 



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