SecondAmendment to Purchase Agreement ACQUSITION OF DYNAMAC’S PROPRIETARY LINE OF RF AND MICROWAVE TEST & MEASUREMENTPRODUCTS

Exhibit 10.3

Second Amendment to Purchase Agreement

ACQUSITION OF DYNAMAC’S PROPRIETARY LINE OF

RF AND MICROWAVE TEST & MEASUREMENT PRODUCTS

This SECOND Amendment to Purchase Agreement (this “Second Amendment”) is entered into as of November 22, 2016 by and among Microphase Instruments, LLC, a Delaware limited liability company with offices at 100 Trap Falls Road Extension, Suite 400, Shelton, CT 06484 (the “Purchaser”), Dynamac, Inc., an Illinois corporation with offices at 1229 Capitol Drive, Addison, IL 60101(the “Seller”) and Microphase Corporation, a Connecticut corporation with offices at 100 Trap Falls Road Extension, Suite 400, Shelton, CT 06484 (“Parent”). The Purchaser, the Seller and Parent are also each hereinafter referred to individually as “a Party” and together as “the Parties”.

RECITALS

WHEREAS, the Purchaser and the Seller entered into that certain purchase agreement dated as of January 21, 2016, pursuant to which the Purchaser agreed to purchase and the Seller agreed to sell, for good and valuable consideration, Dynamac’s entire line of proprietary radio frequency (“RF”) and microwave test and measurement products, all associated accessories, all housings, cases and packaging designs and materials and all intellectual property rights (the “Original Agreement”);

WHEREAS, the Parties entered into an Amendment to Purchase Agreement on November 2, 2016 (“the First Amendment”) pursuant to which the Parties agreed, among other things, that the assets described in the Original Agreement would not be assigned and transferred to the Purchaser until such time as the Purchaser has delivered to the Seller the entire purchase price owed pursuant to the First Amendment and the Seller agreed that the first installment of such purchase price, in the amount of $559,000, would not be due until November 22, 2016;

WHEREAS, the Parties desire to amend the First Amendment to revise the terms of the Purchaser’s payment to Seller, among other things; and

WHEREAS, the Parties desire that, as of the date hereof, each and every other agreement or understanding, oral or written, between the Parties relating to the purchase, acquisition, strategic partnership, or joint venture involving test & measurement products of the Seller is hereby amended and superseded with this Agreement;

NOW THEREFORE, for good and valuable consideration, the receipt of which is hereby acknowledged, the Parties hereby agree as follows:

“November 22, 2016” shall be deleted and replaced with “December 9, 2016”.

IN WITNESS WHEREOF, each of the undersigned hereby (a) executes this Agreement; (b) confirms its agreement with the provisions and covenants herein provided; and (c) agrees to be bound by this Agreement.