Exhibit 10.5

EIGHTH AMENDMENT TO REVOLVING CREDIT,

TERM LOAN AND SECURITY AGREEMENT

THIS EIGHTH AMENDMENT TO REVOLVING CREDIT, TERM LOAN AND SECURITY AGREEMENT (the “Agreement”) is entered into as of May 14, 2015 by and among BLONDER TONGUE LABORATORIES, INC., a corporation organized under the laws of the State of Delaware (“BTL”), R. L. DRAKE HOLDINGS, LLC, a limited liability company organized under the laws of the State of Delaware (“RL Drake” and collectively with BTL, the “Borrower”), the financial institutions which are now or which hereafter become a party hereto (collectively, the “Lenders” and individually a “Lender”) and SANTANDER BANK, N.A. (formerly known as Sovereign Bank, N.A.) (“Santander”), as agent for Lenders (Santander, in such capacity, the “Agent”).

RECITALS

Whereas, the Borrower and the Lenders entered into a Revolving Credit, Term Loan and Security Agreement dated August 6, 2008, as amended by that certain First Amendment to Revolving Credit Term Loan and Security Agreement dated January 14, 2011, that certain Second Amendment to Revolving Credit Term Loan and Security Agreement dated February 1, 2012, that certain letter agreement dated August 10, 2012 (constituting the third amendment to the Revolving Credit, Term Loan and Security Agreement), that certain Fourth Amendment to Revolving Credit, Term Loan and Security Agreement dated March 27, 2013, that certain Fifth Amendment to Revolving Credit, Term Loan and Security Agreement dated November 13, 2013, that certain Sixth Amendment to Revolving Credit, Term Loan and Security Agreement dated March 28, 2014 and that certain Seventh Amendment to Revolving Credit, Term Loan and Security Agreement dated January 21, 2015 as the same shall be further amended by this Agreement (as may be further amended, restated, replaced and/or modified from time to time, the “Loan Agreement”); and

Whereas, the Borrower and the Lenders have agreed to modify the terms of the Loan Agreement as set forth in this Agreement to, among other things, modifying certain financial covenants set forth in the Loan Agreement.

Now, therefore, in consideration of the Lender’s continued extension of credit and the agreements contained herein, the parties agree as follows:

AGREEMENT

“Additional Availability Period” shall mean the period beginning on the date of the Eighth Amendment and ending on close of business on September 30, 2015.

“Eighth Amendment” shall mean that certain Eighth Amendment to Revolving Credit, Term Loan and Security Agreement dated the Eighth Amendment Closing Date by and among the Borrower, the Lenders and the Agent.

“Eighth Amendment Closing Date” shall mean as of May 14, 2015.

(A)   the Loan Agreement and Other Documents, as amended hereby, are in full force and effect without any defense, claim, counterclaim, right or claim of set-off;

(B)   to the best of its knowledge, no default by the Agent or the Lenders in the performance of their duties under the Loan Agreement or the Other Documents has occurred;

(C)   all representations and warranties of the Borrower contained herein and in the Other Documents are true and correct in all material respects as of this date, except for any representation or warranty that specifically refers to an earlier date;

(D)   the Borrower has taken all necessary action to authorize the execution and delivery of this Agreement; and

(E)   this Agreement is a modification of an existing obligation and is not a novation.

(A)   provide the Agent with this Agreement, properly executed;

(B)   pay to the Agent an amendment fee in the amount of $15,000; and

(C)   pay, promptly upon presentation of an invoice therefor, all other fees and costs incurred by the Lenders in entering into this Agreement, including, but not limited to, all reasonable legal fees incurred by the Agent.

IN WITNESS WHEREOF, the undersigned have signed and sealed this Agreement the day and year first above written.