Contract

EXHIBIT 10(a)(4)

Huntington

The Huntington National Bank
18000 Jefferson Xxxx Xxxxx - Xxxxx 000
Xxxxxxxxxx Xxxxxxx, Xxxx 00000

000 515-0362
Fax 216 515-0179

August 1,200l



Xxxxxxx X. Xxxxxx
Vice President
Hickok Incorporated
00000 Xxxxxx Xxxxxx
Xxxxxxxxx, Xxxx 00000-0000

Dear Xx. Xxxxxx:

Currently Xxxxxx Inc.‘s credit agreement requires the company to maintain $7MM in working
capital. Due to a downturn in business, the company projects violating the covenant at 6-30-01
(which is their third quarter) when working capital is projected to be $6.9MM. Company
prepared projections show the company being in compliance by 9-30-O1.

Huntington National Bank will amend the working capital covenant to $6MM until
12-31-01 at which time it will revert to $7MM.

Please acknowledge acceptance of this amendment by signing the enclosed copy of this letter
and return to me in the enclosed envelope.

Sincerely,


/s/ XXXXX X. XXXXXX
Xxxxx X. Xxxxxx
Vice President


Xxx Xxxxxx

/s/ XXXXXX X. XXXXXX 8/3/01
Agree to the amendment above Date